1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
2646
2647
2648
2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677
2678
2679
2680
2681
2682
2683
2684
2685
2686
2687
2688
2689
2690
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717
2718
2719
2720
2721
2722
2723
2724
2725
2726
2727
2728
2729
2730
2731
2732
2733
2734
2735
2736
2737
2738
2739
2740
2741
2742
2743
2744
2745
2746
2747
2748
2749
2750
2751
2752
2753
2754
2755
2756
2757
2758
2759
2760
2761
2762
2763
2764
2765
2766
2767
2768
2769
2770
2771
2772
2773
2774
2775
2776
2777
2778
2779
2780
2781
2782
2783
2784
2785
2786
2787
2788
2789
2790
2791
2792
2793
2794
2795
2796
2797
2798
2799
2800
2801
2802
2803
2804
2805
2806
2807
2808
2809
2810
2811
2812
2813
2814
2815
2816
2817
2818
2819
2820
2821
2822
2823
2824
2825
2826
2827
2828
2829
2830
2831
2832
2833
2834
2835
2836
2837
2838
2839
2840
2841
2842
2843
2844
2845
2846
2847
2848
2849
2850
2851
2852
2853
2854
2855
2856
2857
2858
2859
2860
2861
2862
2863
2864
2865
2866
2867
2868
2869
2870
2871
2872
2873
2874
2875
2876
2877
2878
2879
2880
2881
2882
2883
2884
2885
2886
2887
2888
2889
2890
2891
2892
2893
2894
2895
2896
2897
2898
2899
2900
2901
2902
2903
2904
2905
2906
2907
2908
2909
2910
2911
2912
2913
2914
2915
2916
2917
2918
2919
2920
2921
2922
2923
2924
2925
2926
2927
2928
2929
2930
2931
2932
2933
2934
2935
2936
2937
2938
2939
2940
2941
2942
2943
2944
2945
2946
2947
2948
2949
2950
2951
2952
2953
2954
2955
2956
2957
2958
2959
2960
2961
2962
2963
2964
2965
2966
2967
2968
2969
2970
2971
2972
2973
2974
2975
2976
2977
2978
2979
2980
2981
2982
2983
2984
2985
2986
2987
2988
2989
2990
2991
2992
2993
2994
2995
2996
2997
2998
2999
3000
3001
3002
3003
3004
3005
3006
3007
3008
3009
3010
3011
3012
3013
3014
3015
3016
3017
3018
3019
3020
3021
3022
3023
3024
3025
3026
3027
3028
3029
3030
3031
3032
3033
3034
3035
3036
3037
3038
3039
3040
3041
3042
3043
3044
3045
3046
3047
3048
3049
3050
3051
3052
3053
3054
3055
3056
3057
3058
3059
3060
3061
3062
3063
3064
3065
3066
3067
3068
3069
3070
3071
3072
3073
3074
3075
3076
3077
3078
3079
3080
3081
3082
3083
3084
3085
3086
3087
3088
3089
3090
3091
3092
3093
3094
3095
3096
3097
3098
3099
3100
3101
3102
3103
3104
3105
3106
3107
3108
3109
3110
3111
3112
3113
3114
3115
3116
3117
3118
3119
3120
3121
3122
3123
3124
3125
3126
3127
3128
3129
3130
3131
3132
3133
3134
3135
3136
3137
3138
3139
3140
3141
3142
3143
3144
3145
3146
3147
3148
3149
3150
3151
3152
3153
3154
3155
3156
3157
3158
3159
3160
3161
3162
3163
3164
3165
3166
3167
3168
3169
3170
3171
3172
3173
3174
3175
3176
3177
3178
3179
3180
3181
3182
3183
3184
3185
3186
3187
3188
3189
3190
3191
3192
3193
3194
3195
3196
3197
3198
3199
3200
3201
3202
3203
3204
3205
3206
3207
3208
3209
3210
3211
3212
3213
3214
3215
3216
3217
3218
3219
3220
3221
3222
3223
3224
3225
3226
3227
3228
3229
3230
3231
3232
3233
3234
3235
3236
3237
3238
3239
3240
3241
3242
3243
3244
3245
3246
3247
3248
3249
3250
3251
3252
3253
3254
3255
3256
3257
3258
3259
3260
3261
3262
3263
3264
3265
3266
3267
3268
3269
3270
3271
3272
3273
3274
3275
3276
3277
3278
3279
3280
3281
3282
3283
3284
3285
3286
3287
3288
3289
3290
3291
3292
3293
3294
3295
3296
3297
3298
3299
3300
3301
3302
3303
3304
3305
3306
3307
3308
3309
3310
3311
3312
3313
3314
3315
3316
3317
3318
3319
3320
3321
3322
3323
3324
3325
3326
3327
3328
3329
3330
3331
3332
3333
3334
3335
3336
3337
3338
3339
3340
3341
3342
3343
3344
3345
3346
3347
3348
3349
3350
3351
3352
3353
3354
3355
3356
3357
3358
3359
3360
3361
3362
3363
3364
3365
3366
3367
3368
3369
3370
3371
3372
3373
3374
3375
3376
3377
3378
3379
3380
3381
3382
3383
3384
3385
3386
3387
3388
3389
3390
3391
3392
3393
3394
3395
3396
3397
3398
3399
3400
3401
3402
3403
3404
3405
3406
3407
3408
3409
3410
3411
3412
3413
3414
3415
3416
3417
3418
3419
3420
3421
3422
3423
3424
3425
3426
3427
3428
3429
3430
3431
3432
3433
3434
3435
3436
3437
3438
3439
3440
3441
3442
3443
3444
3445
3446
3447
3448
3449
3450
3451
3452
3453
3454
3455
3456
3457
3458
3459
3460
3461
3462
3463
3464
3465
3466
3467
3468
3469
3470
3471
3472
3473
3474
3475
3476
3477
3478
3479
3480
3481
3482
3483
3484
3485
3486
3487
3488
3489
3490
3491
3492
3493
3494
3495
3496
3497
3498
3499
3500
3501
3502
3503
3504
3505
3506
3507
3508
3509
3510
3511
3512
3513
3514
3515
3516
3517
3518
3519
3520
3521
3522
3523
3524
3525
3526
3527
3528
3529
3530
3531
3532
3533
3534
3535
3536
3537
3538
3539
3540
3541
3542
3543
3544
3545
3546
3547
3548
3549
3550
3551
3552
3553
3554
3555
3556
3557
3558
3559
3560
3561
3562
3563
3564
3565
3566
3567
3568
3569
3570
3571
3572
3573
3574
3575
3576
3577
3578
3579
3580
3581
3582
3583
3584
3585
3586
3587
3588
3589
3590
3591
3592
3593
3594
3595
3596
3597
3598
3599
3600
3601
3602
3603
3604
3605
3606
3607
3608
3609
3610
3611
3612
3613
3614
3615
3616
3617
3618
3619
3620
3621
3622
3623
3624
3625
3626
3627
3628
3629
3630
3631
3632
3633
3634
3635
3636
3637
3638
3639
3640
3641
3642
3643
3644
3645
3646
3647
3648
3649
3650
3651
3652
3653
3654
3655
3656
3657
3658
3659
3660
3661
3662
3663
3664
3665
3666
3667
3668
3669
3670
3671
3672
3673
3674
3675
3676
3677
3678
3679
3680
3681
3682
3683
3684
3685
3686
3687
3688
3689
3690
3691
3692
3693
3694
3695
3696
3697
3698
3699
3700
3701
3702
3703
3704
3705
3706
3707
3708
3709
3710
3711
3712
3713
3714
3715
3716
3717
3718
3719
3720
3721
3722
3723
3724
3725
3726
3727
3728
3729
3730
3731
3732
3733
3734
3735
3736
3737
3738
3739
3740
3741
3742
3743
3744
3745
3746
3747
3748
3749
3750
3751
3752
3753
3754
3755
3756
3757
3758
3759
3760
3761
3762
3763
3764
3765
3766
3767
3768
3769
3770
3771
3772
3773
3774
3775
3776
3777
3778
3779
3780
3781
3782
3783
3784
3785
3786
3787
3788
3789
3790
3791
3792
3793
3794
3795
3796
3797
3798
3799
3800
3801
3802
3803
3804
3805
3806
3807
3808
3809
3810
3811
3812
3813
3814
3815
3816
3817
3818
3819
3820
3821
3822
3823
3824
3825
3826
3827
3828
3829
3830
3831
3832
3833
3834
3835
3836
3837
3838
3839
3840
3841
3842
3843
3844
3845
3846
3847
3848
3849
3850
3851
3852
3853
3854
3855
3856
3857
3858
3859
3860
3861
3862
3863
3864
3865
3866
3867
3868
3869
3870
3871
3872
3873
3874
3875
3876
3877
3878
3879
3880
3881
3882
3883
3884
3885
3886
3887
3888
3889
3890
3891
3892
3893
3894
3895
3896
3897
3898
3899
3900
3901
3902
3903
3904
3905
3906
3907
3908
3909
3910
3911
3912
3913
3914
3915
3916
3917
3918
3919
3920
3921
3922
3923
3924
3925
3926
3927
3928
3929
3930
3931
3932
3933
3934
3935
3936
3937
3938
3939
3940
3941
3942
3943
3944
3945
3946
3947
3948
3949
3950
3951
3952
3953
3954
3955
3956
3957
3958
3959
3960
3961
3962
3963
3964
3965
3966
3967
3968
3969
3970
3971
3972
3973
3974
3975
3976
3977
3978
3979
3980
3981
3982
3983
3984
3985
3986
3987
3988
3989
3990
3991
3992
3993
3994
3995
3996
3997
3998
3999
4000
4001
4002
4003
4004
4005
4006
4007
4008
4009
4010
4011
4012
4013
4014
4015
4016
4017
4018
4019
4020
4021
4022
4023
4024
4025
4026
4027
4028
4029
4030
4031
4032
4033
4034
4035
4036
4037
4038
4039
4040
4041
4042
4043
4044
4045
4046
4047
4048
4049
4050
4051
4052
4053
4054
4055
4056
4057
4058
4059
4060
4061
4062
4063
4064
4065
4066
4067
4068
4069
4070
4071
4072
4073
4074
4075
4076
4077
4078
4079
4080
4081
4082
4083
4084
4085
4086
4087
4088
4089
4090
4091
4092
4093
4094
4095
4096
4097
4098
4099
4100
4101
4102
4103
4104
4105
4106
4107
4108
4109
4110
4111
4112
4113
4114
4115
4116
4117
4118
4119
4120
4121
4122
4123
4124
4125
4126
4127
4128
4129
4130
4131
4132
4133
4134
4135
4136
4137
4138
4139
4140
4141
4142
4143
4144
4145
4146
4147
4148
4149
4150
4151
4152
4153
4154
4155
4156
4157
4158
4159
4160
4161
4162
4163
4164
4165
4166
4167
4168
4169
4170
4171
4172
4173
4174
4175
4176
4177
4178
4179
4180
4181
4182
4183
4184
4185
4186
4187
4188
4189
4190
4191
4192
4193
4194
4195
4196
4197
4198
4199
4200
4201
4202
4203
4204
4205
4206
4207
4208
4209
4210
4211
4212
4213
4214
4215
4216
4217
4218
4219
4220
4221
4222
4223
4224
4225
4226
4227
4228
4229
4230
4231
4232
4233
4234
4235
4236
4237
4238
4239
4240
4241
4242
4243
4244
4245
4246
4247
4248
4249
4250
4251
4252
4253
4254
4255
4256
4257
4258
4259
4260
4261
4262
4263
4264
4265
4266
4267
4268
4269
4270
4271
4272
4273
4274
4275
4276
4277
4278
4279
4280
4281
4282
4283
4284
4285
4286
4287
4288
4289
4290
4291
4292
4293
4294
4295
4296
4297
4298
4299
4300
4301
4302
4303
4304
4305
4306
4307
4308
4309
4310
4311
4312
4313
4314
4315
4316
4317
4318
4319
4320
4321
4322
4323
4324
4325
4326
4327
4328
4329
4330
4331
4332
4333
4334
4335
4336
4337
4338
4339
4340
4341
4342
4343
4344
4345
4346
4347
4348
4349
4350
4351
4352
4353
4354
4355
4356
4357
4358
4359
4360
4361
4362
4363
4364
4365
4366
4367
4368
4369
4370
4371
4372
4373
4374
4375
4376
4377
4378
4379
4380
4381
4382
4383
4384
4385
4386
4387
4388
4389
4390
4391
4392
4393
4394
4395
4396
4397
4398
4399
4400
4401
4402
4403
4404
4405
4406
4407
4408
4409
4410
4411
4412
4413
4414
4415
4416
4417
4418
4419
4420
4421
4422
4423
4424
4425
4426
4427
4428
4429
4430
4431
4432
4433
4434
4435
4436
4437
4438
4439
4440
4441
4442
4443
4444
4445
4446
4447
4448
4449
4450
4451
4452
4453
4454
4455
4456
4457
4458
4459
4460
4461
4462
4463
4464
4465
4466
4467
4468
4469
4470
4471
4472
4473
4474
4475
4476
4477
4478
4479
4480
4481
4482
4483
4484
4485
4486
4487
4488
4489
4490
4491
4492
4493
4494
4495
4496
4497
4498
4499
4500
4501
4502
4503
4504
4505
4506
4507
4508
4509
4510
4511
4512
4513
4514
4515
4516
4517
4518
4519
4520
4521
4522
4523
4524
4525
4526
4527
4528
4529
4530
4531
4532
4533
4534
4535
4536
4537
4538
4539
4540
4541
4542
4543
4544
4545
4546
4547
4548
4549
4550
4551
4552
4553
4554
4555
4556
4557
4558
4559
4560
4561
4562
4563
4564
4565
4566
4567
4568
4569
4570
4571
4572
4573
4574
4575
4576
4577
4578
4579
4580
4581
4582
4583
4584
4585
4586
4587
4588
4589
4590
4591
4592
4593
4594
4595
4596
4597
4598
4599
4600
4601
4602
4603
4604
4605
4606
4607
4608
4609
4610
4611
4612
4613
4614
4615
4616
4617
4618
4619
4620
4621
4622
4623
4624
4625
4626
4627
4628
4629
4630
4631
4632
4633
4634
4635
4636
4637
4638
4639
4640
4641
4642
4643
4644
4645
4646
4647
4648
4649
4650
4651
4652
4653
4654
4655
4656
4657
4658
4659
4660
4661
4662
4663
4664
4665
4666
4667
4668
4669
4670
4671
4672
4673
4674
4675
4676
4677
4678
4679
4680
4681
4682
4683
4684
4685
4686
4687
4688
4689
4690
4691
4692
4693
4694
4695
4696
4697
4698
4699
4700
4701
4702
4703
4704
4705
4706
4707
4708
4709
4710
4711
4712
4713
4714
4715
4716
4717
4718
4719
4720
4721
4722
4723
4724
4725
4726
4727
4728
4729
4730
4731
4732
4733
4734
4735
4736
4737
4738
4739
4740
4741
4742
4743
4744
4745
4746
4747
4748
4749
4750
4751
4752
4753
4754
4755
4756
4757
4758
4759
4760
4761
4762
4763
4764
4765
4766
4767
4768
4769
4770
4771
4772
4773
4774
4775
4776
4777
4778
4779
4780
4781
4782
4783
4784
4785
4786
4787
4788
4789
4790
4791
4792
4793
4794
4795
4796
4797
4798
4799
4800
4801
4802
4803
4804
4805
4806
4807
4808
4809
4810
4811
4812
4813
4814
4815
4816
4817
4818
4819
4820
4821
4822
4823
4824
4825
4826
4827
4828
4829
4830
4831
4832
4833
4834
4835
4836
4837
4838
4839
4840
4841
4842
4843
4844
4845
4846
4847
4848
4849
4850
4851
4852
4853
4854
4855
4856
4857
4858
4859
4860
4861
4862
4863
4864
4865
4866
4867
4868
4869
4870
4871
4872
4873
4874
4875
4876
4877
4878
4879
4880
4881
4882
4883
4884
4885
4886
4887
4888
4889
4890
4891
4892
4893
4894
4895
4896
4897
4898
4899
4900
4901
4902
4903
4904
4905
4906
4907
4908
4909
4910
4911
4912
4913
4914
4915
4916
4917
4918
4919
4920
4921
4922
4923
4924
4925
4926
4927
4928
4929
4930
4931
4932
4933
4934
4935
4936
4937
4938
4939
4940
4941
4942
4943
4944
4945
4946
4947
4948
4949
4950
4951
4952
4953
4954
4955
4956
4957
4958
4959
4960
4961
4962
4963
4964
4965
4966
4967
4968
4969
4970
4971
4972
4973
4974
4975
4976
4977
4978
4979
4980
4981
4982
4983
4984
4985
4986
4987
4988
4989
4990
4991
4992
4993
4994
4995
4996
4997
4998
4999
5000
5001
5002
5003
5004
5005
5006
5007
5008
5009
5010
5011
5012
5013
5014
5015
5016
5017
5018
5019
5020
5021
5022
5023
5024
5025
5026
5027
5028
5029
5030
5031
5032
5033
5034
5035
5036
5037
5038
5039
5040
5041
5042
5043
5044
5045
5046
5047
5048
5049
5050
5051
5052
5053
5054
5055
5056
5057
5058
5059
5060
5061
5062
5063
5064
5065
5066
5067
5068
5069
5070
5071
5072
5073
5074
5075
5076
5077
5078
5079
5080
5081
5082
5083
5084
5085
5086
5087
5088
5089
5090
5091
5092
5093
5094
5095
5096
5097
5098
5099
5100
5101
5102
5103
5104
5105
5106
5107
5108
5109
5110
5111
5112
5113
5114
5115
5116
5117
5118
5119
5120
5121
5122
5123
5124
5125
5126
5127
5128
5129
5130
5131
5132
5133
5134
5135
5136
5137
5138
5139
5140
5141
5142
5143
5144
5145
5146
5147
5148
5149
5150
5151
5152
5153
5154
5155
5156
5157
5158
5159
5160
5161
5162
5163
5164
5165
5166
5167
5168
5169
5170
5171
5172
5173
5174
5175
5176
5177
5178
5179
5180
5181
5182
5183
5184
5185
5186
5187
5188
5189
5190
5191
5192
5193
5194
5195
5196
5197
5198
5199
5200
5201
5202
5203
5204
5205
5206
5207
5208
5209
5210
5211
5212
5213
5214
5215
5216
5217
5218
5219
5220
5221
5222
5223
5224
5225
5226
5227
5228
5229
5230
5231
5232
5233
5234
5235
5236
5237
5238
5239
5240
5241
5242
5243
5244
5245
5246
5247
5248
5249
5250
5251
5252
5253
5254
5255
5256
5257
5258
5259
5260
5261
5262
5263
5264
5265
5266
5267
5268
5269
5270
5271
5272
5273
5274
5275
5276
5277
5278
5279
5280
5281
5282
5283
5284
5285
5286
5287
5288
5289
5290
5291
5292
5293
5294
5295
5296
5297
5298
5299
5300
5301
5302
5303
5304
5305
5306
5307
5308
5309
5310
5311
5312
5313
5314
5315
5316
5317
5318
5319
5320
5321
5322
5323
5324
5325
5326
5327
5328
5329
5330
5331
5332
5333
5334
5335
5336
5337
5338
5339
5340
5341
5342
5343
5344
5345
5346
5347
5348
5349
5350
5351
5352
5353
5354
5355
5356
5357
5358
5359
5360
5361
5362
5363
5364
5365
5366
5367
5368
5369
5370
5371
5372
5373
5374
5375
5376
5377
5378
5379
5380
5381
5382
5383
5384
5385
5386
5387
5388
5389
5390
5391
5392
5393
5394
5395
5396
5397
5398
5399
5400
5401
5402
5403
5404
5405
5406
5407
5408
5409
5410
5411
5412
5413
5414
5415
5416
5417
5418
5419
5420
5421
5422
5423
5424
5425
5426
5427
5428
5429
5430
5431
5432
5433
5434
5435
5436
5437
5438
5439
5440
5441
5442
5443
5444
5445
5446
5447
5448
5449
5450
5451
5452
5453
5454
5455
5456
5457
5458
5459
5460
5461
5462
5463
5464
5465
5466
5467
5468
5469
5470
5471
5472
5473
5474
5475
5476
5477
5478
5479
5480
5481
5482
5483
5484
5485
5486
5487
5488
5489
5490
5491
5492
5493
5494
5495
5496
5497
5498
5499
5500
5501
5502
5503
5504
5505
5506
5507
5508
5509
5510
5511
5512
5513
5514
5515
5516
5517
5518
5519
5520
5521
5522
5523
5524
5525
5526
5527
5528
5529
5530
5531
5532
5533
5534
5535
5536
5537
5538
5539
5540
5541
5542
5543
5544
5545
5546
5547
5548
5549
5550
5551
5552
5553
5554
5555
5556
5557
5558
5559
5560
5561
5562
5563
5564
5565
5566
5567
5568
5569
5570
5571
5572
5573
5574
5575
5576
5577
5578
5579
5580
5581
5582
5583
5584
5585
5586
5587
5588
5589
5590
5591
5592
5593
5594
5595
5596
5597
5598
5599
5600
5601
5602
5603
5604
5605
5606
5607
5608
5609
5610
5611
5612
5613
5614
5615
5616
5617
5618
5619
5620
5621
5622
5623
5624
5625
5626
5627
5628
5629
5630
5631
5632
5633
5634
5635
5636
5637
5638
5639
5640
5641
5642
5643
5644
5645
5646
5647
5648
5649
5650
5651
5652
5653
5654
5655
5656
5657
5658
5659
5660
5661
5662
5663
5664
5665
5666
5667
5668
5669
5670
5671
5672
5673
5674
5675
5676
5677
5678
5679
5680
5681
5682
5683
5684
5685
5686
5687
5688
5689
5690
5691
5692
5693
5694
5695
5696
5697
5698
5699
5700
5701
5702
5703
5704
5705
5706
5707
5708
5709
5710
5711
5712
5713
5714
5715
5716
5717
5718
5719
5720
5721
5722
5723
5724
5725
5726
5727
5728
5729
5730
5731
5732
5733
5734
5735
5736
5737
5738
5739
5740
5741
5742
5743
5744
5745
5746
5747
5748
5749
5750
5751
5752
5753
5754
5755
5756
5757
5758
5759
5760
5761
5762
5763
5764
5765
5766
5767
5768
5769
5770
5771
5772
5773
5774
5775
5776
5777
5778
5779
5780
5781
5782
5783
5784
5785
5786
5787
5788
5789
5790
5791
5792
5793
5794
5795
5796
5797
5798
5799
5800
5801
5802
5803
5804
5805
5806
5807
5808
5809
5810
5811
5812
5813
5814
5815
5816
5817
5818
5819
5820
5821
5822
5823
5824
5825
5826
5827
5828
5829
5830
5831
5832
5833
5834
5835
5836
5837
5838
5839
5840
5841
5842
5843
5844
5845
5846
5847
5848
5849
5850
5851
5852
5853
5854
5855
5856
5857
5858
5859
5860
5861
5862
5863
5864
5865
5866
5867
5868
5869
5870
5871
5872
5873
5874
5875
5876
5877
5878
5879
5880
5881
5882
5883
5884
5885
5886
5887
5888
5889
5890
5891
5892
5893
5894
5895
5896
5897
5898
5899
5900
5901
5902
5903
5904
5905
5906
5907
5908
5909
5910
5911
5912
5913
5914
5915
5916
5917
5918
5919
5920
5921
5922
5923
5924
5925
5926
5927
5928
5929
5930
5931
5932
5933
5934
5935
5936
5937
5938
5939
5940
5941
5942
5943
5944
5945
5946
5947
5948
5949
5950
5951
5952
5953
5954
5955
5956
5957
5958
5959
5960
5961
5962
5963
5964
5965
5966
5967
5968
5969
5970
5971
5972
5973
5974
5975
5976
5977
5978
5979
5980
5981
5982
5983
5984
5985
5986
5987
5988
5989
5990
5991
5992
5993
5994
5995
5996
5997
5998
5999
6000
6001
6002
6003
6004
6005
6006
6007
6008
6009
6010
6011
6012
6013
6014
6015
6016
6017
6018
6019
6020
6021
6022
6023
6024
6025
6026
6027
6028
6029
6030
6031
6032
6033
6034
6035
6036
6037
6038
6039
6040
6041
6042
6043
6044
6045
6046
6047
6048
6049
6050
6051
6052
6053
6054
6055
6056
6057
6058
6059
6060
6061
6062
6063
6064
6065
6066
6067
6068
6069
6070
6071
6072
6073
6074
6075
6076
6077
6078
6079
6080
6081
6082
6083
6084
6085
6086
6087
6088
6089
6090
6091
6092
6093
6094
6095
6096
6097
6098
6099
6100
6101
6102
6103
6104
6105
6106
6107
6108
6109
6110
6111
6112
6113
6114
6115
6116
6117
6118
6119
6120
6121
6122
6123
6124
6125
6126
6127
6128
6129
6130
6131
6132
6133
6134
6135
6136
6137
6138
6139
6140
6141
6142
6143
6144
6145
6146
6147
6148
6149
6150
6151
6152
6153
6154
6155
6156
6157
6158
6159
6160
6161
6162
6163
6164
6165
6166
6167
6168
6169
6170
6171
6172
6173
6174
6175
6176
6177
6178
6179
6180
6181
6182
6183
6184
6185
6186
6187
6188
6189
6190
6191
6192
6193
6194
6195
6196
6197
6198
6199
6200
6201
6202
6203
6204
6205
6206
6207
6208
6209
6210
6211
6212
6213
6214
6215
6216
6217
6218
6219
6220
6221
6222
6223
6224
6225
6226
6227
6228
6229
6230
6231
6232
6233
6234
6235
6236
6237
6238
6239
6240
6241
6242
6243
6244
6245
6246
6247
6248
6249
6250
6251
6252
6253
6254
6255
6256
6257
6258
6259
6260
6261
6262
6263
6264
6265
6266
6267
6268
6269
6270
6271
6272
6273
6274
6275
6276
6277
6278
6279
6280
6281
6282
6283
6284
6285
6286
6287
6288
6289
6290
6291
6292
6293
6294
6295
6296
6297
6298
6299
6300
6301
6302
6303
6304
6305
6306
6307
6308
6309
6310
6311
6312
6313
6314
6315
6316
6317
6318
6319
6320
6321
6322
6323
6324
6325
6326
6327
6328
6329
6330
6331
6332
6333
6334
6335
6336
6337
6338
6339
6340
6341
6342
6343
6344
6345
6346
6347
6348
6349
6350
6351
6352
6353
6354
6355
6356
6357
6358
6359
6360
6361
6362
6363
6364
6365
6366
6367
6368
6369
6370
6371
6372
6373
6374
6375
6376
6377
6378
6379
6380
6381
6382
6383
6384
6385
6386
6387
6388
6389
6390
6391
6392
6393
6394
6395
6396
6397
6398
6399
6400
6401
6402
6403
6404
6405
6406
6407
6408
6409
6410
6411
6412
6413
6414
6415
6416
6417
6418
6419
6420
6421
6422
6423
6424
6425
6426
6427
6428
6429
6430
6431
6432
6433
6434
6435
6436
6437
6438
6439
6440
6441
6442
6443
6444
6445
6446
6447
6448
6449
6450
6451
6452
6453
6454
6455
6456
6457
6458
6459
6460
6461
6462
6463
6464
6465
6466
6467
6468
6469
6470
6471
6472
6473
6474
6475
6476
6477
6478
6479
6480
6481
6482
6483
6484
6485
6486
6487
6488
6489
6490
6491
6492
6493
6494
6495
6496
6497
6498
6499
6500
6501
6502
6503
6504
6505
6506
6507
6508
6509
6510
6511
6512
6513
6514
6515
6516
6517
6518
6519
6520
6521
6522
6523
6524
6525
6526
6527
6528
6529
6530
6531
6532
6533
6534
6535
6536
6537
6538
6539
6540
6541
6542
6543
6544
6545
6546
6547
6548
6549
6550
6551
6552
6553
6554
6555
6556
6557
6558
6559
6560
6561
6562
6563
6564
6565
6566
6567
6568
6569
6570
6571
6572
6573
6574
6575
6576
6577
6578
6579
6580
6581
6582
6583
6584
6585
6586
6587
6588
6589
6590
6591
6592
6593
6594
6595
6596
6597
6598
6599
6600
6601
6602
6603
6604
6605
6606
6607
6608
6609
6610
6611
6612
6613
6614
6615
6616
6617
6618
6619
6620
6621
6622
6623
6624
6625
6626
6627
6628
6629
6630
6631
6632
6633
6634
6635
6636
6637
6638
6639
6640
6641
6642
6643
6644
6645
6646
6647
6648
6649
6650
6651
6652
6653
6654
6655
6656
6657
6658
6659
6660
6661
6662
6663
6664
6665
6666
6667
6668
6669
6670
6671
6672
6673
6674
6675
6676
6677
6678
6679
6680
6681
6682
6683
6684
6685
6686
6687
6688
6689
6690
6691
6692
6693
6694
6695
6696
6697
6698
6699
6700
6701
6702
6703
6704
6705
6706
6707
6708
6709
6710
6711
6712
6713
6714
6715
6716
6717
6718
6719
6720
6721
6722
6723
6724
6725
6726
6727
6728
6729
6730
6731
6732
6733
6734
6735
6736
6737
6738
6739
6740
6741
6742
6743
6744
6745
6746
6747
6748
6749
6750
6751
6752
6753
6754
6755
6756
6757
6758
6759
6760
6761
6762
6763
6764
6765
6766
6767
6768
6769
6770
6771
6772
6773
6774
6775
6776
6777
6778
6779
6780
6781
6782
6783
6784
6785
6786
6787
6788
6789
6790
6791
6792
6793
6794
6795
6796
6797
6798
6799
6800
6801
6802
6803
6804
6805
6806
6807
6808
6809
6810
6811
6812
6813
6814
6815
6816
6817
6818
6819
6820
6821
6822
6823
6824
6825
6826
6827
6828
6829
6830
6831
6832
6833
6834
6835
6836
6837
6838
6839
6840
6841
6842
6843
6844
6845
6846
6847
6848
6849
6850
6851
6852
6853
6854
6855
6856
6857
6858
6859
6860
6861
6862
6863
6864
6865
6866
6867
6868
6869
6870
6871
6872
6873
6874
6875
6876
6877
6878
6879
6880
6881
6882
6883
6884
6885
6886
6887
6888
6889
6890
6891
6892
6893
6894
6895
6896
6897
6898
6899
6900
6901
6902
6903
6904
6905
6906
6907
6908
6909
6910
6911
6912
6913
6914
6915
6916
6917
6918
6919
6920
6921
6922
6923
6924
6925
6926
6927
6928
6929
6930
6931
6932
6933
6934
6935
6936
6937
6938
6939
6940
6941
6942
6943
6944
6945
6946
6947
6948
6949
6950
6951
6952
6953
6954
6955
6956
6957
6958
6959
6960
6961
6962
6963
6964
6965
6966
6967
6968
6969
6970
6971
6972
6973
6974
6975
6976
6977
6978
6979
6980
6981
6982
6983
6984
6985
6986
6987
6988
6989
6990
6991
6992
6993
6994
6995
6996
6997
6998
6999
7000
7001
7002
7003
7004
7005
7006
7007
7008
7009
7010
7011
7012
7013
7014
7015
7016
7017
7018
7019
7020
7021
7022
7023
7024
7025
7026
7027
7028
7029
7030
7031
7032
7033
7034
7035
7036
7037
7038
7039
7040
7041
7042
7043
7044
7045
7046
7047
7048
7049
7050
7051
7052
7053
7054
7055
7056
7057
7058
7059
7060
7061
7062
7063
7064
7065
7066
7067
7068
7069
7070
7071
7072
7073
7074
7075
7076
7077
7078
7079
7080
7081
7082
7083
7084
7085
7086
7087
7088
7089
7090
7091
7092
7093
7094
7095
7096
7097
7098
7099
7100
7101
7102
7103
7104
7105
7106
7107
7108
7109
7110
7111
7112
7113
7114
7115
7116
7117
7118
7119
7120
7121
7122
7123
7124
7125
7126
7127
7128
7129
7130
7131
7132
7133
7134
7135
7136
7137
7138
7139
7140
7141
7142
7143
7144
7145
7146
7147
7148
7149
7150
7151
7152
7153
7154
7155
7156
7157
7158
7159
7160
7161
7162
7163
7164
7165
7166
7167
7168
7169
7170
7171
7172
7173
7174
7175
7176
7177
7178
7179
7180
7181
7182
7183
7184
7185
7186
7187
7188
7189
7190
7191
7192
7193
7194
7195
7196
7197
7198
7199
7200
7201
7202
7203
7204
7205
7206
7207
7208
7209
7210
7211
7212
7213
7214
7215
7216
7217
7218
7219
7220
7221
7222
7223
7224
7225
7226
7227
7228
7229
7230
7231
7232
7233
7234
7235
7236
7237
7238
7239
7240
7241
7242
7243
7244
7245
7246
7247
7248
7249
7250
7251
7252
7253
7254
7255
7256
7257
7258
7259
7260
7261
7262
7263
7264
7265
7266
7267
7268
7269
7270
7271
7272
7273
7274
7275
7276
7277
7278
7279
7280
7281
7282
7283
7284
7285
7286
7287
7288
7289
7290
7291
7292
7293
7294
7295
7296
7297
7298
7299
7300
7301
7302
7303
7304
7305
7306
7307
7308
7309
7310
7311
7312
7313
7314
7315
7316
7317
7318
7319
7320
7321
7322
7323
7324
7325
7326
7327
7328
7329
7330
7331
7332
7333
7334
7335
7336
7337
7338
7339
7340
7341
7342
7343
7344
7345
7346
7347
7348
7349
7350
7351
7352
7353
7354
7355
7356
7357
7358
7359
7360
7361
7362
7363
7364
7365
7366
7367
7368
7369
7370
7371
7372
7373
7374
7375
7376
7377
7378
7379
7380
7381
7382
7383
7384
7385
7386
7387
7388
7389
7390
7391
7392
7393
7394
7395
7396
7397
7398
7399
7400
7401
7402
7403
7404
7405
7406
7407
7408
7409
7410
7411
7412
7413
7414
7415
7416
7417
7418
7419
7420
7421
7422
7423
7424
7425
7426
7427
7428
7429
7430
7431
7432
7433
7434
7435
7436
7437
7438
7439
7440
7441
7442
7443
7444
7445
7446
7447
7448
7449
7450
7451
7452
7453
7454
7455
7456
7457
7458
7459
7460
7461
7462
7463
7464
7465
7466
7467
7468
7469
7470
7471
7472
7473
7474
7475
7476
7477
7478
7479
7480
7481
7482
7483
7484
7485
7486
7487
7488
7489
7490
7491
7492
7493
7494
7495
7496
7497
7498
7499
7500
7501
7502
7503
7504
7505
7506
7507
7508
7509
7510
7511
7512
7513
7514
7515
7516
7517
7518
7519
7520
7521
7522
7523
7524
7525
7526
7527
7528
7529
7530
7531
7532
7533
7534
7535
7536
7537
7538
7539
7540
7541
7542
7543
7544
7545
7546
7547
7548
7549
7550
7551
7552
7553
7554
7555
7556
7557
7558
7559
7560
7561
7562
7563
7564
7565
7566
7567
7568
7569
7570
7571
7572
7573
7574
7575
7576
7577
7578
7579
7580
7581
7582
7583
7584
7585
7586
7587
7588
7589
7590
7591
7592
7593
7594
7595
7596
7597
7598
7599
7600
7601
7602
7603
7604
7605
7606
7607
7608
7609
7610
7611
7612
7613
7614
7615
7616
7617
7618
7619
7620
7621
7622
7623
7624
7625
7626
7627
7628
7629
7630
7631
7632
7633
7634
7635
7636
7637
7638
7639
7640
7641
7642
7643
7644
7645
7646
7647
7648
7649
7650
7651
7652
7653
7654
7655
7656
7657
7658
7659
7660
7661
7662
7663
7664
7665
7666
7667
7668
7669
7670
7671
7672
7673
7674
7675
7676
7677
7678
7679
7680
7681
7682
7683
7684
7685
7686
7687
7688
7689
7690
7691
7692
7693
7694
7695
7696
7697
7698
7699
7700
7701
7702
7703
7704
7705
7706
7707
7708
7709
7710
7711
7712
7713
7714
7715
7716
7717
7718
7719
7720
7721
7722
7723
7724
7725
7726
7727
7728
7729
7730
7731
7732
7733
7734
7735
7736
7737
7738
7739
7740
7741
7742
7743
7744
7745
7746
7747
7748
7749
7750
7751
7752
7753
7754
7755
7756
7757
7758
7759
7760
7761
7762
7763
7764
7765
7766
7767
7768
7769
7770
7771
7772
7773
7774
7775
7776
7777
7778
7779
7780
7781
7782
7783
7784
7785
7786
7787
7788
7789
7790
7791
7792
7793
7794
7795
7796
7797
7798
7799
7800
7801
7802
7803
7804
7805
7806
7807
7808
7809
7810
7811
7812
7813
7814
7815
7816
7817
7818
7819
7820
7821
7822
7823
7824
7825
7826
7827
7828
7829
7830
7831
7832
7833
7834
7835
7836
7837
7838
7839
7840
7841
7842
7843
7844
7845
7846
7847
7848
7849
7850
7851
7852
7853
7854
7855
7856
7857
7858
7859
7860
7861
7862
7863
7864
7865
7866
7867
7868
7869
7870
7871
7872
7873
7874
7875
7876
7877
7878
7879
7880
7881
7882
7883
7884
7885
7886
7887
7888
7889
7890
7891
7892
7893
7894
7895
7896
7897
7898
7899
7900
7901
7902
7903
7904
7905
7906
7907
7908
7909
7910
7911
7912
7913
7914
7915
7916
7917
7918
7919
7920
7921
7922
7923
7924
7925
7926
7927
7928
7929
7930
7931
7932
7933
7934
7935
7936
7937
7938
7939
7940
7941
7942
7943
7944
7945
7946
7947
7948
7949
7950
7951
7952
7953
7954
7955
7956
7957
7958
7959
7960
7961
7962
7963
7964
7965
7966
7967
7968
7969
7970
7971
7972
7973
7974
7975
7976
7977
7978
7979
7980
7981
7982
7983
7984
7985
7986
7987
7988
7989
7990
7991
7992
7993
7994
7995
7996
7997
7998
7999
8000
8001
8002
8003
8004
8005
8006
8007
8008
8009
8010
8011
8012
8013
8014
8015
8016
8017
8018
8019
8020
8021
8022
8023
8024
8025
8026
8027
8028
8029
8030
8031
8032
8033
8034
8035
8036
8037
8038
8039
8040
8041
8042
8043
8044
8045
8046
8047
8048
8049
8050
8051
8052
8053
8054
8055
8056
8057
8058
8059
8060
8061
8062
8063
8064
8065
8066
8067
8068
8069
8070
8071
8072
8073
8074
8075
8076
8077
8078
8079
8080
8081
8082
8083
8084
8085
8086
8087
8088
8089
8090
8091
8092
8093
8094
8095
8096
8097
8098
8099
8100
8101
8102
8103
8104
8105
8106
8107
8108
8109
8110
8111
8112
8113
8114
8115
8116
8117
8118
8119
8120
8121
8122
8123
8124
8125
8126
8127
8128
8129
8130
8131
8132
8133
8134
8135
8136
8137
8138
8139
8140
8141
8142
8143
8144
8145
8146
8147
8148
8149
8150
8151
8152
8153
8154
8155
8156
8157
8158
8159
8160
8161
8162
8163
8164
8165
8166
8167
8168
8169
8170
8171
8172
8173
8174
8175
8176
8177
8178
8179
8180
8181
8182
8183
8184
8185
8186
8187
8188
8189
8190
8191
8192
8193
8194
8195
8196
8197
8198
8199
8200
8201
8202
8203
8204
8205
8206
8207
8208
8209
8210
8211
8212
8213
8214
8215
8216
8217
8218
8219
8220
8221
8222
8223
8224
8225
8226
8227
8228
8229
8230
8231
8232
8233
8234
8235
8236
8237
8238
8239
8240
8241
8242
8243
8244
8245
8246
8247
8248
8249
8250
8251
8252
8253
8254
8255
8256
8257
8258
8259
8260
8261
8262
8263
8264
8265
8266
8267
8268
8269
8270
8271
8272
8273
8274
8275
8276
8277
8278
8279
8280
8281
8282
8283
8284
8285
8286
8287
8288
8289
8290
8291
8292
8293
8294
8295
8296
8297
8298
8299
8300
8301
8302
8303
8304
8305
8306
8307
8308
8309
8310
8311
8312
8313
8314
8315
8316
8317
8318
8319
8320
8321
8322
8323
8324
8325
8326
8327
8328
8329
8330
8331
8332
8333
8334
8335
8336
8337
8338
8339
8340
8341
8342
8343
8344
8345
8346
8347
8348
8349
8350
8351
8352
8353
8354
8355
8356
8357
8358
8359
8360
8361
8362
8363
8364
8365
8366
8367
8368
8369
8370
8371
8372
8373
8374
8375
8376
8377
8378
8379
8380
8381
8382
8383
8384
8385
8386
8387
8388
8389
8390
8391
8392
8393
8394
8395
8396
8397
8398
8399
8400
8401
8402
8403
8404
8405
8406
8407
8408
8409
8410
8411
8412
8413
8414
8415
8416
8417
8418
8419
8420
8421
8422
8423
8424
8425
8426
8427
8428
8429
8430
8431
8432
8433
8434
8435
8436
8437
8438
8439
8440
8441
8442
8443
8444
8445
8446
8447
8448
8449
8450
8451
8452
8453
8454
8455
8456
8457
8458
8459
8460
8461
8462
8463
8464
8465
8466
8467
8468
8469
8470
8471
8472
8473
8474
8475
8476
8477
8478
8479
8480
8481
8482
8483
8484
8485
8486
8487
8488
8489
8490
8491
8492
8493
8494
8495
8496
8497
8498
8499
8500
8501
8502
8503
8504
8505
8506
8507
8508
8509
8510
8511
8512
8513
8514
8515
8516
8517
8518
8519
8520
8521
8522
8523
8524
8525
8526
8527
8528
8529
8530
8531
8532
8533
8534
8535
8536
8537
8538
8539
8540
8541
8542
8543
8544
8545
8546
8547
8548
8549
8550
8551
8552
8553
8554
8555
8556
8557
8558
8559
8560
8561
8562
8563
8564
8565
8566
8567
8568
8569
8570
8571
8572
8573
8574
8575
8576
8577
8578
8579
8580
8581
8582
8583
8584
8585
8586
8587
8588
8589
8590
8591
8592
8593
8594
8595
8596
8597
8598
8599
8600
8601
8602
8603
8604
8605
8606
8607
8608
8609
8610
8611
8612
8613
8614
8615
8616
8617
8618
8619
8620
8621
8622
8623
8624
8625
8626
8627
8628
8629
8630
8631
8632
8633
8634
8635
8636
8637
8638
8639
8640
8641
8642
8643
8644
8645
8646
8647
8648
8649
8650
8651
8652
8653
8654
8655
8656
8657
8658
8659
8660
8661
8662
8663
8664
8665
8666
8667
8668
8669
8670
8671
8672
8673
8674
8675
8676
8677
8678
8679
8680
8681
8682
8683
8684
8685
8686
8687
8688
8689
8690
8691
8692
8693
8694
8695
8696
8697
8698
8699
8700
8701
8702
8703
8704
8705
8706
8707
8708
8709
8710
8711
8712
8713
8714
8715
8716
8717
8718
8719
8720
8721
8722
8723
8724
8725
8726
8727
8728
8729
8730
8731
8732
8733
8734
8735
8736
8737
8738
8739
8740
8741
8742
8743
8744
8745
8746
8747
8748
8749
8750
8751
8752
8753
8754
8755
8756
8757
8758
8759
8760
8761
8762
8763
8764
8765
8766
8767
8768
8769
8770
8771
8772
8773
8774
8775
8776
8777
8778
8779
8780
8781
8782
8783
8784
8785
8786
8787
8788
8789
8790
8791
8792
8793
8794
8795
8796
8797
8798
8799
8800
8801
8802
8803
8804
8805
8806
8807
8808
8809
8810
8811
8812
8813
8814
8815
8816
8817
8818
8819
8820
8821
8822
8823
8824
8825
8826
8827
8828
8829
8830
8831
8832
8833
8834
8835
8836
8837
8838
8839
8840
8841
8842
8843
8844
8845
8846
8847
8848
8849
8850
8851
8852
8853
8854
8855
8856
8857
8858
8859
8860
8861
8862
8863
8864
8865
8866
8867
8868
8869
8870
8871
8872
8873
8874
8875
8876
8877
8878
8879
8880
8881
8882
8883
8884
8885
8886
8887
8888
8889
8890
8891
8892
8893
8894
8895
8896
8897
8898
8899
8900
8901
8902
8903
8904
8905
8906
8907
8908
8909
8910
8911
8912
8913
8914
8915
8916
8917
8918
8919
8920
8921
8922
8923
8924
8925
8926
8927
8928
8929
8930
8931
8932
8933
8934
8935
8936
8937
8938
8939
8940
8941
8942
8943
8944
8945
8946
8947
8948
8949
8950
8951
8952
8953
8954
8955
8956
8957
8958
8959
8960
8961
8962
8963
8964
8965
8966
8967
8968
8969
8970
8971
8972
8973
8974
8975
8976
8977
8978
8979
8980
8981
8982
8983
8984
8985
8986
8987
8988
8989
8990
8991
8992
8993
8994
8995
8996
8997
8998
8999
9000
9001
9002
9003
9004
9005
9006
9007
9008
9009
9010
9011
9012
9013
9014
9015
9016
9017
9018
9019
9020
9021
9022
9023
9024
9025
9026
9027
9028
9029
9030
9031
9032
9033
9034
9035
9036
9037
9038
9039
9040
9041
9042
9043
9044
9045
9046
9047
9048
9049
9050
9051
9052
9053
9054
9055
9056
9057
9058
9059
9060
9061
9062
9063
9064
9065
9066
9067
9068
9069
9070
9071
9072
9073
9074
9075
9076
9077
9078
9079
9080
9081
9082
9083
9084
9085
9086
9087
9088
9089
9090
9091
9092
9093
9094
9095
9096
9097
9098
9099
9100
9101
9102
9103
9104
9105
9106
9107
9108
9109
9110
9111
9112
9113
9114
9115
9116
9117
9118
9119
9120
9121
9122
9123
9124
9125
9126
9127
9128
9129
9130
9131
9132
9133
9134
9135
9136
9137
9138
9139
9140
9141
9142
9143
9144
9145
9146
9147
9148
9149
9150
9151
9152
9153
9154
9155
9156
9157
9158
9159
9160
9161
9162
9163
9164
9165
9166
9167
9168
9169
9170
9171
9172
9173
9174
9175
9176
9177
9178
9179
9180
9181
9182
9183
9184
9185
9186
9187
9188
9189
9190
9191
9192
9193
9194
9195
9196
9197
9198
9199
9200
9201
9202
9203
9204
9205
9206
9207
9208
9209
9210
9211
9212
9213
9214
9215
9216
9217
9218
9219
9220
9221
9222
9223
9224
9225
9226
9227
9228
9229
9230
9231
9232
9233
9234
9235
9236
9237
9238
9239
9240
9241
9242
9243
9244
9245
9246
9247
9248
9249
9250
9251
9252
9253
9254
9255
9256
9257
9258
9259
9260
9261
9262
9263
9264
9265
9266
9267
9268
9269
9270
9271
9272
9273
9274
9275
9276
9277
9278
9279
9280
9281
9282
9283
9284
9285
9286
9287
9288
9289
9290
9291
9292
9293
9294
9295
9296
9297
9298
9299
9300
9301
9302
9303
9304
9305
9306
9307
9308
9309
9310
9311
9312
9313
9314
9315
9316
9317
9318
9319
9320
9321
9322
9323
9324
9325
9326
9327
9328
9329
9330
9331
9332
9333
9334
9335
9336
9337
9338
9339
9340
9341
9342
9343
9344
9345
9346
9347
9348
9349
9350
9351
9352
9353
9354
9355
9356
9357
9358
9359
9360
9361
9362
9363
9364
9365
9366
9367
9368
9369
9370
9371
9372
9373
9374
9375
9376
9377
9378
9379
9380
9381
9382
9383
9384
9385
9386
9387
9388
9389
9390
9391
9392
9393
9394
9395
9396
9397
9398
9399
9400
9401
9402
9403
9404
9405
9406
9407
9408
9409
9410
9411
9412
9413
9414
9415
9416
9417
9418
9419
9420
9421
9422
9423
9424
9425
9426
9427
9428
9429
9430
9431
9432
9433
9434
9435
9436
9437
9438
9439
9440
9441
9442
9443
9444
9445
9446
9447
9448
9449
9450
9451
9452
9453
9454
9455
9456
9457
9458
9459
9460
9461
9462
9463
9464
9465
9466
9467
9468
9469
9470
9471
9472
9473
9474
9475
9476
9477
9478
9479
9480
9481
9482
9483
9484
9485
9486
9487
9488
9489
9490
9491
9492
9493
9494
9495
9496
9497
9498
9499
9500
9501
9502
9503
9504
9505
9506
9507
9508
9509
9510
9511
9512
9513
9514
9515
9516
9517
9518
9519
9520
9521
9522
9523
9524
9525
9526
9527
9528
9529
9530
9531
9532
9533
9534
9535
9536
9537
9538
9539
9540
9541
9542
9543
9544
9545
9546
9547
9548
9549
9550
9551
9552
9553
9554
9555
9556
9557
9558
9559
9560
9561
9562
9563
9564
9565
9566
9567
9568
9569
9570
9571
9572
9573
9574
9575
9576
9577
9578
9579
9580
9581
9582
9583
9584
9585
9586
9587
9588
9589
9590
9591
9592
9593
9594
9595
9596
9597
9598
9599
9600
9601
9602
9603
9604
9605
9606
9607
9608
9609
9610
9611
9612
9613
9614
9615
9616
9617
9618
9619
9620
9621
9622
9623
9624
9625
9626
9627
9628
9629
9630
9631
9632
9633
9634
9635
9636
9637
9638
9639
9640
9641
9642
9643
9644
9645
9646
9647
9648
9649
9650
9651
9652
9653
9654
9655
9656
9657
9658
9659
9660
9661
9662
9663
9664
9665
9666
9667
9668
9669
9670
9671
9672
9673
9674
9675
9676
9677
9678
9679
9680
9681
9682
9683
9684
9685
9686
9687
9688
9689
9690
9691
9692
9693
9694
9695
9696
9697
9698
9699
9700
9701
9702
9703
9704
9705
9706
9707
9708
9709
9710
9711
9712
9713
9714
9715
9716
9717
9718
9719
9720
9721
9722
9723
9724
9725
9726
9727
9728
9729
9730
9731
9732
9733
9734
9735
9736
9737
9738
9739
9740
9741
9742
9743
9744
9745
9746
9747
9748
9749
9750
9751
9752
9753
9754
9755
9756
9757
9758
9759
9760
9761
9762
9763
9764
9765
9766
9767
9768
9769
9770
9771
9772
9773
9774
9775
9776
9777
9778
9779
9780
9781
9782
9783
9784
9785
9786
9787
9788
9789
9790
9791
9792
9793
9794
9795
9796
9797
9798
9799
9800
9801
9802
9803
9804
9805
9806
9807
9808
9809
9810
9811
9812
9813
9814
9815
9816
9817
9818
9819
9820
9821
9822
9823
9824
9825
9826
9827
9828
9829
9830
9831
9832
9833
9834
9835
9836
9837
9838
9839
9840
9841
9842
9843
9844
9845
9846
9847
9848
9849
9850
9851
9852
9853
9854
9855
9856
9857
9858
9859
9860
9861
9862
9863
9864
9865
9866
9867
9868
9869
9870
9871
9872
9873
9874
9875
9876
9877
9878
9879
9880
9881
9882
9883
9884
9885
9886
9887
9888
9889
9890
9891
9892
9893
9894
9895
9896
9897
9898
9899
9900
9901
9902
9903
9904
9905
9906
9907
9908
9909
9910
9911
9912
9913
9914
9915
9916
9917
9918
9919
9920
9921
9922
9923
9924
9925
9926
9927
9928
9929
9930
9931
9932
9933
9934
9935
9936
9937
9938
9939
9940
9941
9942
9943
9944
9945
9946
9947
9948
9949
9950
9951
9952
9953
9954
9955
9956
9957
9958
9959
9960
9961
9962
9963
9964
9965
9966
9967
9968
9969
9970
9971
9972
9973
9974
9975
9976
9977
9978
9979
9980
9981
9982
9983
9984
9985
9986
9987
9988
9989
9990
9991
9992
9993
9994
9995
9996
9997
9998
9999
10000
10001
10002
10003
10004
10005
10006
10007
10008
10009
10010
10011
10012
10013
10014
10015
10016
10017
10018
10019
10020
10021
10022
10023
10024
10025
10026
10027
10028
10029
10030
10031
10032
10033
10034
10035
10036
10037
10038
10039
10040
10041
10042
10043
10044
10045
10046
10047
10048
10049
10050
10051
10052
10053
10054
10055
10056
10057
10058
10059
10060
10061
10062
10063
10064
10065
10066
10067
10068
10069
10070
10071
10072
10073
10074
10075
10076
10077
10078
10079
10080
10081
10082
10083
10084
10085
10086
10087
10088
10089
10090
10091
10092
10093
10094
10095
10096
10097
10098
10099
10100
10101
10102
10103
10104
10105
10106
10107
10108
10109
10110
10111
10112
10113
10114
10115
10116
10117
10118
10119
10120
10121
10122
10123
10124
10125
10126
10127
10128
10129
10130
10131
10132
10133
10134
10135
10136
10137
10138
10139
10140
10141
10142
10143
10144
10145
10146
10147
10148
10149
10150
10151
10152
10153
10154
10155
10156
10157
10158
10159
10160
10161
10162
10163
10164
10165
10166
10167
10168
10169
10170
10171
10172
10173
10174
10175
10176
10177
10178
10179
10180
10181
10182
10183
10184
10185
10186
10187
10188
10189
10190
10191
10192
10193
10194
10195
10196
10197
10198
10199
10200
10201
10202
10203
10204
10205
10206
10207
10208
10209
10210
10211
10212
10213
10214
10215
10216
10217
10218
10219
10220
10221
10222
10223
10224
10225
10226
10227
10228
10229
10230
10231
10232
10233
10234
10235
10236
10237
10238
10239
10240
10241
|
+++++++++++
Python News
+++++++++++
What's New in Python 3.4.4rc1?
==============================
Release date: tba
Core and Builtins
-----------------
- Issue #24891: Fix a race condition at Python startup if the file descriptor
of stdin (0), stdout (1) or stderr (2) is closed while Python is creating
sys.stdin, sys.stdout and sys.stderr objects. These attributes are now set
to None if the creation of the object failed, instead of raising an OSError
exception. Initial patch written by Marco Paolini.
- Issue #21167: NAN operations are now handled correctly when python is
compiled with ICC even if -fp-model strict is not specified.
- Issue #4395: Better testing and documentation of binary operators.
Patch by Martin Panter.
- Issue #24467: Fixed possible buffer over-read in bytearray. The bytearray
object now always allocates place for trailing null byte and it's buffer now
is always null-terminated.
- Issue #24115: Update uses of PyObject_IsTrue(), PyObject_Not(),
PyObject_IsInstance(), PyObject_RichCompareBool() and _PyDict_Contains()
to check for and handle errors correctly.
- Issue #24257: Fixed system error in the comparison of faked
types.SimpleNamespace.
- Issue #22939: Fixed integer overflow in iterator object. Patch by
Clement Rouault.
- Issue #23985: Fix a possible buffer overrun when deleting a slice from
the front of a bytearray and then appending some other bytes data.
- Issue #24102: Fixed exception type checking in standard error handlers.
- Issue #23757: PySequence_Tuple() incorrectly called the concrete list API
when the data was a list subclass.
- Issue #24407: Fix crash when dict is mutated while being updated.
- Issue #24096: Make warnings.warn_explicit more robust against mutation of the
warnings.filters list.
- Issue #23996: Avoid a crash when a delegated generator raises an
unnormalized StopIteration exception. Patch by Stefan Behnel.
- Issue #24022: Fix tokenizer crash when processing undecodable source code.
- Issue #23309: Avoid a deadlock at shutdown if a daemon thread is aborted
while it is holding a lock to a buffered I/O object, and the main thread
tries to use the same I/O object (typically stdout or stderr). A fatal
error is emitted instead.
- Issue #22977: Fixed formatting Windows error messages on Wine.
Patch by Martin Panter.
- Issue #23803: Fixed str.partition() and str.rpartition() when a separator
is wider then partitioned string.
- Issue #23192: Fixed generator lambdas. Patch by Bruno Cauet.
- Issue #23629: Fix the default __sizeof__ implementation for variable-sized
objects.
- Issue #24044: Fix possible null pointer dereference in list.sort in out of
memory conditions.
- Issue #21354: PyCFunction_New function is exposed by python DLL again.
- Issue #23812: Fix asyncio.Queue.get() to avoid loosing items on cancellation.
Patch by Gustavo J. A. M. Carneiro.
Library
-------
- Issue #25203: Failed readline.set_completer_delims() no longer left the
module in inconsistent state.
- Prevent overflow in _Unpickler_Read.
- Issue #25047: The XML encoding declaration written by Element Tree now
respects the letter case given by the user. This restores the ability to
write encoding names in uppercase like "UTF-8", which worked in Python 2.
- Issue #19143: platform module now reads Windows version from kernel32.dll to
avoid compatibility shims.
- Issue #23517: Fix rounding in fromtimestamp() and utcfromtimestamp() methods
of datetime.datetime: microseconds are now rounded to nearest with ties
going to nearest even integer (ROUND_HALF_EVEN), instead of being rounding
towards zero (ROUND_DOWN). It's important that these methods use the same
rounding mode than datetime.timedelta to keep the property:
(datetime(1970,1,1) + timedelta(seconds=t)) == datetime.utcfromtimestamp(t).
It also the rounding mode used by round(float) for example.
- Issue #24684: socket.socket.getaddrinfo() now calls
PyUnicode_AsEncodedString() instead of calling the encode() method of the
host, to handle correctly custom string with an encode() method which doesn't
return a byte string. The encoder of the IDNA codec is now called directly
instead of calling the encode() method of the string.
- Issue #24982: shutil.make_archive() with the "zip" format now adds entries
for directories (including empty directories) in ZIP file.
- Issue #24857: Comparing call_args to a long sequence now correctly returns a
boolean result instead of raising an exception. Patch by A Kaptur.
- Issue #25019: Fixed a crash caused by setting non-string key of expat parser.
Based on patch by John Leitch.
- Issue #24917: time_strftime() buffer over-read.
- Issue #23144: Make sure that HTMLParser.feed() returns all the data, even
when convert_charrefs is True.
- Issue #16180: Exit pdb if file has syntax error, instead of trapping user
in an infinite loop. Patch by Xavier de Gaye.
- Issue #21112: Fix regression in unittest.expectedFailure on subclasses.
Patch from Berker Peksag.
- Issue #24931: Instances of subclasses of namedtuples have their own __dict__
which breaks the inherited __dict__ property and breaks the _asdict() method.
Removed the __dict__ property to prevent the conflict and fixed _asdict().
- Issue #24764: cgi.FieldStorage.read_multi() now ignores the Content-Length
header in part headers. Patch written by Peter Landry and reviewed by Pierre
Quentel.
- Issue #24774: Fix docstring in http.server.test. Patch from Chiu-Hsiang Hsu.
- Issue #21159: Improve message in configparser.InterpolationMissingOptionError.
Patch from Łukasz Langa.
- Issue #23888: Handle fractional time in cookie expiry. Patch by ssh.
- Issue #23004: mock_open() now reads binary data correctly when the type of
read_data is bytes. Initial patch by Aaron Hill.
- Issue #23652: Make it possible to compile the select module against the
libc headers from the Linux Standard Base, which do not include some
EPOLL macros. Patch by Matt Frank.
- Issue #22932: Fix timezones in email.utils.formatdate.
Patch from Dmitry Shachnev.
- Issue #23779: imaplib raises TypeError if authenticator tries to abort.
Patch from Craig Holmquist.
- Issue #23319: Fix ctypes.BigEndianStructure, swap correctly bytes. Patch
written by Matthieu Gautier.
- Issue #23254: Document how to close the TCPServer listening socket.
Patch from Martin Panter.
- Issue #19450: Update Windows and OS X installer builds to use SQLite 3.8.11.
- Issue #23441: rcompleter now prints a tab character instead of displaying
possible completions for an empty word. Initial patch by Martin Sekera.
- Issue #24735: Fix invalid memory access in
itertools.combinations_with_replacement().
- Issue #17527: Add PATCH to wsgiref.validator. Patch from Luca Sbardella.
- Issue #24683: Fixed crashes in _json functions called with arguments of
inappropriate type.
- Issue #21697: shutil.copytree() now correctly handles symbolic links that
point to directories. Patch by Eduardo Seabra and Thomas Kluyver.
- Issue #24620: Random.setstate() now validates the value of state last element.
- Issue #22153: Improve unittest docs. Patch from Martin Panter and evilzero.
- Issue #24206: Fixed __eq__ and __ne__ methods of inspect classes.
- Issue #21750: mock_open.read_data can now be read from each instance, as it
could in Python 3.3.
- Issue #23247: Fix a crash in the StreamWriter.reset() of CJK codecs.
- Issue #18622: unittest.mock.mock_open().reset_mock would recurse infinitely.
Patch from Nicola Palumbo and Laurent De Buyst.
- Issue #24608: chunk.Chunk.read() now always returns bytes, not str.
- Issue #18684: Fixed reading out of the buffer in the re module.
- Issue #24259: tarfile now raises a ReadError if an archive is truncated
inside a data segment.
- Issue #24552: Fix use after free in an error case of the _pickle module.
- Issue #24514: tarfile now tolerates number fields consisting of only
whitespace.
- Issue #19176: Fixed doctype() related bugs in C implementation of ElementTree.
A deprecation warning no longer issued by XMLParser subclass with default
doctype() method. Direct call of doctype() now issues a warning. Parser's
doctype() now is not called if target's doctype() is called. Based on patch
by Martin Panter.
- Issue #20387: Restore semantic round-trip correctness in tokenize/untokenize
for tab-indented blocks.
- Issue #24456: Fixed possible buffer over-read in adpcm2lin() and lin2adpcm()
functions of the audioop module.
- Issue #24336: The contextmanager decorator now works with functions with
keyword arguments called "func" and "self". Patch by Martin Panter.
- Issue #24489: ensure a previously set C errno doesn't disturb cmath.polar().
- Issue #5633: Fixed timeit when the statement is a string and the setup is not.
- Issue #24326: Fixed audioop.ratecv() with non-default weightB argument.
Original patch by David Moore.
- Issue #23840: tokenize.open() now closes the temporary binary file on error
to fix a resource warning.
- Issue #24257: Fixed segmentation fault in sqlite3.Row constructor with faked
cursor type.
- Issue #22107: tempfile.gettempdir() and tempfile.mkdtemp() now try again
when a directory with the chosen name already exists on Windows as well as
on Unix. tempfile.mkstemp() now fails early if parent directory is not
valid (not exists or is a file) on Windows.
- Issue #6598: Increased time precision and random number range in
email.utils.make_msgid() to strengthen the uniqueness of the message ID.
- Issue #24091: Fixed various crashes in corner cases in C implementation of
ElementTree.
- Issue #21931: msilib.FCICreate() now raises TypeError in the case of a bad
argument instead of a ValueError with a bogus FCI error number.
Patch by Jeffrey Armstrong.
- Issue #23796: peek and read1 methods of BufferedReader now raise ValueError
if they called on a closed object. Patch by John Hergenroeder.
- Issue #24521: Fix possible integer overflows in the pickle module.
- Issue #22931: Allow '[' and ']' in cookie values.
- Issue #20274: Remove ignored and erroneous "kwargs" parameters from three
METH_VARARGS methods on _sqlite.Connection.
- Issue #24094: Fix possible crash in json.encode with poorly behaved dict
subclasses.
- Asyncio issue 222 / PR 231 (Victor Stinner) -- fix @coroutine
functions without __name__.
- Issue #9246: On POSIX, os.getcwd() now supports paths longer than 1025 bytes.
Patch written by William Orr.
- The keywords attribute of functools.partial is now always a dictionary.
- Issues #24099, #24100, and #24101: Fix free-after-use bug in heapq's siftup
and siftdown functions.
- Backport collections.deque fixes from Python 3.5. Prevents reentrant badness
during deletion by deferring the decref until the container has been restored
to a consistent state.
- Issue #23008: Fixed resolving attributes with boolean value is False in pydoc.
- Fix asyncio issue 235: LifoQueue and PriorityQueue's put didn't
increment unfinished tasks (this bug was introduced in 3.4.3 when
JoinableQueue was merged with Queue).
- Issue #23908: os functions now reject paths with embedded null character
on Windows instead of silently truncate them.
- Issue #23728: binascii.crc_hqx() could return an integer outside of the range
0-0xffff for empty data.
- Issue #23811: Add missing newline to the PyCompileError error message.
Patch by Alex Shkop.
- Issue #17898: Fix exception in gettext.py when parsing certain plural forms.
- Issue #22982: Improve BOM handling when seeking to multiple positions of
a writable text file.
- Issue #23865: close() methods in multiple modules now are idempotent and more
robust at shutdown. If they need to release multiple resources, all are
released even if errors occur.
- Issue #23881: urllib.request.ftpwrapper constructor now closes the socket if
the FTP connection failed to fix a ResourceWarning.
- Issue #23400: Raise same exception on both Python 2 and 3 if sem_open is not
available. Patch by Davin Potts.
- Issue #15133: _tkinter.tkapp.getboolean() now supports Tcl_Obj and always
returns bool. tkinter.BooleanVar now validates input values (accepted bool,
int, str, and Tcl_Obj). tkinter.BooleanVar.get() now always returns bool.
- Issue #23338: Fixed formatting ctypes error messages on Cygwin.
Patch by Makoto Kato.
- Issue #16840: Tkinter now supports 64-bit integers added in Tcl 8.4 and
arbitrary precision integers added in Tcl 8.5.
- Issue #23834: Fix socket.sendto(), use the C Py_ssize_t type to store the
result of sendto() instead of the C int type.
- Issue #21526: Tkinter now supports new boolean type in Tcl 8.5.
- Issue #23838: linecache now clears the cache and returns an empty result on
MemoryError.
- Issue #18473: Fixed 2to3 and 3to2 compatible pickle mappings. Fixed
ambigious reverse mappings. Added many new mappings. Import mapping is no
longer applied to modules already mapped with full name mapping.
- Issue #23745: The new email header parser now handles duplicate MIME
parameter names without error, similar to how get_param behaves.
- Issue #23792: Ignore KeyboardInterrupt when the pydoc pager is active.
This mimics the behavior of the standard unix pagers, and prevents
pipepager from shutting down while the pager itself is still running.
- Issue #23742: ntpath.expandvars() no longer loses unbalanced single quotes.
- Issue #21802: The reader in BufferedRWPair now is closed even when closing
writer failed in BufferedRWPair.close().
- Issue #23671: string.Template now allows to specify the "self" parameter as
keyword argument. string.Formatter now allows to specify the "self" and
the "format_string" parameters as keyword arguments.
- Issue #21560: An attempt to write a data of wrong type no longer cause
GzipFile corruption. Original patch by Wolfgang Maier.
- Issue #23647: Increase impalib's MAXLINE to accommodate modern mailbox sizes.
- Issue #23539: If body is None, http.client.HTTPConnection.request now sets
Content-Length to 0 for PUT, POST, and PATCH headers to avoid 411 errors from
some web servers.
- Issue #22351: The nntplib.NNTP constructor no longer leaves the connection
and socket open until the garbage collector cleans them up. Patch by
Martin Panter.
- Issue #23136: _strptime now uniformly handles all days in week 0, including
Dec 30 of previous year. Based on patch by Jim Carroll.
- Issue #23700: Iterator of NamedTemporaryFile now keeps a reference to
NamedTemporaryFile instance. Patch by Bohuslav Kabrda.
- Issue #22903: The fake test case created by unittest.loader when it fails
importing a test module is now picklable.
- Issue #23568: Add rdivmod support to MagicMock() objects.
Patch by Håkan Lövdahl.
- Issue #23138: Fixed parsing cookies with absent keys or values in cookiejar.
Patch by Demian Brecht.
- Issue #23051: multiprocessing.Pool methods imap() and imap_unordered() now
handle exceptions raised by an iterator. Patch by Alon Diamant and Davin
Potts.
- Issue #22928: Disabled HTTP header injections in http.client.
Original patch by Demian Brecht.
- Issue #23615: Modules bz2, tarfile and tokenize now can be reloaded with
imp.reload(). Patch by Thomas Kluyver.
- Issue #23476: In the ssl module, enable OpenSSL's X509_V_FLAG_TRUSTED_FIRST
flag on certificate stores when it is available.
- Issue #23576: Avoid stalling in SSL reads when EOF has been reached in the
SSL layer but the underlying connection hasn't been closed.
- Issue #23504: Added an __all__ to the types module.
- Issue #20204: Added the __module__ attribute to _tkinter classes.
- Issue #23521: Corrected pure python implementation of timedelta division.
* Eliminated OverflowError from timedelta * float for some floats;
* Corrected rounding in timedlta true division.
- Issue #21619: Popen objects no longer leave a zombie after exit in the with
statement if the pipe was broken. Patch by Martin Panter.
- Issue #6639: Module-level turtle functions no longer raise TclError after
closing the window.
- Issues #814253, #9179: Warnings now are raised when group references and
conditional group references are used in lookbehind assertions in regular
expressions.
- Issue #23215: Multibyte codecs with custom error handlers that ignores errors
consumed too much memory and raised SystemError or MemoryError.
Original patch by Aleksi Torhamo.
- Issue #5700: io.FileIO() called flush() after closing the file.
flush() was not called in close() if closefd=False.
- Issue #23374: Fixed pydoc failure with non-ASCII files when stdout encoding
differs from file system encoding (e.g. on Mac OS).
- Issue #23481: Remove RC4 from the SSL module's default cipher list.
- Issue #21548: Fix pydoc.synopsis() and pydoc.apropos() on modules with empty
docstrings.
- Issue #22885: Fixed arbitrary code execution vulnerability in the dbm.dumb
module. Original patch by Claudiu Popa.
- Issue #23146: Fix mishandling of absolute Windows paths with forward
slashes in pathlib.
- Issue #23421: Fixed compression in tarfile CLI. Patch by wdv4758h.
- Issue #23367: Fix possible overflows in the unicodedata module.
- Issue #23361: Fix possible overflow in Windows subprocess creation code.
- Issue #23801: Fix issue where cgi.FieldStorage did not always ignore the
entire preamble to a multipart body.
- Issue #23310: Fix MagicMock's initializer to work with __methods__, just
like configure_mock(). Patch by Kasia Jachim.
- asyncio: New event loop APIs: set_task_factory() and get_task_factory().
- asyncio: async() function is deprecated in favour of ensure_future().
- Issue #23898: Fix inspect.classify_class_attrs() to support attributes
with overloaded __eq__ and __bool__. Patch by Mike Bayer.
- Issue #24298: Fix inspect.signature() to correctly unwrap wrappers
around bound methods.
- Issue #23572: Fixed functools.singledispatch on classes with falsy
metaclasses. Patch by Ethan Furman.
IDLE
----
- Issue #24861: Most of idlelib is private and subject to change.
Use idleib.idle.* to start Idle. See idlelib.__init__.__doc__.
- Issue #25199: Idle: add synchronization comments for future maintainers.
- Issue #16893: Replace help.txt with help.html for Idle doc display.
The new idlelib/help.html is rstripped Doc/build/html/library/idle.html.
It looks better than help.txt and will better document Idle as released.
The tkinter html viewer that works for this file was written by Mark Roseman.
The now unused EditorWindow.HelpDialog class and helt.txt file are deprecated.
- Issue #24199: Deprecate unused idlelib.idlever with possible removal in 3.6.
- Issue #24782: In Idle extension config dialog, replace tabs with sorted list.
Patch by Mark Roseman.
- Issue #24790: Remove extraneous code (which also create 2 & 3 conflicts).
- Issue #23672: Allow Idle to edit and run files with astral chars in name.
Patch by Mohd Sanad Zaki Rizvi.
- Issue 24745: Idle editor default font. Switch from Courier to
platform-sensitive TkFixedFont. This should not affect current customized
font selections. If there is a problem, edit $HOME/.idlerc/config-main.cfg
and remove 'fontxxx' entries from [Editor Window]. Patch by Mark Roseman.
- Issue #21192: Idle editor. When a file is run, put its name in the restart bar.
Do not print false prompts. Original patch by Adnan Umer.
- Issue #13884: Idle menus. Remove tearoff lines. Patch by Roger Serwy.
- Issue #23184: remove unused names and imports in idlelib.
Initial patch by Al Sweigart.
Tests
-----
- Issue #24751: When running regrtest with the ``-w`` command line option,
a test run is no longer marked as a failure if all tests succeed when
re-run.
- Issue #21520: test_zipfile no longer fails if the word 'bad' appears
anywhere in the name of the current directory.
- Issue #23799: Added test.support.start_threads() for running and
cleaning up multiple threads.
- Issue #22390: test.regrtest now emits a warning if temporary files or
directories are left after running a test.
- Issue #23583: Added tests for standard IO streams in IDLE.
Build
-----
- Issue #23445: pydebug builds now use "gcc -Og" where possible, to make
the resulting executable faster.
- Issue #24603: Update Windows builds and OS X 10.5 installer to use OpenSSL
1.0.2d.
C API
-----
- Issue #23998: PyImport_ReInitLock() now checks for lock allocation error
Documentation
-------------
- Issue #12067: Rewrite Comparisons section in the Expressions chapter of the
language reference. Some of the details of comparing mixed types were
incorrect or ambiguous. NotImplemented is only relevant at a lower level
than the Expressions chapter. Added details of comparing range() objects,
and default behaviour and consistency suggestions for user-defined classes.
Patch from Andy Maier.
- Issue #24952: Clarify the default size argument of stack_size() in
the "threading" and "_thread" modules. Patch from Mattip.
- Issue #24808: Update the types of some PyTypeObject fields. Patch by
Joseph Weston.
- Issue #22812: Fix unittest discovery examples.
Patch from Pam McA'Nulty.
- Issue #24129: Clarify the reference documentation for name resolution.
This includes removing the assumption that readers will be familiar with the
name resolution scheme Python used prior to the introduction of lexical
scoping for function namespaces. Patch by Ivan Levkivskyi.
- Issue #20769: Improve reload() docs. Patch by Dorian Pula.
- Issue #23589: Remove duplicate sentence from the FAQ. Patch by Yongzhi Pan.
- Issue #24729: Correct IO tutorial to match implementation regarding
encoding parameter to open function.
- Issue #24351: Clarify what is meant by "identifier" in the context of
string.Template instances.
- Issue #22155: Add File Handlers subsection with createfilehandler to tkinter
doc. Remove obsolete example from FAQ. Patch by Martin Panter.
- Issue #24029: Document the name binding behavior for submodule imports.
- Issue #24077: Fix typo in man page for -I command option: -s, not -S.
Tools/Demos
-----------
- Issue #23330: h2py now supports arbitrary filenames in #include.
- Issue #24031: make patchcheck now supports git checkouts, too.
Windows
-------
- Issue #25022: Removed very outdated PC/example_nt/ directory.
What's New in Python 3.4.3?
===========================
Release date: 2015-02-23
Core and Builtins
-----------------
- Issue #22735: Fix many edge cases (including crashes) involving custom mro()
implementations.
- Issue #22896: Avoid using PyObject_AsCharBuffer(), PyObject_AsReadBuffer()
and PyObject_AsWriteBuffer().
- Issue #21295: Revert some changes (issue #16795) to AST line numbers and
column offsets that constituted a regression.
- Issue #21408: The default __ne__() now returns NotImplemented if __eq__()
returned NotImplemented. Original patch by Martin Panter.
- Issue #23321: Fixed a crash in str.decode() when error handler returned
replacment string longer than mailformed input data.
- Issue #23048: Fix jumping out of an infinite while loop in the pdb.
- Issue #20335: bytes constructor now raises TypeError when encoding or errors
is specified with non-string argument. Based on patch by Renaud Blanch.
- Issue #22335: Fix crash when trying to enlarge a bytearray to 0x7fffffff
bytes on a 32-bit platform.
- Issue #22653: Fix an assertion failure in debug mode when doing a reentrant
dict insertion in debug mode.
- Issue #22643: Fix integer overflow in Unicode case operations (upper, lower,
title, swapcase, casefold).
- Issue #22604: Fix assertion error in debug mode when dividing a complex
number by (nan+0j).
- Issue #22470: Fixed integer overflow issues in "backslashreplace",
"xmlcharrefreplace", and "surrogatepass" error handlers.
- Issue #22520: Fix overflow checking when generating the repr of a unicode
object.
- Issue #22519: Fix overflow checking in PyBytes_Repr.
- Issue #22518: Fix integer overflow issues in latin-1 encoding.
- Issue #23165: Perform overflow checks before allocating memory in the
_Py_char2wchar function.
Library
-------
- Issue #23399: pyvenv creates relative symlinks where possible.
- Issue #23099: Closing io.BytesIO with exported buffer is rejected now to
prevent corrupting exported buffer.
- Issue #23363: Fix possible overflow in itertools.permutations.
- Issue #23364: Fix possible overflow in itertools.product.
- Issue #23366: Fixed possible integer overflow in itertools.combinations.
- Issue #23369: Fixed possible integer overflow in
_json.encode_basestring_ascii.
- Issue #23353: Fix the exception handling of generators in
PyEval_EvalFrameEx(). At entry, save or swap the exception state even if
PyEval_EvalFrameEx() is called with throwflag=0. At exit, the exception state
is now always restored or swapped, not only if why is WHY_YIELD or
WHY_RETURN. Patch co-written with Antoine Pitrou.
- Issue #18518: timeit now rejects statements which can't be compiled outside
a function or a loop (e.g. "return" or "break").
- Issue #23094: Fixed readline with frames in Python implementation of pickle.
- Issue #23268: Fixed bugs in the comparison of ipaddress classes.
- Issue #21408: Removed incorrect implementations of __ne__() which didn't
returned NotImplemented if __eq__() returned NotImplemented. The default
__ne__() now works correctly.
- Issue #19996: :class:`email.feedparser.FeedParser` now handles (malformed)
headers with no key rather than assuming the body has started.
- Issue #23248: Update ssl error codes from latest OpenSSL git master.
- Issue #23098: 64-bit dev_t is now supported in the os module.
- Issue #23250: In the http.cookies module, capitalize "HttpOnly" and "Secure"
as they are written in the standard.
- Issue #23063: In the disutils' check command, fix parsing of reST with code or
code-block directives.
- Issue #23209, #23225: selectors.BaseSelector.close() now clears its internal
reference to the selector mapping to break a reference cycle. Initial patch
written by Martin Richard.
- Issue #21356: Make ssl.RAND_egd() optional to support LibreSSL. The
availability of the function is checked during the compilation. Patch written
by Bernard Spil.
- Issue #20896, #22935: The :func:`ssl.get_server_certificate` function now
uses the :data:`~ssl.PROTOCOL_SSLv23` protocol by default, not
:data:`~ssl.PROTOCOL_SSLv3`, for maximum compatibility and support platforms
where :data:`~ssl.PROTOCOL_SSLv3` support is disabled.
- Issue #23111: In the ftplib, make ssl.PROTOCOL_SSLv23 the default protocol
version.
- Issue #23132: Mitigate regression in speed and clarity in functools.total_ordering.
- Issue #22585: On OpenBSD 5.6 and newer, os.urandom() now calls getentropy(),
instead of reading /dev/urandom, to get pseudo-random bytes.
- Issue #23112: Fix SimpleHTTPServer to correctly carry the query string and
fragment when it redirects to add a trailing slash.
- Issue #23093: In the io, module allow more operations to work on detached
streams.
- Issue #19104: pprint now produces evaluable output for wrapped strings.
- Issue #23071: Added missing names to codecs.__all__. Patch by Martin Panter.
- Issue #15513: Added a __sizeof__ implementation for pickle classes.
- Issue #19858: pickletools.optimize() now aware of the MEMOIZE opcode, can
produce more compact result and no longer produces invalid output if input
data contains MEMOIZE opcodes together with PUT or BINPUT opcodes.
- Issue #22095: Fixed HTTPConnection.set_tunnel with default port. The port
value in the host header was set to "None". Patch by Demian Brecht.
- Issue #23016: A warning no longer produces an AttributeError when the program
is run with pythonw.exe.
- Issue #21775: shutil.copytree(): fix crash when copying to VFAT. An exception
handler assumed that that OSError objects always have a 'winerror' attribute.
That is not the case, so the exception handler itself raised AttributeError
when run on Linux (and, presumably, any other non-Windows OS).
Patch by Greg Ward.
- Issue #1218234: Fix inspect.getsource() to load updated source of
reloaded module. Initial patch by Berker Peksag.
- Issue #22959: In the constructor of http.client.HTTPSConnection, prefer the
context's check_hostname attribute over the *check_hostname* parameter.
- Issue #16043: Add a default limit for the amount of data xmlrpclib.gzip_decode
will return. This resolves CVE-2013-1753.
- Issue #22966: Fix __pycache__ pyc file name clobber when pyc_compile is
asked to compile a source file containing multiple dots in the source file
name.
- Issue #21971: Update turtledemo doc and add module to the index.
- Issue #21032. Fixed socket leak if HTTPConnection.getresponse() fails.
Original patch by Martin Panter.
- Issue #22960: Add a context argument to xmlrpclib.ServerProxy constructor.
- Issue #22915: SAX parser now supports files opened with file descriptor or
bytes path.
- Issue #22609: Constructors and update methods of mapping classes in the
collections module now accept the self keyword argument.
- Issue #22788: Add *context* parameter to logging.handlers.HTTPHandler.
- Issue #22921: Allow SSLContext to take the *hostname* parameter even if
OpenSSL doesn't support SNI.
- Issue #22894: TestCase.subTest() would cause the test suite to be stopped
when in failfast mode, even in the absence of failures.
- Issue #22638: SSLv3 is now disabled throughout the standard library.
It can still be enabled by instantiating a SSLContext manually.
- Issue #22370: Windows detection in pathlib is now more robust.
- Issue #22841: Reject coroutines in asyncio add_signal_handler().
Patch by Ludovic.Gasc.
- Issue #22849: Fix possible double free in the io.TextIOWrapper constructor.
- Issue #12728: Different Unicode characters having the same uppercase but
different lowercase are now matched in case-insensitive regular expressions.
- Issue #22821: Fixed fcntl() with integer argument on 64-bit big-endian
platforms.
- Issue #22406: Fixed the uu_codec codec incorrectly ported to 3.x.
Based on patch by Martin Panter.
- Issue #17293: uuid.getnode() now determines MAC address on AIX using netstat.
Based on patch by Aivars Kalvāns.
- Issue #22769: Fixed ttk.Treeview.tag_has() when called without arguments.
- Issue #22417: Verify certificates by default in httplib (PEP 476).
- Issue #22775: Fixed unpickling of http.cookies.SimpleCookie with protocol 2
and above. Patch by Tim Graham.
- Issue #22366: urllib.request.urlopen will accept a context object
(SSLContext) as an argument which will then used be for HTTPS connection.
Patch by Alex Gaynor.
- Issue #22776: Brought excluded code into the scope of a try block in
SysLogHandler.emit().
- Issue #22665: Add missing get_terminal_size and SameFileError to
shutil.__all__.
- Issue #17381: Fixed handling of case-insensitive ranges in regular
expressions.
- Issue #22410: Module level functions in the re module now cache compiled
locale-dependent regular expressions taking into account the locale.
- Issue #22759: Query methods on pathlib.Path() (exists(), is_dir(), etc.)
now return False when the underlying stat call raises NotADirectoryError.
- Issue #8876: distutils now falls back to copying files when hard linking
doesn't work. This allows use with special filesystems such as VirtualBox
shared folders.
- Issue #18853: Fixed ResourceWarning in shlex.__nain__.
- Issue #9351: Defaults set with set_defaults on an argparse subparser
are no longer ignored when also set on the parent parser.
- Issue #21991: Make email.headerregistry's header 'params' attributes
be read-only (MappingProxyType). Previously the dictionary was modifiable
but a new one was created on each access of the attribute.
- Issue #22641: In asyncio, the default SSL context for client connections
is now created using ssl.create_default_context(), for stronger security.
- Issue #22435: Fix a file descriptor leak when SocketServer bind fails.
- Issue #13096: Fixed segfault in CTypes POINTER handling of large
values.
- Issue #11694: Raise ConversionError in xdrlib as documented. Patch
by Filip Gruszczyński and Claudiu Popa.
- Issue #22462: Fix pyexpat's creation of a dummy frame to make it
appear in exception tracebacks.
- Issue #21173: Fix len() on a WeakKeyDictionary when .clear() was called
with an iterator alive.
- Issue #11866: Eliminated race condition in the computation of names
for new threads.
- Issue #21905: Avoid RuntimeError in pickle.whichmodule() when sys.modules
is mutated while iterating. Patch by Olivier Grisel.
- Issue #22219: The zipfile module CLI now adds entries for directories
(including empty directories) in ZIP file.
- Issue #22449: In the ssl.SSLContext.load_default_certs, consult the
environmental variables SSL_CERT_DIR and SSL_CERT_FILE on Windows.
- Issue #20076: Added non derived UTF-8 aliases to locale aliases table.
- Issue #20079: Added locales supported in glibc 2.18 to locale alias table.
- Issue #22396: On 32-bit AIX platform, don't expose os.posix_fadvise() nor
os.posix_fallocate() because their prototypes in system headers are wrong.
- Issue #22517: When a io.BufferedRWPair object is deallocated, clear its
weakrefs.
- Issue #22448: Improve canceled timer handles cleanup to prevent
unbound memory usage. Patch by Joshua Moore-Oliva.
- Issue #23009: Make sure selectors.EpollSelecrtor.select() works when no
FD is registered.
IDLE
----
- Issue #20577: Configuration of the max line length for the FormatParagraph
extension has been moved from the General tab of the Idle preferences dialog
to the FormatParagraph tab of the Config Extensions dialog.
Patch by Tal Einat.
- Issue #16893: Update Idle doc chapter to match current Idle and add new
information.
- Issue #3068: Add Idle extension configuration dialog to Options menu.
Changes are written to HOME/.idlerc/config-extensions.cfg.
Original patch by Tal Einat.
- Issue #16233: A module browser (File : Class Browser, Alt+C) requires a
editor window with a filename. When Class Browser is requested otherwise,
from a shell, output window, or 'Untitled' editor, Idle no longer displays
an error box. It now pops up an Open Module box (Alt+M). If a valid name
is entered and a module is opened, a corresponding browser is also opened.
- Issue #4832: Save As to type Python files automatically adds .py to the
name you enter (even if your system does not display it). Some systems
automatically add .txt when type is Text files.
- Issue #21986: Code objects are not normally pickled by the pickle module.
To match this, they are no longer pickled when running under Idle.
- Issue #23180: Rename IDLE "Windows" menu item to "Window".
Patch by Al Sweigart.
Tests
-----
- Issue #23392: Added tests for marshal C API that works with FILE*.
- Issue #18982: Add tests for CLI of the calendar module.
- Issue #19548: Added some additional checks to test_codecs to ensure that
statements in the updated documentation remain accurate. Patch by Martin
Panter.
- Issue #22838: All test_re tests now work with unittest test discovery.
- Issue #22173: Update lib2to3 tests to use unittest test discovery.
- Issue #16000: Convert test_curses to use unittest.
- Issue #21456: Skip two tests in test_urllib2net.py if _ssl module not
present. Patch by Remi Pointel.
- Issue #22770: Prevent some Tk segfaults on OS X when running gui tests.
- Issue #23211: Workaround test_logging failure on some OS X 10.6 systems.
- Issue #23345: Prevent test_ssl failures with large OpenSSL patch level
values (like 0.9.8zc).
- Issue #22289: Prevent test_urllib2net failures due to ftp connection timeout.
Build
-----
- Issue #15506: Use standard PKG_PROG_PKG_CONFIG autoconf macro in the configure
script.
- Issue #22935: Allow the ssl module to be compiled if openssl doesn't support
SSL 3.
- Issue #16537: Check whether self.extensions is empty in setup.py. Patch by
Jonathan Hosmer.
- Issue #18096: Fix library order returned by python-config.
- Issue #17219: Add library build dir for Python extension cross-builds.
- Issue #17128: Use private version of OpenSSL for 3.4.3 OS X 10.5+ installer.
C API
-----
- Issue #22079: PyType_Ready() now checks that statically allocated type has
no dynamically allocated bases.
Documentation
-------------
- Issue #19548: Update the codecs module documentation to better cover the
distinction between text encodings and other codecs, together with other
clarifications. Patch by Martin Panter.
- Issue #22914: Update the Python 2/3 porting HOWTO to describe a more automated
approach.
- Issue #21514: The documentation of the json module now refers to new JSON RFC
7159 instead of obsoleted RFC 4627.
Tools/Demos
-----------
- Issue #22314: pydoc now works when the LINES environment variable is set.
Windows
-------
- Issue #17896: The Windows build scripts now expect external library sources
to be in ``PCbuild\..\externals`` rather than ``PCbuild\..\..``.
- Issue #17717: The Windows build scripts now use a copy of NASM pulled from
svn.python.org to build OpenSSL.
- Issue #22644: The bundled version of OpenSSL has been updated to 1.0.1j.
What's New in Python 3.4.2?
===========================
Release date: 2014-10-06
Library
-------
- Issue #10510: distutils register and upload methods now use HTML standards
compliant CRLF line endings.
- Issue #9850: Fixed macpath.join() for empty first component. Patch by
Oleg Oshmyan.
- Issue #22427: TemporaryDirectory no longer attempts to clean up twice when
used in the with statement in generator.
- Issue #20912: Now directories added to ZIP file have correct Unix and MS-DOS
directory attributes.
- Issue #21866: ZipFile.close() no longer writes ZIP64 central directory
records if allowZip64 is false.
- Issue #22415: Fixed debugging output of the GROUPREF_EXISTS opcode in the re
module. Removed trailing spaces in debugging output.
- Issue #22423: Unhandled exception in thread no longer causes unhandled
AttributeError when sys.stderr is None.
- Issue #21332: Ensure that ``bufsize=1`` in subprocess.Popen() selects
line buffering, rather than block buffering. Patch by Akira Li.
What's New in Python 3.4.2rc1?
==============================
Release date: 2014-09-22
Core and Builtins
-----------------
- Issue #22258: Fix the the internal function set_inheritable() on Illumos.
This platform exposes the function ``ioctl(FIOCLEX)``, but calling it fails
with errno is ENOTTY: "Inappropriate ioctl for device". set_inheritable()
now falls back to the slower ``fcntl()`` (``F_GETFD`` and then ``F_SETFD``).
- Issue #21669: With the aid of heuristics in SyntaxError.__init__, the
parser now attempts to generate more meaningful (or at least more search
engine friendly) error messages when "exec" and "print" are used as
statements.
- Issue #21642: If the conditional if-else expression, allow an integer written
with no space between itself and the ``else`` keyword (e.g. ``True if 42else
False``) to be valid syntax.
- Issue #21523: Fix over-pessimistic computation of the stack effect of
some opcodes in the compiler. This also fixes a quadratic compilation
time issue noticeable when compiling code with a large number of "and"
and "or" operators.
Library
-------
- Issue #21091: Fix API bug: email.message.EmailMessage.is_attachment is now
a method. Since EmailMessage is provisional, we can change the API in a
maintenance release, but we use a trick to remain backward compatible with
3.4.0/1.
- Issue #21079: Fix email.message.EmailMessage.is_attachment to return the
correct result when the header has parameters as well as a value.
- Issue #22247: Add NNTPError to nntplib.__all__.
- Issue #4180: The warnings registries are now reset when the filters
are modified.
- Issue #22419: Limit the length of incoming HTTP request in wsgiref server to
65536 bytes and send a 414 error code for higher lengths. Patch contributed
by Devin Cook.
- Lax cookie parsing in http.cookies could be a security issue when combined
with non-standard cookie handling in some Web browsers. Reported by
Sergey Bobrov.
- Issue #22384: An exception in Tkinter callback no longer crashes the program
when it is run with pythonw.exe.
- Issue #22168: Prevent turtle AttributeError with non-default Canvas on OS X.
- Issue #21147: sqlite3 now raises an exception if the request contains a null
character instead of truncate it. Based on patch by Victor Stinner.
- Issue #21951: Fixed a crash in Tkinter on AIX when called Tcl command with
empty string or tuple argument.
- Issue #21951: Tkinter now most likely raises MemoryError instead of crash
if the memory allocation fails.
- Issue #22338: Fix a crash in the json module on memory allocation failure.
- Issue #22226: First letter no longer is stripped from the "status" key in
the result of Treeview.heading().
- Issue #19524: Fixed resource leak in the HTTP connection when an invalid
response is received. Patch by Martin Panter.
- Issue #22051: turtledemo no longer reloads examples to re-run them.
Initialization of variables and gui setup should be done in main(),
which is called each time a demo is run, but not on import.
- Issue #21933: Turtledemo users can change the code font size with a menu
selection or control(command) '-' or '+' or control-mousewheel.
Original patch by Lita Cho.
- Issue #21597: The separator between the turtledemo text pane and the drawing
canvas can now be grabbed and dragged with a mouse. The code text pane can
be widened to easily view or copy the full width of the text. The canvas
can be widened on small screens. Original patches by Jan Kanis and Lita Cho.
- Issue #18132: Turtledemo buttons no longer disappear when the window is
shrunk. Original patches by Jan Kanis and Lita Cho.
- Issue #22216: smtplib now resets its state more completely after a quit. The
most obvious consequence of the previous behavior was a STARTTLS failure
during a connect/starttls/quit/connect/starttls sequence.
- Issue #22185: Fix an occasional RuntimeError in threading.Condition.wait()
caused by mutation of the waiters queue without holding the lock. Patch
by Doug Zongker.
- Issue #22182: Use e.args to unpack exceptions correctly in
distutils.file_util.move_file. Patch by Claudiu Popa.
- The webbrowser module now uses subprocess's start_new_session=True rather
than a potentially risky preexec_fn=os.setsid call.
- Issue #22236: Fixed Tkinter images copying operations in NoDefaultRoot mode.
- Issue #22191: Fix warnings.__all__.
- Issue #15696: Add a __sizeof__ implementation for mmap objects on Windows.
- Issue #22068: Avoided reference loops with Variables and Fonts in Tkinter.
- Issue #22165: SimpleHTTPRequestHandler now supports undecodable file names.
- Issue #8797: Raise HTTPError on failed Basic Authentication immediately.
Initial patch by Sam Bull.
- Issue #20729: Restored the use of lazy iterkeys()/itervalues()/iteritems()
in the mailbox module.
- Issue #21448: Changed FeedParser feed() to avoid O(N**2) behavior when
parsing long line. Original patch by Raymond Hettinger.
- Issue #22184: The functools LRU Cache decorator factory now gives an earlier
and clearer error message when the user forgets the required parameters.
- Issue #17923: glob() patterns ending with a slash no longer match non-dirs on
AIX. Based on patch by Delhallt.
- Issue #21121: Don't force 3rd party C extensions to be built with
-Werror=declaration-after-statement.
- Issue #21975: Fixed crash when using uninitialized sqlite3.Row (in particular
when unpickling pickled sqlite3.Row). sqlite3.Row is now initialized in the
__new__() method.
- Issue #21580: Now Tkinter correctly handles bytes arguments passed to Tk.
In particular this allows to initialize images from binary data.
- Issue #17172: Make turtledemo start as active on OS X even when run with
subprocess. Patch by Lita Cho.
- Issue #21704: Fix build error for _multiprocessing when semaphores
are not available. Patch by Arfrever Frehtes Taifersar Arahesis.
- Fix repr(_socket.socket) on Windows 64-bit: don't fail with OverflowError
on closed socket. repr(socket.socket) already works fine.
- Issue #16133: The asynchat.async_chat.handle_read() method now ignores
BlockingIOError exceptions.
- Issue #22044: Fixed premature DECREF in call_tzinfo_method.
Patch by Tom Flanagan.
- Issue #19884: readline: Disable the meta modifier key if stdout is not
a terminal to not write the ANSI sequence "\033[1034h" into stdout. This
sequence is used on some terminal (ex: TERM=xterm-256color") to enable
support of 8 bit characters.
- Issue #21888: plistlib's load() and loads() now work if the fmt parameter is
specified.
- Issue #21044: tarfile.open() now handles fileobj with an integer 'name'
attribute. Based on patch by Antoine Pietri.
- Issue #21867: Prevent turtle crash due to invalid undo buffer size.
- Issue #19076: Don't pass the redundant 'file' argument to self.error().
- Issue #21942: Fixed source file viewing in pydoc's server mode on Windows.
- Issue #11259: asynchat.async_chat().set_terminator() now raises a ValueError
if the number of received bytes is negative.
- Issue #12523: asynchat.async_chat.push() now raises a TypeError if it doesn't
get a bytes string
- Issue #21707: Add missing kwonlyargcount argument to
ModuleFinder.replace_paths_in_code().
- Issue #20639: calling Path.with_suffix('') allows removing the suffix
again. Patch by July Tikhonov.
- Issue #21714: Disallow the construction of invalid paths using
Path.with_name(). Original patch by Antony Lee.
- Issue #21897: Fix a crash with the f_locals attribute with closure
variables when frame.clear() has been called.
- Issue #21151: Fixed a segfault in the winreg module when ``None`` is passed
as a ``REG_BINARY`` value to SetValueEx. Patch by John Ehresman.
- Issue #21090: io.FileIO.readall() does not ignore I/O errors anymore. Before,
it ignored I/O errors if at least the first C call read() succeed.
- Issue #21781: ssl.RAND_add() now supports strings longer than 2 GB.
- Issue #11453: asyncore: emit a ResourceWarning when an unclosed file_wrapper
object is destroyed. The destructor now closes the file if needed. The
close() method can now be called twice: the second call does nothing.
- Issue #21858: Better handling of Python exceptions in the sqlite3 module.
- Issue #21476: Make sure the email.parser.BytesParser TextIOWrapper is
discarded after parsing, so the input file isn't unexpectedly closed.
- Issue #21729: Used the "with" statement in the dbm.dumb module to ensure
files closing. Patch by Claudiu Popa.
- Issue #21491: socketserver: Fix a race condition in child processes reaping.
- Issue #21832: Require named tuple inputs to be exact strings.
- Issue #19145: The times argument for itertools.repeat now handles
negative values the same way for keyword arguments as it does for
positional arguments.
- Issue #21812: turtle.shapetransform did not tranform the turtle on the
first call. (Issue identified and fixed by Lita Cho.)
- Issue #21635: The difflib SequenceMatcher.get_matching_blocks() method
cache didn't match the actual result. The former was a list of tuples
and the latter was a list of named tuples.
- Issue #21722: The distutils "upload" command now exits with a non-zero
return code when uploading fails. Patch by Martin Dengler.
- Issue #21723: asyncio.Queue: support any type of number (ex: float) for the
maximum size. Patch written by Vajrasky Kok.
- Issue #21326: Add a new is_closed() method to asyncio.BaseEventLoop.
run_forever() and run_until_complete() methods of asyncio.BaseEventLoop now
raise an exception if the event loop was closed.
- Issue #21774: Fixed NameError for an incorrect variable reference in the
XML Minidom code for creating processing instructions.
(Found and fixed by Claudiu Popa.)
- Issue #21766: Prevent a security hole in CGIHTTPServer by URL unquoting paths
before checking for a CGI script at that path.
- Issue #21310: Fixed possible resource leak in failed open().
- Issue #21677: Fixed chaining nonnormalized exceptions in io close() methods.
- Issue #11709: Fix the pydoc.help function to not fail when sys.stdin is not a
valid file.
- Issue #13223: Fix pydoc.writedoc so that the HTML documentation for methods
that use 'self' in the example code is generated correctly.
- Issue #21463: In urllib.request, fix pruning of the FTP cache.
- Issue #21618: The subprocess module could fail to close open fds that were
inherited by the calling process and already higher than POSIX resource
limits would otherwise allow. On systems with a functioning /proc/self/fd
or /dev/fd interface the max is now ignored and all fds are closed.
- Issue #21552: Fixed possible integer overflow of too long string lengths in
the tkinter module on 64-bit platforms.
- Issue #14315: The zipfile module now ignores extra fields in the central
directory that are too short to be parsed instead of letting a struct.unpack
error bubble up as this "bad data" appears in many real world zip files in
the wild and is ignored by other zip tools.
- Issue #21402: tkinter.ttk now works when default root window is not set.
- Issue #10203: sqlite3.Row now truly supports sequence protocol. In particulr
it supports reverse() and negative indices. Original patch by Claudiu Popa.
- Issue #18807: If copying (no symlinks) specified for a venv, then the python
interpreter aliases (python, python3) are now created by copying rather than
symlinking.
- Issue #14710: pkgutil.get_loader() no longer raises an exception when None is
found in sys.modules.
- Issue #14710: pkgutil.find_loader() no longer raises an exception when a
module doesn't exist.
- Issue #21481: Argparse equality and inequality tests now return
NotImplemented when comparing to an unknown type.
- Issue #8743: Fix interoperability between set objects and the
collections.Set() abstract base class.
- Issue #13355: random.triangular() no longer fails with a ZeroDivisionError
when low equals high.
- Issue #21538: The plistlib module now supports loading of binary plist files
when reference or offset size is not a power of two.
- Issue #21801: Validate that __signature__ is None or an instance of Signature.
- Issue #21923: Prevent AttributeError in distutils.sysconfig.customize_compiler
due to possible uninitialized _config_vars.
- Issue #21323: Fix http.server to again handle scripts in CGI subdirectories,
broken by the fix for security issue #19435. Patch by Zach Byrne.
Extension Modules
-----------------
- Issue #22176: Update the ctypes module's libffi to v3.1. This release
adds support for the Linux AArch64 and POWERPC ELF ABIv2 little endian
architectures.
Build
-----
- Issue #15661: python.org OS X installers are now distributed as signed
installer packages compatible with the Gatekeeper security feature.
- Issue #21958: Define HAVE_ROUND when building with Visual Studio 2013 and
above. Patch by Zachary Turner.
- Issue #15759: "make suspicious", "make linkcheck" and "make doctest" in Doc/
now display special message when and only when there are failures.
- Issue #17095: Fix Modules/Setup *shared* support.
- Issue #21811: Anticipated fixes to support OS X versions > 10.9.
- Issue #21166: Prevent possible segfaults and other random failures of
python --generate-posix-vars in pybuilddir.txt build target.
IDLE
----
- Issue #17390: Adjust Editor window title; remove 'Python',
move version to end.
- Issue #14105: Idle debugger breakpoints no longer disappear
when inseting or deleting lines.
- Issue #17172: Turtledemo can now be run from Idle.
Currently, the entry is on the Help menu, but it may move to Run.
Patch by Ramchandra Apt and Lita Cho.
- Issue #21765: Add support for non-ascii identifiers to HyperParser.
- Issue #21940: Add unittest for WidgetRedirector. Initial patch by Saimadhav
Heblikar.
- Issue #18592: Add unittest for SearchDialogBase. Patch by Phil Webster.
- Issue #21694: Add unittest for ParenMatch. Patch by Saimadhav Heblikar.
- Issue #21686: add unittest for HyperParser. Original patch by Saimadhav
Heblikar.
- Issue #12387: Add missing upper(lower)case versions of default Windows key
bindings for Idle so Caps Lock does not disable them. Patch by Roger Serwy.
- Issue #21695: Closing a Find-in-files output window while the search is
still in progress no longer closes Idle.
- Issue #18910: Add unittest for textView. Patch by Phil Webster.
- Issue #18292: Add unittest for AutoExpand. Patch by Saihadhav Heblikar.
- Issue #18409: Add unittest for AutoComplete. Patch by Phil Webster.
Tests
-----
- Issue #22166: With the assistance of a new internal _codecs._forget_codec
helping function, test_codecs now clears the encoding caches to avoid the
appearance of a reference leak
- Issue #22236: Tkinter tests now don't reuse default root window. New root
window is created for every test class.
- Issue #20746: Fix test_pdb to run in refleak mode (-R). Patch by Xavier
de Gaye.
- Issue #22060: test_ctypes has been somewhat cleaned up and simplified; it
now uses unittest test discovery to find its tests.
- Issue #22104: regrtest.py no longer holds a reference to the suite of tests
loaded from test modules that don't define test_main().
- Issue #22002: Added ``load_package_tests`` function to test.support and used
it to implement/augment test discovery in test_asyncio, test_email,
test_importlib, test_json, and test_tools.
- Issue #21976: Fix test_ssl to accept LibreSSL version strings. Thanks
to William Orr.
- Issue #21918: Converted test_tools from a module to a package containing
separate test files for each tested script.
- Issue #20155: Changed HTTP method names in failing tests in test_httpservers
so that packet filtering software (specifically Windows Base Filtering Engine)
does not interfere with the transaction semantics expected by the tests.
- Issue #19493: Refactored the ctypes test package to skip tests explicitly
rather than silently.
- Issue #18492: All resources are now allowed when tests are not run by
regrtest.py.
- Issue #21634: Fix pystone micro-benchmark: use floor division instead of true
division to benchmark integers instead of floating point numbers. Set pystone
version to 1.2. Patch written by Lennart Regebro.
- Issue #21605: Added tests for Tkinter images.
- Issue #21493: Added test for ntpath.expanduser(). Original patch by
Claudiu Popa.
- Issue #19925: Added tests for the spwd module. Original patch by Vajrasky Kok.
- Issue #21522: Added Tkinter tests for Listbox.itemconfigure(),
PanedWindow.paneconfigure(), and Menu.entryconfigure().
Documentation
-------------
- Issue #21777: The binary sequence methods on bytes and bytearray are now
documented explicitly, rather than assuming users will be able to derive
the expected behaviour from the behaviour of the corresponding str methods.
Windows
-------
- Issue #21671, #22160, CVE-2014-0224: The bundled version of OpenSSL has been
updated to 1.0.1i.
- Issue #10747: Use versioned labels in the Windows start menu.
Patch by Olive Kilburn.
Tools/Demos
-----------
- Issue #22201: Command-line interface of the zipfile module now correctly
extracts ZIP files with directory entries. Patch by Ryan Wilson.
- Issue #21906: Make Tools/scripts/md5sum.py work in Python 3.
Patch by Zachary Ware.
- Issue #21629: Fix Argument Clinic's "--converters" feature.
What's New in Python 3.4.1?
===========================
Release date: 2014-05-18
Core and Builtins
-----------------
- Issue #21418: Fix a crash in the builtin function super() when called without
argument and without current frame (ex: embedded Python).
- Issue #21425: Fix flushing of standard streams in the interactive
interpreter.
- Issue #21435: In rare cases, when running finalizers on objects in cyclic
trash a bad pointer dereference could occur due to a subtle flaw in
internal iteration logic.
Library
-------
- Issue #10744: Fix PEP 3118 format strings on ctypes objects with a nontrivial
shape.
- Issue #20998: Fixed re.fullmatch() of repeated single character pattern
with ignore case. Original patch by Matthew Barnett.
- Issue #21075: fileinput.FileInput now reads bytes from standard stream if
binary mode is specified. Patch by Sam Kimbrel.
- Issue #21396: Fix TextIOWrapper(..., write_through=True) to not force a
flush() on the underlying binary stream. Patch by akira.
- Issue #21470: Do a better job seeding the random number generator by
using enough bytes to span the full state space of the Mersenne Twister.
- Issue #21398: Fix an unicode error in the pydoc pager when the documentation
contains characters not encodable to the stdout encoding.
Tests
-----
- Issue #17756: Fix test_code test when run from the installed location.
- Issue #17752: Fix distutils tests when run from the installed location.
IDLE
----
- Issue #18104: Add idlelib/idle_test/htest.py with a few sample tests to begin
consolidating and improving human-validated tests of Idle. Change other files
as needed to work with htest. Running the module as __main__ runs all tests.
What's New in Python 3.4.1rc1?
==============================
Release date: 2014-05-05
Core and Builtins
-----------------
- Issue #21274: Define PATH_MAX for GNU/Hurd in Python/pythonrun.c.
- Issue #21209: Fix sending tuples to custom generator objects with the yield
from syntax.
- Issue #21134: Fix segfault when str is called on an uninitialized
UnicodeEncodeError, UnicodeDecodeError, or UnicodeTranslateError object.
- Issue #19537: Fix PyUnicode_DATA() alignment under m68k. Patch by
Andreas Schwab.
- Issue #20929: Add a type cast to avoid shifting a negative number.
- Issue #20731: Properly position in source code files even if they
are opened in text mode. Patch by Serhiy Storchaka.
- Issue #20637: Key-sharing now also works for instance dictionaries of
subclasses. Patch by Peter Ingebretson.
- Issue #12546: Allow \x00 to be used as a fill character when using str, int,
float, and complex __format__ methods.
- Issue #13598: Modify string.Formatter to support auto-numbering of
replacement fields. It now matches the behavior of str.format() in
this regard. Patches by Phil Elson and Ramchandra Apte.
Library
-------
- Issue #21088: Bugfix for curses.window.addch() regression in 3.4.0.
In porting to Argument Clinic, the first two arguments were reversed.
- Issue #21469: Reduced the risk of false positives in robotparser by
checking to make sure that robots.txt has been read or does not exist
prior to returning True in can_fetch().
- Issue #21321: itertools.islice() now releases the reference to the source
iterator when the slice is exhausted. Patch by Anton Afanasyev.
- Issue #9815: assertRaises now tries to clear references to local variables
in the exception's traceback.
- Issue #13204: Calling sys.flags.__new__ would crash the interpreter,
now it raises a TypeError.
- Issue #19385: Make operations on a closed dbm.dumb database always raise the
same exception.
- Issue #21207: Detect when the os.urandom cached fd has been closed or
replaced, and open it anew.
- Issue #21291: subprocess's Popen.wait() is now thread safe so that
multiple threads may be calling wait() or poll() on a Popen instance
at the same time without losing the Popen.returncode value.
- Issue #21127: Path objects can now be instantiated from str subclass
instances (such as ``numpy.str_``).
- Issue #15002: urllib.response object to use _TemporaryFileWrapper (and
_TemporaryFileCloser) facility. Provides a better way to handle file
descriptor close. Patch contributed by Christian Theune.
- Issue #12220: mindom now raises a custom ValueError indicating it doesn't
support spaces in URIs instead of letting a 'split' ValueError bubble up.
- Issue #21239: patch.stopall() didn't work deterministically when the same
name was patched more than once.
- Issue #21222: Passing name keyword argument to mock.create_autospec now
works.
- Issue #21197: Add lib64 -> lib symlink in venvs on 64-bit non-OS X POSIX.
- Issue #17498: Some SMTP servers disconnect after certain errors, violating
strict RFC conformance. Instead of losing the error code when we issue the
subsequent RSET, smtplib now returns the error code and defers raising the
SMTPServerDisconnected error until the next command is issued.
- Issue #17826: setting an iterable side_effect on a mock function created by
create_autospec now works. Patch by Kushal Das.
- Issue #7776: Fix ``Host:`` header and reconnection when using
http.client.HTTPConnection.set_tunnel(). Patch by Nikolaus Rath.
- Issue #20968: unittest.mock.MagicMock now supports division.
Patch by Johannes Baiter.
- Fix arbitrary memory access in JSONDecoder.raw_decode with a negative second
parameter. Bug reported by Guido Vranken.
- Issue #21169: getpass now handles non-ascii characters that the
input stream encoding cannot encode by re-encoding using the
replace error handler.
- Issue #21171: Fixed undocumented filter API of the rot13 codec.
Patch by Berker Peksag.
- Issue #21172: isinstance check relaxed from dict to collections.Mapping.
- Issue #21155: asyncio.EventLoop.create_unix_server() now raises a ValueError
if path and sock are specified at the same time.
- Issue #21149: Improved thread-safety in logging cleanup during interpreter
shutdown. Thanks to Devin Jeanpierre for the patch.
- Issue #20145: `assertRaisesRegex` and `assertWarnsRegex` now raise a
TypeError if the second argument is not a string or compiled regex.
- Issue #21058: Fix a leak of file descriptor in
:func:`tempfile.NamedTemporaryFile`, close the file descriptor if
:func:`io.open` fails
- Issue #21200: Return None from pkgutil.get_loader() when __spec__ is missing.
- Issue #21013: Enhance ssl.create_default_context() when used for server side
sockets to provide better security by default.
- Issue #20633: Replace relative import by absolute import.
- Issue #20980: Stop wrapping exception when using ThreadPool.
- Issue #21082: In os.makedirs, do not set the process-wide umask. Note this
changes behavior of makedirs when exist_ok=True.
- Issue #20990: Fix issues found by pyflakes for multiprocessing.
- Issue #21015: SSL contexts will now automatically select an elliptic
curve for ECDH key exchange on OpenSSL 1.0.2 and later, and otherwise
default to "prime256v1".
- Issue #20995: Enhance default ciphers used by the ssl module to enable
better security an prioritize perfect forward secrecy.
- Issue #20884: Don't assume that __file__ is defined on importlib.__init__.
- Issue #21499: Ignore __builtins__ in several test_importlib.test_api tests.
- Issue #20879: Delay the initialization of encoding and decoding tables for
base32, ascii85 and base85 codecs in the base64 module, and delay the
initialization of the unquote_to_bytes() table of the urllib.parse module, to
not waste memory if these modules are not used.
- Issue #19157: Include the broadcast address in the usuable hosts for IPv6
in ipaddress.
- Issue #11599: When an external command (e.g. compiler) fails, distutils now
prints out the whole command line (instead of just the command name) if the
environment variable DISTUTILS_DEBUG is set.
- Issue #4931: distutils should not produce unhelpful "error: None" messages
anymore. distutils.util.grok_environment_error is kept but doc-deprecated.
- Issue #20875: Prevent possible gzip "'read' is not defined" NameError.
Patch by Claudiu Popa.
- Issue #11558: ``email.message.Message.attach`` now returns a more
useful error message if ``attach`` is called on a message for which
``is_multipart`` is False.
- Issue #20283: RE pattern methods now accept the string keyword parameters
as documented. The pattern and source keyword parameters are left as
deprecated aliases.
- Issue #20778: Fix modulefinder to work with bytecode-only modules.
- Issue #20791: copy.copy() now doesn't make a copy when the input is
a bytes object. Initial patch by Peter Otten.
- Issue #19748: On AIX, time.mktime() now raises an OverflowError for year
outsize range [1902; 2037].
- Issue #20816: Fix inspect.getcallargs() to raise correct TypeError for
missing keyword-only arguments. Patch by Jeremiah Lowin.
- Issue #20817: Fix inspect.getcallargs() to fail correctly if more
than 3 arguments are missing. Patch by Jeremiah Lowin.
- Issue #6676: Ensure a meaningful exception is raised when attempting
to parse more than one XML document per pyexpat xmlparser instance.
(Original patches by Hirokazu Yamamoto and Amaury Forgeot d'Arc, with
suggested wording by David Gutteridge)
- Issue #21117: Fix inspect.signature to better support functools.partial.
Due to the specifics of functools.partial implementation,
positional-or-keyword arguments passed as keyword arguments become
keyword-only.
- Issue #21209: Fix asyncio.tasks.CoroWrapper to workaround a bug
in yield-from implementation in CPythons prior to 3.4.1.
- asyncio: Add gi_{frame,running,code} properties to CoroWrapper
(upstream issue #163).
- Issue #21311: Avoid exception in _osx_support with non-standard compiler
configurations. Patch by John Szakmeister.
- Issue #11571: Ensure that the turtle window becomes the topmost window
when launched on OS X.
Extension Modules
-----------------
- Issue #21276: posixmodule: Don't define USE_XATTRS on KFreeBSD and the Hurd.
- Issue #21226: Set up modules properly in PyImport_ExecCodeModuleObject
(and friends).
IDLE
----
- Issue #21139: Change default paragraph width to 72, the PEP 8 recommendation.
- Issue #21284: Paragraph reformat test passes after user changes reformat width.
- Issue #17654: Ensure IDLE menus are customized properly on OS X for
non-framework builds and for all variants of Tk.
Build
-----
- The Windows build now includes OpenSSL 1.0.1g
- Issue #21285: Refactor and fix curses configure check to always search
in a ncursesw directory.
- Issue #15234: For BerkelyDB and Sqlite, only add the found library and
include directories if they aren't already being searched. This avoids
an explicit runtime library dependency.
- Issue #20644: OS X installer build support for documentation build changes
in 3.4.1: assume externally supplied sphinx-build is available in /usr/bin.
C API
-----
- Issue #20942: PyImport_ImportFrozenModuleObject() no longer sets __file__ to
match what importlib does; this affects _frozen_importlib as well as any
module loaded using imp.init_frozen().
Documentation
-------------
- Issue #17386: Expanded functionality of the ``Doc/make.bat`` script to make
it much more comparable to ``Doc/Makefile``.
- Issue #21043: Remove the recommendation for specific CA organizations and to
mention the ability to load the OS certificates.
- Issue #20765: Add missing documentation for PurePath.with_name() and
PurePath.with_suffix().
- Issue #19407: New package installation and distribution guides based on
the Python Packaging Authority tools. Existing guides have been retained
as legacy links from the distutils docs, as they still contain some
required reference material for tool developers that isn't recorded
anywhere else.
- Issue #19697: Document cases where __main__.__spec__ is None.
Tests
-----
- Issue #18604: Consolidated checks for GUI availability. All platforms now
at least check whether Tk can be instantiated when the GUI resource is
requested.
- Issue #21275: Fix a socket test on KFreeBSD.
- Issue #21223: Pass test_site/test_startup_imports when some of the extensions
are built as builtins.
- Issue #20635: Added tests for Tk geometry managers.
- Add test case for freeze.
- Issue #20743: Fix a reference leak in test_tcl.
- Issue #21097: Move test_namespace_pkgs into test_importlib.
- Issue #20939: Avoid various network test failures due to new
redirect of http://www.python.org/ to https://www.python.org:
use http://www.example.com instead.
- Issue #20668: asyncio tests no longer rely on tests.txt file.
(Patch by Vajrasky Kok)
- Issue #21093: Prevent failures of ctypes test_macholib on OS X if a
copy of libz exists in $HOME/lib or /usr/local/lib.
Tools/Demos
-----------
- Add support for ``yield from`` to 2to3.
- Add support for the PEP 465 matrix multiplication operator to 2to3.
- Issue #16047: Fix module exception list and __file__ handling in freeze.
Patch by Meador Inge.
- Issue #11824: Consider ABI tags in freeze. Patch by Meador Inge.
- Issue #20535: PYTHONWARNING no longer affects the run_tests.py script.
Patch by Arfrever Frehtes Taifersar Arahesis.
What's New in Python 3.4.0?
===========================
Release date: 2014-03-16
Library
-------
- Issue #20939: Fix test_geturl failure in test_urllibnet due to
new redirect of http://www.python.org/ to https://www.python.org.
Documentation
-------------
- Merge in all documentation changes since branching 3.4.0rc1.
What's New in Python 3.4.0 release candidate 3?
===============================================
Release date: 2014-03-09
Core and Builtins
-----------------
- Issue #20786: Fix signatures for dict.__delitem__ and
property.__delete__ builtins.
Library
-------
- Issue #20839: Don't trigger a DeprecationWarning in the still supported
pkgutil.get_loader() API when __loader__ isn't set on a module (nor
when pkgutil.find_loader() is called directly).
Build
-----
- Issue #14512: Launch pydoc -b instead of pydocgui.pyw on Windows.
- Issue #20748: Uninstalling pip does not leave behind the pyc of
the uninstaller anymore.
- Issue #20568: The Windows installer now installs the unversioned ``pip``
command in addition to the versioned ``pip3`` and ``pip3.4`` commands.
- Issue #20757: The ensurepip helper for the Windows uninstaller now skips
uninstalling pip (rather than failing) if the user has updated pip to a
different version from the one bundled with ensurepip.
- Issue #20465: Update OS X and Windows installer builds to use
SQLite 3.8.3.1.
What's New in Python 3.4.0 release candidate 2?
===============================================
Release date: 2014-02-23
Core and Builtins
-----------------
- Issue #20625: Parameter names in __annotations__ were not mangled properly.
Discovered by Jonas Wielicki, patch by Yury Selivanov.
- Issue #20261: In pickle, lookup __getnewargs__ and __getnewargs_ex__ on the
type of the object.
- Issue #20619: Give the AST nodes of keyword-only arguments a column and line
number.
- Issue #20526: Revert changes of issue #19466 which introduces a regression:
don't clear anymore the state of Python threads early during the Python
shutdown.
Library
-------
- Issue #20710: The pydoc summary line no longer displays the "self" parameter
for bound methods.
- Issue #20566: Change asyncio.as_completed() to use a Queue, to
avoid O(N**2) behavior.
- Issue #20704: Implement new debug API in asyncio. Add new methods
BaseEventLoop.set_debug() and BaseEventLoop.get_debug().
Add support for setting 'asyncio.tasks._DEBUG' variable with
'PYTHONASYNCIODEBUG' environment variable.
- asyncio: Refactoring and fixes: BaseEventLoop.sock_connect() raises an
error if the address is not resolved; use __slots__ in Handle and
TimerHandle; as_completed() and wait() raise TypeError if the passed
list of Futures is a single Future; call_soon() and other 'call_*()'
functions raise TypeError if the passed callback is a coroutine
function; _ProactorBasePipeTransport uses _FlowControlMixin;
WriteTransport.set_write_buffer_size() calls _maybe_pause_protocol()
to consider pausing receiving if the watermark limits have changed;
fix _check_resolved_address() for IPv6 address; and other minor
improvements, along with multiple documentation updates.
- Issue #20684: Fix inspect.getfullargspec() to not to follow __wrapped__
chains. Make its behaviour consistent with bound methods first argument.
Patch by Nick Coghlan and Yury Selivanov.
- Issue #20681: Add new error handling API in asyncio. New APIs:
loop.set_exception_handler(), loop.default_exception_handler(), and
loop.call_exception_handler().
- Issue #20673: Implement support for UNIX Domain Sockets in asyncio.
New APIs: loop.create_unix_connection(), loop.create_unix_server(),
streams.open_unix_connection(), and streams.start_unix_server().
- Issue #20616: Add a format() method to tracemalloc.Traceback.
- Issue #19744: the ensurepip installation step now just prints a warning to
stderr rather than failing outright if SSL/TLS is unavailable. This allows
local installation of POSIX builds without SSL/TLS support.
- Issue #20594: Avoid name clash with the libc function posix_close.
Build
-----
- Issue #20641: Run MSI custom actions (pip installation, pyc compilation)
with the NoImpersonate flag, to support elevated execution (UAC).
- Issue #20221: Removed conflicting (or circular) hypot definition when
compiled with VS 2010 or above. Initial patch by Tabrez Mohammed.
- Issue #20609: Restored the ability to build 64-bit Windows binaries on
32-bit Windows, which was broken by the change in issue #19788.
What's New in Python 3.4.0 release candidate 1?
===============================================
Release date: 2014-02-10
Core and Builtins
-----------------
- Issue #19255: The builtins module is restored to initial value before
cleaning other modules. The sys and builtins modules are cleaned last.
- Issue #20588: Make Python-ast.c C89 compliant.
- Issue #20437: Fixed 22 potential bugs when deleting objects references.
- Issue #20500: Displaying an exception at interpreter shutdown no longer
risks triggering an assertion failure in PyObject_Str.
- Issue #20538: UTF-7 incremental decoder produced inconsistent string when
input was truncated in BASE64 section.
- Issue #20404: io.TextIOWrapper (and hence the open() builtin) now uses the
internal codec marking system added for issue #19619 to throw LookupError
for known non-text encodings at stream construction time. The existing
output type checks remain in place to deal with unmarked third party
codecs.
- Issue #17162: Add PyType_GetSlot.
- Issue #20162: Fix an alignment issue in the siphash24() hash function which
caused a crash on PowerPC 64-bit (ppc64).
Library
-------
- Issue #20530: The signatures for slot builtins have been updated
to reflect the fact that they only accept positional-only arguments.
- Issue #20517: Functions in the os module that accept two filenames
now register both filenames in the exception on failure.
- Issue #20563: The ipaddress module API is now considered stable.
- Issue #14983: email.generator now always adds a line end after each MIME
boundary marker, instead of doing so only when there is an epilogue. This
fixes an RFC compliance bug and solves an issue with signed MIME parts.
- Issue #20540: Fix a performance regression (vs. Python 3.2) when layering
a multiprocessing Connection over a TCP socket. For small payloads, Nagle's
algorithm would introduce idle delays before the entire transmission of a
message.
- Issue #16983: the new email header parsing code will now decode encoded words
that are (incorrectly) surrounded by quotes, and register a defect.
- Issue #19772: email.generator no longer mutates the message object when
doing a down-transform from 8bit to 7bit CTEs.
- Issue #20536: the statistics module now correctly handle Decimal instances
with positive exponents
- Issue #18805: the netmask/hostmask parsing in ipaddress now more reliably
filters out illegal values and correctly allows any valid prefix length.
- Issue #20481: For at least Python 3.4, the statistics module will require
that all inputs for a single operation be of a single consistent type, or
else a mixed of ints and a single other consistent type. This avoids
some interoperability issues that arose with the previous approach of
coercing to a suitable common type.
- Issue #20478: the statistics module now treats collections.Counter inputs
like any other iterable.
- Issue #17369: get_filename was raising an exception if the filename
parameter's RFC2231 encoding was broken in certain ways. This was
a regression relative to python2.
- Issue #20013: Some imap servers disconnect if the current mailbox is
deleted, and imaplib did not handle that case gracefully. Now it
handles the 'bye' correctly.
- Issue #20531: Revert 3.4 version of fix for #19063, and apply the 3.3
version. That is, do *not* raise an error if unicode is passed to
email.message.Message.set_payload.
- Issue #20476: If a non-compat32 policy is used with any of the email parsers,
EmailMessage is now used as the factory class. The factory class should
really come from the policy; that will get fixed in 3.5.
- Issue #19920: TarFile.list() no longer fails when outputs a listing
containing non-encodable characters. Based on patch by Vajrasky Kok.
- Issue #20515: Fix NULL pointer dereference introduced by issue #20368.
- Issue #19186: Restore namespacing of expat symbols inside the pyexpat module.
- Issue #20053: ensurepip (and hence venv) are no longer affected by the
settings in the default pip configuration file.
- Issue #20426: When passing the re.DEBUG flag, re.compile() displays the
debug output every time it is called, regardless of the compilation cache.
- Issue #20368: The null character now correctly passed from Tcl to Python.
Improved error handling in variables-related commands.
- Issue #20435: Fix _pyio.StringIO.getvalue() to take into account newline
translation settings.
- tracemalloc: Fix slicing traces and fix slicing a traceback.
- Issue #20354: Fix an alignment issue in the tracemalloc module on 64-bit
platforms. Bug seen on 64-bit Linux when using "make profile-opt".
- Issue #17159: inspect.signature now accepts duck types of functions,
which adds support for Cython functions. Initial patch by Stefan Behnel.
- Issue #18801: Fix inspect.classify_class_attrs to correctly classify
object.__new__ and object.__init__.
- Fixed cmath.isinf's name in its argument parsing code.
- Issue #20311, #20452: poll and epoll now round the timeout away from zero,
instead of rounding towards zero, in select and selectors modules:
select.epoll.poll(), selectors.PollSelector.poll() and
selectors.EpollSelector.poll(). For example, a timeout of one microsecond
(1e-6) is now rounded to one millisecondi (1e-3), instead of being rounded to
zero. However, the granularity property and asyncio's resolution feature
were removed again.
- asyncio: Some refactoring; various fixes; add write flow control to
unix pipes; Future.set_exception() instantiates the exception
argument if it is a class; improved proactor pipe transport; support
wait_for(f, None); don't log broken/disconnected pipes; use
ValueError instead of assert for forbidden subprocess_{shell,exec}
arguments; added a convenience API for subprocess management; added
StreamReader.at_eof(); properly handle duplicate coroutines/futures
in gather(), wait(), as_completed(); use a bytearray for buffering
in StreamReader; and more.
- Issue #20288: fix handling of invalid numeric charrefs in HTMLParser.
- Issue #20424: Python implementation of io.StringIO now supports lone surrogates.
- Issue #20308: inspect.signature now works on classes without user-defined
__init__ or __new__ methods.
- Issue #20372: inspect.getfile (and a bunch of other inspect functions that
use it) doesn't crash with unexpected AttributeError on classes defined in C
without __module__.
- Issue #20356: inspect.signature formatting uses '/' to separate
positional-only parameters from others.
- Issue #20223: inspect.signature now supports methods defined with
functools.partialmethods.
- Issue #19456: ntpath.join() now joins relative paths correctly when a drive
is present.
- Issue #19077: tempfile.TemporaryDirectory cleanup no longer fails when
called during shutdown. Emitting resource warning in __del__ no longer fails.
Original patch by Antoine Pitrou.
- Issue #20394: Silence Coverity warning in audioop module.
- Issue #20367: Fix behavior of concurrent.futures.as_completed() for
duplicate arguments. Patch by Glenn Langford.
- Issue #8260: The read(), readline() and readlines() methods of
codecs.StreamReader returned incomplete data when were called after
readline() or read(size). Based on patch by Amaury Forgeot d'Arc.
- Issue #20105: the codec exception chaining now correctly sets the
traceback of the original exception as its __traceback__ attribute.
- Issue #17481: inspect.getfullargspec() now uses inspect.signature() API.
- Issue #15304: concurrent.futures.wait() can block forever even if
Futures have completed. Patch by Glenn Langford.
- Issue #14455: plistlib: fix serializing integers in the range
of an unsigned long long but outside of the range of signed long long for
binary plist files.
IDLE
----
- Issue #20406: Use Python application icons for Idle window title bars.
Patch mostly by Serhiy Storchaka.
- Update the python.gif icon for the Idle classbrowser and pathbowser
from the old green snake to the new blue and yellow snakes.
- Issue #17721: Remove non-functional configuration dialog help button until we
make it actually gives some help when clicked. Patch by Guilherme Simões.
Tests
-----
- Issue #20532: Tests which use _testcapi now are marked as CPython only.
- Issue #19920: Added tests for TarFile.list(). Based on patch by Vajrasky Kok.
- Issue #19990: Added tests for the imghdr module. Based on patch by
Claudiu Popa.
- Issue #20474: Fix test_socket "unexpected success" failures on OS X 10.7+.
Tools/Demos
-----------
- Issue #20530: Argument Clinic's signature format has been revised again.
The new syntax is highly human readable while still preventing false
positives. The syntax also extends Python syntax to denote "self" and
positional-only parameters, allowing inspect.Signature objects to be
totally accurate for all supported builtins in Python 3.4.
- Issue #20456: Argument Clinic now observes the C preprocessor conditional
compilation statements of the C files it parses. When a Clinic block is
inside a conditional code, it adjusts its output to match, including
automatically generating an empty methoddef macro.
- Issue #20456: Cloned functions in Argument Clinic now use the correct
name, not the name of the function they were cloned from, for text
strings inside generated code.
- Issue #20456: Fixed Argument Clinic's test suite and "--converters" feature.
- Issue #20456: Argument Clinic now allows specifying different names
for a parameter in Python and C, using "as" on the parameter line.
- Issue #20326: Argument Clinic now uses a simple, unique signature to
annotate text signatures in docstrings, resulting in fewer false
positives. "self" parameters are also explicitly marked, allowing
inspect.Signature() to authoritatively detect (and skip) said parameters.
- Issue #20326: Argument Clinic now generates separate checksums for the
input and output sections of the block, allowing external tools to verify
that the input has not changed (and thus the output is not out-of-date).
Build
-----
- Issue #20465: Update SQLite shipped with OS X installer to 3.8.3.
C-API
-----
- Issue #20517: Added new functions allowing OSError exceptions to reference
two filenames instead of one: PyErr_SetFromErrnoWithFilenameObjects() and
PyErr_SetExcFromWindowsErrWithFilenameObjects().
Documentation
-------------
- Issue #20488: Change wording to say importlib is *the* implementation of
import instead of just *an* implementation.
- Issue #6386: Clarify in the tutorial that specifying a symlink to execute
means the directory containing the executed script and not the symlink is
added to sys.path.
What's New in Python 3.4.0 Beta 3?
==================================
Release date: 2014-01-26
Core and Builtins
-----------------
- Issue #20189: Four additional builtin types (PyTypeObject,
PyMethodDescr_Type, _PyMethodWrapper_Type, and PyWrapperDescr_Type)
have been modified to provide introspection information for builtins.
- Issue #17825: Cursor "^" is correctly positioned for SyntaxError and
IndentationError.
- Issue #2382: SyntaxError cursor "^" is now written at correct position in most
cases when multibyte characters are in line (before "^"). This still not
works correctly with wide East Asian characters.
- Issue #18960: The first line of Python script could be executed twice when
the source encoding was specified on the second line. Now the source encoding
declaration on the second line isn't effective if the first line contains
anything except a comment. 'python -x' works now again with files with the
source encoding declarations, and can be used to make Python batch files
on Windows.
Library
-------
- asyncio: Various improvements and small changes not all covered by
issues listed below. E.g. wait_for() now cancels the inner task if
the timeout occcurs; tweaked the set of exported symbols; renamed
Empty/Full to QueueEmpty/QueueFull; "with (yield from lock)" now
uses a separate context manager; readexactly() raises if not enough
data was read; PTY support tweaks.
- Issue #20311: asyncio: Add a granularity attribute to BaseEventLoop: maximum
between the resolution of the BaseEventLoop.time() method and the resolution
of the selector. The granuarility is used in the scheduler to round time and
deadline.
- Issue #20311: selectors: Add a resolution attribute to BaseSelector.
- Issue #20189: unittest.mock now no longer assumes that any object for
which it could get an inspect.Signature is a callable written in Python.
Fix courtesy of Michael Foord.
- Issue #20317: ExitStack.__exit__ could create a self-referential loop if an
exception raised by a cleanup operation already had its context set
correctly (for example, by the @contextmanager decorator). The infinite
loop this caused is now avoided by checking if the expected context is
already set before trying to fix it.
- Issue #20374: Fix build with GNU readline >= 6.3.
- Issue #20262: Warnings are raised now when duplicate names are added in the
ZIP file or too long ZIP file comment is truncated.
- Issue #20165: The unittest module no longer considers tests marked with
@expectedFailure successful if they pass.
- Issue #18574: Added missing newline in 100-Continue reply from
http.server.BaseHTTPRequestHandler. Patch by Nikolaus Rath.
- Issue #20270: urllib.urlparse now supports empty ports.
- Issue #20243: TarFile no longer raise ReadError when opened in write mode.
- Issue #20238: TarFile opened with external fileobj and "w:gz" mode didn't
write complete output on close.
- Issue #20245: The open functions in the tarfile module now correctly handle
empty mode.
- Issue #20242: Fixed basicConfig() format strings for the alternative
formatting styles. Thanks to kespindler for the bug report and patch.
- Issue #20246: Fix buffer overflow in socket.recvfrom_into.
- Issues #20206 and #5803: Fix edge case in email.quoprimime.encode where it
truncated lines ending in a character needing encoding but no newline by
using a more efficient algorithm that doesn't have the bug.
- Issue #19082: Working xmlrpc.server and xmlrpc.client examples. Both in
modules and in documentation. Initial patch contributed by Vajrasky Kok.
- Issue #20138: The wsgiref.application_uri() and wsgiref.request_uri()
functions now conform to PEP 3333 when handle non-ASCII URLs.
- Issue #19097: Raise the correct Exception when cgi.FieldStorage is given an
invalid fileobj.
- Issue #20152: Ported Python/import.c over to Argument Clinic.
- Issue #13107: argparse and optparse no longer raises an exception when output
a help on environment with too small COLUMNS. Based on patch by
Elazar Gershuni.
- Issue #20207: Always disable SSLv2 except when PROTOCOL_SSLv2 is explicitly
asked for.
- Issue #18960: The tokenize module now ignore the source encoding declaration
on the second line if the first line contains anything except a comment.
- Issue #20078: Reading malformed zipfiles no longer hangs with 100% CPU
consumption.
- Issue #20113: os.readv() and os.writev() now raise an OSError exception on
error instead of returning -1.
- Issue #19719: Make importlib.abc.MetaPathFinder.find_module(),
PathEntryFinder.find_loader(), and Loader.load_module() use PEP 451 APIs to
help with backwards-compatibility.
- Issue #20144: inspect.Signature now supports parsing simple symbolic
constants as parameter default values in __text_signature__.
- Issue #20072: Fixed multiple errors in tkinter with wantobjects is False.
- Issue #20229: Avoid plistlib deprecation warning in platform.mac_ver().
- Issue #14455: Fix some problems with the new binary plist support in plistlib.
IDLE
----
- Issue #17390: Add Python version to Idle editor window title bar.
Original patches by Edmond Burnett and Kent Johnson.
- Issue #18960: IDLE now ignores the source encoding declaration on the second
line if the first line contains anything except a comment.
Tests
-----
- Issue #20358: Tests for curses.window.overlay and curses.window.overwrite
no longer specify min{row,col} > max{row,col}.
- Issue #19804: The test_find_mac test in test_uuid is now skipped if the
ifconfig executable is not available.
- Issue #19886: Use better estimated memory requirements for bigmem tests.
Tools/Demos
-----------
- Issue #20390: Argument Clinic's "file" output preset now defaults to
"{dirname}/clinic/{basename}.h".
- Issue #20390: Argument Clinic's "class" directive syntax has been extended
with two new required arguments: "typedef" and "type_object".
- Issue #20390: Argument Clinic: If __new__ or __init__ functions didn't use
kwargs (or args), the PyArg_NoKeywords (or PyArg_NoPositional) calls
generated are only run when the type object is an exact match.
- Issue #20390: Argument Clinic now fails if you have required parameters after
optional parameters.
- Issue #20390: Argument Clinic converters now have a new template they can
inject code into: "modifiers". Code put there is run in the parsing
function after argument parsing but before the call to the impl.
- Issue #20376: Argument Clinic now escapes backslashes in docstrings.
- Issue #20381: Argument Clinic now sanity checks the default argument when
c_default is also specified, providing a nice failure message for
disallowed values.
- Issue #20189: Argument Clinic now ensures that parser functions for
__new__ are always of type newfunc, the type of the tp_new slot.
Similarly, parser functions for __init__ are now always of type initproc,
the type of tp_init.
- Issue #20189: Argument Clinic now suppresses the docstring for __new__
and __init__ functions if no docstring is provided in the input.
- Issue #20189: Argument Clinic now suppresses the "self" parameter in the
impl for @staticmethod functions.
- Issue #20294: Argument Clinic now supports argument parsing for __new__ and
__init__ functions.
- Issue #20299: Argument Clinic custom converters may now change the default
value of c_default and py_default with a class member.
- Issue #20287: Argument Clinic's output is now configurable, allowing
delaying its output or even redirecting it to a separate file.
- Issue #20226: Argument Clinic now permits simple expressions
(e.g. "sys.maxsize - 1") as default values for parameters.
- Issue #19936: Added executable bits or shebang lines to Python scripts which
requires them. Disable executable bits and shebang lines in test and
benchmark files in order to prevent using a random system python, and in
source files of modules which don't provide command line interface. Fixed
shebang lines in the unittestgui and checkpip scripts.
- Issue #20268: Argument Clinic now supports cloning the parameters and
return converter of existing functions.
- Issue #20228: Argument Clinic now has special support for class special
methods.
- Issue #20214: Fixed a number of small issues and documentation errors in
Argument Clinic (see issue for details).
- Issue #20196: Fixed a bug where Argument Clinic did not generate correct
parsing code for functions with positional-only parameters where all arguments
are optional.
- Issue #18960: 2to3 and the findnocoding.py script now ignore the source
encoding declaration on the second line if the first line contains anything
except a comment.
- Issue #19723: The marker comments Argument Clinic uses have been changed
to improve readability.
- Issue #20157: When Argument Clinic renames a parameter because its name
collides with a C keyword, it no longer exposes that rename to PyArg_Parse.
- Issue #20141: Improved Argument Clinic's support for the PyArg_Parse "O!"
format unit.
- Issue #20144: Argument Clinic now supports simple symbolic constants
as parameter default values.
- Issue #20143: The line numbers reported in Argument Clinic errors are
now more accurate.
- Issue #20142: Py_buffer variables generated by Argument Clinic are now
initialized with a default value.
Build
-----
- Issue #12837: Silence a tautological comparison warning on OS X under Clang in
socketmodule.c.
What's New in Python 3.4.0 Beta 2?
==================================
Release date: 2014-01-05
Core and Builtins
-----------------
- Issue #17432: Drop UCS2 from names of Unicode functions in python3.def.
- Issue #19526: Exclude all new API from the stable ABI. Exceptions can be
made if a need is demonstrated.
- Issue #19969: PyBytes_FromFormatV() now raises an OverflowError if "%c"
argument is not in range [0; 255].
- Issue #19995: %c, %o, %x, and %X now issue a DeprecationWarning on non-integer
input; reworded docs to clarify that an integer type should define both __int__
and __index__.
- Issue #19787: PyThread_set_key_value() now always set the value. In Python
3.3, the function did nothing if the key already exists (if the current value
is a non-NULL pointer).
- Issue #14432: Remove the thread state field from the frame structure. Fix a
crash when a generator is created in a C thread that is destroyed while the
generator is still used. The issue was that a generator contains a frame, and
the frame kept a reference to the Python state of the destroyed C thread. The
crash occurs when a trace function is setup.
- Issue #19576: PyGILState_Ensure() now initializes threads. At startup, Python
has no concrete GIL. If PyGILState_Ensure() is called from a new thread for
the first time and PyEval_InitThreads() was not called yet, a GIL needs to be
created.
- Issue #17576: Deprecation warning emitted now when __int__() or __index__()
return not int instance.
- Issue #19932: Fix typo in import.h, missing whitespaces in function prototypes.
- Issue #19736: Add module-level statvfs constants defined for GNU/glibc
based systems.
- Issue #20097: Fix bad use of "self" in importlib's WindowsRegistryFinder.
- Issue #19729: In str.format(), fix recursive expansion in format spec.
- Issue #19638: Fix possible crash / undefined behaviour from huge (more than 2
billion characters) input strings in _Py_dg_strtod.
Library
-------
- Issue #20154: Deadlock in asyncio.StreamReader.readexactly().
- Issue #16113: Remove sha3 module again.
- Issue #20111: pathlib.Path.with_suffix() now sanity checks the given suffix.
- Fix breakage in TestSuite.countTestCases() introduced by issue #11798.
- Issue #20108: Avoid parameter name clash in inspect.getcallargs().
- Issue #19918: Fix PurePath.relative_to() under Windows.
- Issue #19422: Explicitly disallow non-SOCK_STREAM sockets in the ssl
module, rather than silently let them emit clear text data.
- Issue #20046: Locale alias table no longer contains entities which can be
calculated. Generalized support of the euro modifier.
- Issue #20027: Fixed locale aliases for devanagari locales.
- Issue #20067: Tkinter variables now work when wantobjects is false.
- Issue #19020: Tkinter now uses splitlist() instead of split() in configure
methods.
- Issue #19744: ensurepip now provides a better error message when Python is
built without SSL/TLS support (pip currently requires that support to run,
even if only operating with local wheel files)
- Issue #19734: ensurepip now ignores all pip environment variables to avoid
odd behaviour based on user configuration settings
- Fix TypeError on "setup.py upload --show-response".
- Issue #20045: Fix "setup.py register --list-classifiers".
- Issue #18879: When a method is looked up on a temporary file, avoid closing
the file before the method is possibly called.
- Issue #20037: Avoid crashes when opening a text file late at interpreter
shutdown.
- Issue #19967: Thanks to the PEP 442, asyncio.Future now uses a
destructor to log uncaught exceptions, instead of the dedicated
_TracebackLogger class.
- Added a Task.current_task() class method to asyncio.
- Issue #19850: Set SA_RESTART in asyncio when registering a signal
handler to limit EINTR occurrences.
- Implemented write flow control in asyncio for proactor event loop (Windows).
- Change write buffer in asyncio use to avoid O(N**2) behavior. Make
write()/sendto() accept bytearray/memoryview.
- Issue #20034: Updated alias mapping to most recent locale.alias file
from X.org distribution using makelocalealias.py.
- Issue #5815: Fixed support for locales with modifiers. Fixed support for
locale encodings with hyphens.
- Issue #20026: Fix the sqlite module to handle correctly invalid isolation
level (wrong type).
- Issue #18829: csv.Dialect() now checks type for delimiter, escapechar and
quotechar fields. Original patch by Vajrasky Kok.
- Issue #19855: uuid.getnode() on Unix now looks on the PATH for the
executables used to find the mac address, with /sbin and /usr/sbin as
fallbacks.
- Issue #20007: HTTPResponse.read(0) no more prematurely closes connection.
Original patch by Simon Sapin.
- Issue #19946: multiprocessing now uses runpy to initialize __main__ in
child processes when necessary, allowing it to correctly handle scripts
without suffixes and submodules that use explicit relative imports or
otherwise rely on parent modules being correctly imported prior to
execution.
- Issue #19921: When Path.mkdir() is called with parents=True, any missing
parent is created with the default permissions, ignoring the mode argument
(mimicking the POSIX "mkdir -p" command).
- Issue #19887: Improve the Path.resolve() algorithm to support certain
symlink chains.
- Issue #19912: Fixed numerous bugs in ntpath.splitunc().
- Issue #19911: ntpath.splitdrive() now correctly processes the 'İ' character
(U+0130, LATIN CAPITAL LETTER I WITH DOT ABOVE).
- Issue #19532: python -m compileall with no filename/directory arguments now
respects the -f and -q flags instead of ignoring them.
- Issue #19623: Fixed writing to unseekable files in the aifc module.
- Issue #19946: multiprocessing.spawn now raises ImportError when the module to
be used as the main module cannot be imported.
- Issue #17919: select.poll.register() again works with poll.POLLNVAL on AIX.
Fixed integer overflow in the eventmask parameter.
- Issue #19063: if a Charset's body_encoding was set to None, the email
package would generate a message claiming the Content-Transfer-Encoding
was 7bit, and produce garbage output for the content. This now works.
A couple of other set_payload mishandlings of non-ASCII are also fixed.
In addition, calling set_payload with a string argument without
specifying a charset now raises an error (this is a new error in 3.4).
- Issue #15475: Add __sizeof__ implementations for itertools objects.
- Issue #19944: Fix importlib.find_spec() so it imports parents as needed
and move the function to importlib.util.
- Issue #19880: Fix a reference leak in unittest.TestCase. Explicitly break
reference cycles between frames and the _Outcome instance.
- Issue #17429: platform.linux_distribution() now decodes files from the UTF-8
encoding with the surrogateescape error handler, instead of decoding from the
locale encoding in strict mode. It fixes the function on Fedora 19 which is
probably the first major distribution release with a non-ASCII name. Patch
written by Toshio Kuratomi.
- Issue #19343: Expose FreeBSD-specific APIs in resource module. Original
patch by Koobs.
- Issue #19929: Call os.read with 32768 within subprocess.Popen.communicate
rather than 4096 for efficiency. A microbenchmark shows Linux and OS X
both using ~50% less cpu time this way.
- Issue #19506: Use a memoryview to avoid a data copy when piping data
to stdin within subprocess.Popen.communicate. 5-10% less cpu usage.
- Issue #19876: selectors unregister() no longer raises ValueError or OSError
if the FD is closed (as long as it was registered).
- Issue #19908: pathlib now joins relative Windows paths correctly when a drive
is present. Original patch by Antoine Pitrou.
- Issue #19296: Silence compiler warning in dbm_open
- Issue #6784: Strings from Python 2 can now be unpickled as bytes
objects by setting the encoding argument of Unpickler to be 'bytes'.
Initial patch by Merlijn van Deen.
- Issue #19839: Fix regression in bz2 module's handling of non-bzip2 data at
EOF, and analogous bug in lzma module.
- Issue #19881: Fix pickling bug where cpickle would emit bad pickle data for
large bytes string (i.e., with size greater than 2**32-1).
- Issue #19138: doctest's IGNORE_EXCEPTION_DETAIL now allows a match when
no exception detail exists (no colon following the exception's name, or
a colon does follow but no text follows the colon).
- Issue #19927: Add __eq__ to path-based loaders in importlib.
- Issue #19827: On UNIX, setblocking() and settimeout() methods of
socket.socket can now avoid a second syscall if the ioctl() function can be
used, or if the non-blocking flag of the socket is unchanged.
- Issue #19785: smtplib now supports SSLContext.check_hostname and server name
indication for TLS/SSL connections.
- Issue #19784: poplib now supports SSLContext.check_hostname and server name
indication for TLS/SSL connections.
- Issue #19783: nntplib now supports SSLContext.check_hostname and server name
indication for TLS/SSL connections.
- Issue #19782: imaplib now supports SSLContext.check_hostname and server name
indication for TLS/SSL connections.
- Issue #20123: Fix pydoc.synopsis() for "binary" modules.
- Issue #19834: Support unpickling of exceptions pickled by Python 2.
- Issue #19781: ftplib now supports SSLContext.check_hostname and server name
indication for TLS/SSL connections.
- Issue #19509: Add SSLContext.check_hostname to match the peer's certificate
with server_hostname on handshake.
- Issue #15798: Fixed subprocess.Popen() to no longer fail if file
descriptor 0, 1 or 2 is closed.
- Issue #17897: Optimized unpickle prefetching.
- Issue #3693: Make the error message more helpful when the array.array()
constructor is given a str. Move the array module typecode documentation to
the docstring of the constructor.
- Issue #19088: Fixed incorrect caching of the copyreg module in
object.__reduce__() and object.__reduce_ex__().
- Issue #19698: Removed exec_module() methods from
importlib.machinery.BuiltinImporter and ExtensionFileLoader.
- Issue #18864: Added a setter for ModuleSpec.has_location.
- Fixed _pickle.Unpickler to not fail when loading empty strings as
persistent IDs.
- Issue #11480: Fixed copy.copy to work with classes with custom metaclasses.
Patch by Daniel Urban.
- Issue #6477: Added support for pickling the types of built-in singletons
(i.e., Ellipsis, NotImplemented, None).
- Issue #19713: Add remaining PEP 451-related deprecations and move away
from using find_module/find_loaer/load_module.
- Issue #19708: Update pkgutil to use the new importer APIs.
- Issue #19703: Update pydoc to use the new importer APIs.
- Issue #19851: Fixed a regression in reloading sub-modules.
- ssl.create_default_context() sets OP_NO_COMPRESSION to prevent CRIME.
- Issue #19802: Add socket.SO_PRIORITY.
- Issue #11508: Fixed uuid.getnode() and uuid.uuid1() on environment with
virtual interface. Original patch by Kent Frazier.
- Issue #11489: JSON decoder now accepts lone surrogates.
- Issue #19545: Avoid chained exceptions while passing stray % to
time.strptime(). Initial patch by Claudiu Popa.
IDLE
----
- Issue #20058: sys.stdin.readline() in IDLE now always returns only one line.
- Issue #19481: print() of string subclass instance in IDLE no longer hangs.
- Issue #18270: Prevent possible IDLE AttributeError on OS X when no initial
shell window is present.
Tests
-----
- Issue #20055: Fix test_shutil under Windows with symlink privileges held.
Patch by Vajrasky Kok.
- Issue #20070: Don't run test_urllib2net when network resources are not
enabled.
- Issue #19938: Re-enabled test_bug_1333982 in test_dis, which had been
disabled since 3.0 due to the changes in listcomp handling.
- Issue #19320: test_tcl no longer fails when wantobjects is false.
- Issue #19919: Fix flaky SSL test. connect_ex() sometimes returns
EWOULDBLOCK on Windows or VMs hosted on Windows.
- Issue #19912: Added tests for ntpath.splitunc().
- Issue #19828: Fixed test_site when the whole suite is run with -S.
- Issue #19928: Implemented a test for repr() of cell objects.
- Issue #19535: Fixed test_docxmlrpc, test_functools, test_inspect, and
test_statistics when python is run with -OO.
- Issue #19926: Removed unneeded test_main from test_abstract_numbers.
Patch by Vajrasky Kok.
- Issue #19572: More skipped tests explicitly marked as skipped.
- Issue #19595, #19987: Re-enabled a long-disabled test in test_winsound.
- Issue #19588: Fixed tests in test_random that were silently skipped most
of the time. Patch by Julian Gindi.
Build
-----
- Issue #19728: Enable pip installation by default on Windows.
- Issue #16136: Remove VMS support
- Issue #18215: Add script Tools/ssl/test_multiple_versions.py to compile and
run Python's unit tests with multiple versions of OpenSSL.
- Issue #19922: define _INCLUDE__STDC_A1_SOURCE in HP-UX to include mbstate_t
for mbrtowc().
- Issue #19788: kill_python(_d).exe is now run as a PreBuildEvent on the
pythoncore sub-project. This should prevent build errors due a previous
build's python(_d).exe still running.
Documentation
-------------
- Issue #20265: Updated some parts of the Using Windows document.
- Issue #20266: Updated some parts of the Windows FAQ.
- Issue #20255: Updated the about and bugs pages.
- Issue #20253: Fixed a typo in the ipaddress docs that advertised an
illegal attribute name. Found by INADA Naoki.
- Issue #18840: Introduce the json module in the tutorial, and de-emphasize
the pickle module.
- Issue #19845: Updated the Compiling Python on Windows section.
- Issue #19795: Improved markup of True/False constants.
Tools/Demos
-----------
- Issue #19659: Added documentation for Argument Clinic.
- Issue #19976: Argument Clinic METH_NOARGS functions now always
take two parameters.
What's New in Python 3.4.0 Beta 1?
==================================
Release date: 2013-11-24
Core and Builtins
-----------------
- Use the repr of a module name in more places in import, especially
exceptions.
- Issue #19619: str.encode, bytes.decode and bytearray.decode now use an
internal API to throw LookupError for known non-text encodings, rather
than attempting the encoding or decoding operation and then throwing a
TypeError for an unexpected output type. (The latter mechanism remains
in place for third party non-text encodings)
- Issue #19183: Implement PEP 456 'secure and interchangeable hash algorithm'.
Python now uses SipHash24 on all major platforms.
- Issue #12892: The utf-16* and utf-32* encoders no longer allow surrogate code
points (U+D800-U+DFFF) to be encoded. The utf-32* decoders no longer decode
byte sequences that correspond to surrogate code points. The surrogatepass
error handler now works with the utf-16* and utf-32* codecs. Based on
patches by Victor Stinner and Kang-Hao (Kenny) Lu.
- Issue #17806: Added keyword-argument support for "tabsize" to
str/bytes.expandtabs().
- Issue #17828: Output type errors in str.encode(), bytes.decode() and
bytearray.decode() now direct users to codecs.encode() or codecs.decode()
as appropriate.
- Issue #17828: The interpreter now attempts to chain errors that occur in
codec processing with a replacement exception of the same type that
includes the codec name in the error message. It ensures it only does this
when the creation of the replacement exception won't lose any information.
- Issue #19466: Clear the frames of daemon threads earlier during the
Python shutdown to call objects destructors. So "unclosed file" resource
warnings are now corretly emitted for daemon threads.
- Issue #19514: Deduplicate some _Py_IDENTIFIER declarations.
Patch by Andrei Dorian Duma.
- Issue #17936: Fix O(n**2) behaviour when adding or removing many subclasses
of a given type.
- Issue #19428: zipimport now handles errors when reading truncated or invalid
ZIP archive.
- Issue #18408: Add a new PyFrame_FastToLocalsWithError() function to handle
exceptions when merging fast locals into f_locals of a frame.
PyEval_GetLocals() now raises an exception and return NULL on failure.
- Issue #19369: Optimized the usage of __length_hint__().
- Issue #18603: Ensure that PyOS_mystricmp and PyOS_mystrnicmp are in the
Python executable and not removed by the linker's optimizer.
- Issue #19306: Add extra hints to the faulthandler module's stack
dumps that these are "upside down".
Library
-------
- Issue #3158: doctest can now find doctests in functions and methods
written in C.
- Issue #13477: Added command line interface to the tarfile module.
Original patch by Berker Peksag.
- Issue #19674: inspect.signature() now produces a correct signature
for some builtins.
- Issue #19722: Added opcode.stack_effect(), which
computes the stack effect of bytecode instructions.
- Issue #19735: Implement private function ssl._create_stdlib_context() to
create SSLContext objects in Python's stdlib module. It provides a single
configuration point and makes use of SSLContext.load_default_certs().
- Issue #16203: Add re.fullmatch() function and regex.fullmatch() method,
which anchor the pattern at both ends of the string to match.
Original patch by Matthew Barnett.
- Issue #13592: Improved the repr for regular expression pattern objects.
Based on patch by Hugo Lopes Tavares.
- Issue #19641: Added the audioop.byteswap() function to convert big-endian
samples to little-endian and vice versa.
- Issue #15204: Deprecated the 'U' mode in file-like objects.
- Issue #17810: Implement PEP 3154, pickle protocol 4.
- Issue #19668: Added support for the cp1125 encoding.
- Issue #19689: Add ssl.create_default_context() factory function. It creates
a new SSLContext object with secure default settings.
- Issue #19727: os.utime(..., None) is now potentially more precise
under Windows.
- Issue #17201: ZIP64 extensions now are enabled by default. Patch by
William Mallard.
- Issue #19292: Add SSLContext.load_default_certs() to load default root CA
certificates from default stores or system stores. By default the method
loads CA certs for authentication of server certs.
- Issue #19673: Add pathlib to the stdlib as a provisional module (PEP 428).
- Issue #16596: pdb in a generator now properly skips over yield and
yield from rather than stepping out of the generator into its
caller. (This is essential for stepping through asyncio coroutines.)
- Issue #17916: Added dis.Bytecode.from_traceback() and
dis.Bytecode.current_offset to easily display "current instruction"
markers in the new disassembly API (Patch by Claudiu Popa).
- Issue #19552: venv now supports bootstrapping pip into virtual environments
- Issue #17134: Finalize interface to Windows' certificate store. Cert and
CRL enumeration are now two functions. enum_certificates() also returns
purpose flags as set of OIDs.
- Issue #19555: Restore sysconfig.get_config_var('SO'), (and the distutils
equivalent) with a DeprecationWarning pointing people at $EXT_SUFFIX.
- Issue #8813: Add SSLContext.verify_flags to change the verification flags
of the context in order to enable certification revocation list (CRL)
checks or strict X509 rules.
- Issue #18294: Fix the zlib module to make it 64-bit safe.
- Issue #19682: Fix compatibility issue with old version of OpenSSL that
was introduced by Issue #18379.
- Issue #14455: plistlib now supports binary plists and has an updated API.
- Issue #19633: Fixed writing not compressed 16- and 32-bit wave files on
big-endian platforms.
- Issue #18379: SSLSocket.getpeercert() returns CA issuer AIA fields, OCSP
and CRL distribution points.
- Issue #18138: Implement cadata argument of SSLContext.load_verify_location()
to load CA certificates and CRL from memory. It supports PEM and DER
encoded strings.
- Issue #18775: Add name and block_size attribute to HMAC object. They now
provide the same API elements as non-keyed cryptographic hash functions.
- Issue #17276: MD5 as default digestmod for HMAC is deprecated. The HMAC
module supports digestmod names, e.g. hmac.HMAC('sha1').
- Issue #19449: in csv's writerow, handle non-string keys when generating the
error message that certain keys are not in the 'fieldnames' list.
- Issue #13633: Added a new convert_charrefs keyword arg to HTMLParser that,
when True, automatically converts all character references.
- Issue #2927: Added the unescape() function to the html module.
- Issue #8402: Added the escape() function to the glob module.
- Issue #17618: Add Base85 and Ascii85 encoding/decoding to the base64 module.
- Issue #19634: time.strftime("%y") now raises a ValueError on AIX when given a
year before 1900.
- Fix test.support.bind_port() to not cause an error when Python was compiled
on a system with SO_REUSEPORT defined in the headers but run on a system
with an OS kernel that does not support that reasonably new socket option.
- Fix compilation error under gcc of the ctypes module bundled libffi for arm.
- Issue #19448: Add private API to SSL module to lookup ASN.1 objects by OID,
NID, short name and long name.
- Issue #19282: dbm.open now supports the context management protocol. (Inital
patch by Claudiu Popa)
- Issue #8311: Added support for writing any bytes-like objects in the aifc,
sunau, and wave modules.
- Issue #5202: Added support for unseekable files in the wave module.
- Issue #19544 and Issue #1180: Restore global option to ignore
~/.pydistutils.cfg in Distutils, accidentally removed in backout of
distutils2 changes.
- Issue #19523: Closed FileHandler leak which occurred when delay was set.
- Issue #19544 and Issue #6516: Restore support for --user and --group
parameters to sdist command accidentally rolled back as part of the
distutils2 rollback.
- Issue #13674: Prevented time.strftime from crashing on Windows when given
a year before 1900 and a format of %y.
- Issue #19406: implementation of the ensurepip module (part of PEP 453).
Patch by Donald Stufft and Nick Coghlan.
- Issue #19544 and Issue #6286: Restore use of urllib over http allowing use
of http_proxy for Distutils upload command, a feature accidentally lost
in the rollback of distutils2.
- Issue #19544 and Issue #7457: Restore the read_pkg_file method to
distutils.dist.DistributionMetadata accidentally removed in the undo of
distutils2.
- Issue #16685: Added support for any bytes-like objects in the audioop module.
Removed support for strings.
- Issue #7171: Add Windows implementation of ``inet_ntop`` and ``inet_pton``
to socket module. Patch by Atsuo Ishimoto.
- Issue #19261: Added support for writing 24-bit samples in the sunau module.
- Issue #1097797: Added CP273 encoding, used on IBM mainframes in
Germany and Austria. Mapping provided by Michael Bierenfeld.
- Issue #1575020: Fixed support of 24-bit wave files on big-endian platforms.
- Issue #19378: Fixed a number of cases in the dis module where the new
"file" parameter was not being honoured correctly
- Issue #19378: Removed the "dis.Bytecode.show_info" method
- Issue #19378: Renamed the "dis.Bytecode.display_code" method to
"dis.Bytecode.dis" and converted it to returning a string rather than
printing output.
- Issue #19378: the "line_offset" parameter in the new "dis.get_instructions"
API has been renamed to "first_line" (and the default value and usage
changed accordingly). This should reduce confusion with the more common use
of "offset" in the dis docs to refer to bytecode offsets.
- Issue #18678: Corrected spwd struct member names in spwd module:
sp_nam->sp_namp, and sp_pwd->sp_pwdp. The old names are kept as extra
structseq members, for backward compatibility.
- Issue #6157: Fixed tkinter.Text.debug(). tkinter.Text.bbox() now raises
TypeError instead of TclError on wrong number of arguments. Original patch
by Guilherme Polo.
- Issue #10197: Rework subprocess.get[status]output to use subprocess
functionality and thus to work on Windows. Patch by Nick Coghlan
- Issue #6160: The bbox() method of tkinter.Spinbox now returns a tuple of
integers instead of a string. Based on patch by Guilherme Polo.
- Issue #19403: contextlib.redirect_stdout is now reentrant
- Issue #19286: Directories in ``package_data`` are no longer added to
the filelist, preventing failure outlined in the ticket.
- Issue #19480: HTMLParser now accepts all valid start-tag names as defined
by the HTML5 standard.
- Issue #15114: The html.parser module now raises a DeprecationWarning when the
strict argument of HTMLParser or the HTMLParser.error method are used.
- Issue #19410: Undo the special-casing removal of '' for
importlib.machinery.FileFinder.
- Issue #19424: Fix the warnings module to accept filename containing surrogate
characters.
- Issue #19435: Fix directory traversal attack on CGIHttpRequestHandler.
- Issue #19227: Remove pthread_atfork() handler. The handler was added to
solve #18747 but has caused issues.
- Issue #19420: Fix reference leak in module initalization code of
_hashopenssl.c
- Issue #19329: Optimized compiling charsets in regular expressions.
- Issue #19227: Try to fix deadlocks caused by re-seeding then OpenSSL
pseudo-random number generator on fork().
- Issue #16037: HTTPMessage.readheaders() raises an HTTPException when more than
100 headers are read. Adapted from patch by Jyrki Pulliainen.
- Issue #16040: CVE-2013-1752: nntplib: Limit maximum line lengths to 2048 to
prevent readline() calls from consuming too much memory. Patch by Jyrki
Pulliainen.
- Issue #16041: CVE-2013-1752: poplib: Limit maximum line lengths to 2048 to
prevent readline() calls from consuming too much memory. Patch by Jyrki
Pulliainen.
- Issue #17997: Change behavior of ``ssl.match_hostname()`` to follow RFC 6125,
for security reasons. It now doesn't match multiple wildcards nor wildcards
inside IDN fragments.
- Issue #16039: CVE-2013-1752: Change use of readline in imaplib module to limit
line length. Patch by Emil Lind.
- Issue #19330: the unnecessary wrapper functions have been removed from the
implementations of the new contextlib.redirect_stdout and
contextlib.suppress context managers, which also ensures they provide
reasonable help() output on instances
- Issue #19393: Fix symtable.symtable function to not be confused when there are
functions or classes named "top".
- Issue #18685: Restore re performance to pre-PEP 393 levels.
- Issue #19339: telnetlib module is now using time.monotonic() when available
to compute timeout.
- Issue #19399: fix sporadic test_subprocess failure.
- Issue #13234: Fix os.listdir to work with extended paths on Windows.
Patch by Santoso Wijaya.
- Issue #19375: The site module adding a "site-python" directory to sys.path,
if it exists, is now deprecated.
- Issue #19379: Lazily import linecache in the warnings module, to make
startup with warnings faster until a warning gets printed.
- Issue #19288: Fixed the "in" operator of dbm.gnu databases for string
argument. Original patch by Arfrever Frehtes Taifersar Arahesis.
- Issue #19287: Fixed the "in" operator of dbm.ndbm databases for string
argument. Original patch by Arfrever Frehtes Taifersar Arahesis.
- Issue #19327: Fixed the working of regular expressions with too big charset.
- Issue #17400: New 'is_global' attribute for ipaddress to tell if an address
is allocated by IANA for global or private networks.
- Issue #19350: Increasing the test coverage of macurl2path. Patch by Colin
Williams.
- Issue #19365: Optimized the parsing of long replacement string in re.sub*()
functions.
- Issue #19352: Fix unittest discovery when a module can be reached
through several paths (e.g. under Debian/Ubuntu with virtualenv).
- Issue #15207: Fix mimetypes to read from correct part of Windows registry
Original patch by Dave Chambers
- Issue #16595: Add prlimit() to resource module.
- Issue #19324: Expose Linux-specific constants in resource module.
- Load SSL's error strings in hashlib.
- Issue #18527: Upgrade internal copy of zlib to 1.2.8.
- Issue #19274: Add a filterfunc parameter to PyZipFile.writepy.
- Issue #8964: fix platform._sys_version to handle IronPython 2.6+.
Patch by Martin Matusiak.
- Issue #19413: Restore pre-3.3 reload() semantics of re-finding modules.
- Issue #18958: Improve error message for json.load(s) while passing a string
that starts with a UTF-8 BOM.
- Issue #19307: Improve error message for json.load(s) while passing objects
of the wrong type.
- Issue #16038: CVE-2013-1752: ftplib: Limit amount of data read by
limiting the call to readline(). Original patch by Michał
Jastrzębski and Giampaolo Rodola.
- Issue #17087: Improved the repr for regular expression match objects.
Tests
-----
- Issue #19664: test_userdict's repr test no longer depends on the order
of dict elements.
- Issue #19440: Clean up test_capi by removing an unnecessary __future__
import, converting from test_main to unittest.main, and running the
_testcapi module tests as subTests of a unittest TestCase method.
- Issue #19378: the main dis module tests are now run with both stdout
redirection *and* passing an explicit file parameter
- Issue #19378: removed the not-actually-helpful assertInstructionMatches
and assertBytecodeExactlyMatches helpers from bytecode_helper
- Issue #18702: All skipped tests now reported as skipped.
- Issue #19439: interpreter embedding tests are now executed on Windows
(Patch by Zachary Ware)
- Issue #19085: Added basic tests for all tkinter widget options.
- Issue #19384: Fix test_py_compile for root user, patch by Claudiu Popa.
Documentation
-------------
- Issue #18326: Clarify that list.sort's arguments are keyword-only. Also,
attempt to reduce confusion in the glossary by not saying there are
different "types" of arguments and parameters.
Build
-----
- Issue #19358: "make clinic" now runs the Argument Clinic preprocessor
over all CPython source files.
- Update SQLite to 3.8.1, xz to 5.0.5, and Tcl/Tk to 8.6.1 on Windows.
- Issue #16632: Enable DEP and ASLR on Windows.
- Issue #17791: Drop PREFIX and EXEC_PREFIX definitions from PC/pyconfig.h
- Add workaround for VS 2010 nmake clean issue. VS 2010 doesn't set up PATH
for nmake.exe correctly.
- Issue #19550: Implement Windows installer changes of PEP 453 (ensurepip).
- Issue #19520: Fix compiler warning in the _sha3 module on 32bit Windows.
- Issue #19356: Avoid using a C variabled named "_self", it's a reserved
word in some C compilers.
- Issue #15792: Correct build options on Win64. Patch by Jeremy Kloth.
- Issue #19373: Apply upstream change to Tk 8.5.15 fixing OS X 10.9
screen refresh problem for OS X installer build.
- Issue #19649: On OS X, the same set of file names are now installed
in bin directories for all configurations: non-framework vs framework,
and single arch vs universal builds. pythonx.y-32 is now always
installed for 64-bit/32-bit universal builds. The obsolete and
undocumented pythonw* symlinks are no longer installed anywhere.
- Issue #19553: PEP 453 - "make install" and "make altinstall" now install or
upgrade pip by default, using the bundled pip provided by the new ensurepip
module. A new configure option, --with-ensurepip[=upgrade|install|no], is
available to override the default ensurepip "--upgrade" option. The option
can also be set with "make [alt]install ENSUREPIP=[upgrade|install\no]".
- Issue #19551: PEP 453 - the OS X installer now installs pip by default.
- Update third-party libraries for OS X installers: xz 5.0.3 -> 5.0.5,
SQLite 3.7.13 -> 3.8.1
- Issue #15663: Revert OS X installer built-in Tcl/Tk support for 3.4.0b1.
Some third-party projects, such as Matplotlib and PIL/Pillow,
depended on being able to build with Tcl and Tk frameworks in
/Library/Frameworks.
Tools/Demos
-----------
- Issue #19730: Argument Clinic now supports all the existing PyArg
"format units" as legacy converters, as well as two new features:
"self converters" and the "version" directive.
- Issue #19552: pyvenv now bootstraps pip into virtual environments by
default (pass --without-pip to request the old behaviour)
- Issue #19390: Argument Clinic no longer accepts malformed Python
and C ids.
What's New in Python 3.4.0 Alpha 4?
===================================
Release date: 2013-10-20
Core and Builtins
-----------------
- Issue #19301: Give classes and functions that are explicitly marked global a
global qualname.
- Issue #19279: UTF-7 decoder no longer produces illegal strings.
- Issue #16612: Add "Argument Clinic", a compile-time preprocessor for
C files to generate argument parsing code. (See PEP 436.)
- Issue #18810: Shift stat calls in importlib.machinery.FileFinder such that
the code is optimistic that if something exists in a directory named exactly
like the possible package being searched for that it's in actuality a
directory.
- Issue #18416: importlib.machinery.PathFinder now treats '' as the cwd and
importlib.machinery.FileFinder no longer special-cases '' to '.'. This leads
to modules imported from cwd to now possess an absolute file path for
__file__ (this does not affect modules specified by path on the CLI but it
does affect -m/runpy). It also allows FileFinder to be more consistent by not
having an edge case.
- Issue #4555: All exported C symbols are now prefixed with either
"Py" or "_Py".
- Issue #19219: Speed up marshal.loads(), and make pyc files slightly
(5% to 10%) smaller.
- Issue #19221: Upgrade Unicode database to version 6.3.0.
- Issue #16742: The result of the C callback PyOS_ReadlineFunctionPointer must
now be a string allocated by PyMem_RawMalloc() or PyMem_RawRealloc() (or NULL
if an error occurred), instead of a string allocated by PyMem_Malloc() or
PyMem_Realloc().
- Issue #19199: Remove ``PyThreadState.tick_counter`` field
- Fix macro expansion of _PyErr_OCCURRED(), and make sure to use it in at
least one place so as to avoid regressions.
- Issue #19087: Improve bytearray allocation in order to allow cheap popping
of data at the front (slice deletion).
- Issue #19014: memoryview.cast() is now allowed on zero-length views.
- Issue #18690: memoryview is now automatically registered with
collections.abc.Sequence
- Issue #19078: memoryview now correctly supports the reversed builtin
(Patch by Claudiu Popa)
Library
-------
- Issue #17457: unittest test discovery now works with namespace packages.
Patch by Claudiu Popa.
- Issue #18235: Fix the sysconfig variables LDSHARED and BLDSHARED under AIX.
Patch by David Edelsohn.
- Issue #18606: Add the new "statistics" module (PEP 450). Contributed
by Steven D'Aprano.
- Issue #12866: The audioop module now supports 24-bit samples.
- Issue #19254: Provide an optimized Python implementation of pbkdf2_hmac.
- Issues #19201, Issue #19222, Issue #19223: Add "x" mode (exclusive creation)
in opening file to bz2, gzip and lzma modules. Patches by Tim Heaney and
Vajrasky Kok.
- Fix a reference count leak in _sre.
- Issue #19262: Initial check in of the 'asyncio' package (a.k.a. Tulip,
a.k.a. PEP 3156). There are no docs yet, and the PEP is slightly
out of date with the code. This module will have *provisional* status
in Python 3.4.
- Issue #19276: Fixed the wave module on 64-bit big-endian platforms.
- Issue #19266: Rename the new-in-3.4 ``contextlib.ignore`` context manager
to ``contextlib.suppress`` in order to be more consistent with existing
descriptions of that operation elsewhere in the language and standard
library documentation (Patch by Zero Piraeus).
- Issue #18891: Completed the new email package (provisional) API additions
by adding new classes EmailMessage, MIMEPart, and ContentManager.
- Issue #18281: Unused stat constants removed from `tarfile`.
- Issue #18999: Multiprocessing now supports 'contexts' with the same API
as the module, but bound to specified start methods.
- Issue #18468: The re.split, re.findall, and re.sub functions and the group()
and groups() methods of match object now always return a string or a bytes
object.
- Issue #18725: The textwrap module now supports truncating multiline text.
- Issue #18776: atexit callbacks now display their full traceback when they
raise an exception.
- Issue #17827: Add the missing documentation for ``codecs.encode`` and
``codecs.decode``.
- Issue #19218: Rename collections.abc to _collections_abc in order to
speed up interpreter start.
- Issue #18582: Add 'pbkdf2_hmac' to the hashlib module. It implements PKCS#5
password-based key derivation functions with HMAC as pseudorandom function.
- Issue #19131: The aifc module now correctly reads and writes sampwidth of
compressed streams.
- Issue #19209: Remove import of copyreg from the os module to speed up
interpreter startup. stat_result and statvfs_result are now hard-coded to
reside in the os module.
- Issue #19205: Don't import the 're' module in site and sysconfig module to
speed up interpreter start.
- Issue #9548: Add a minimal "_bootlocale" module that is imported by the
_io module instead of the full locale module.
- Issue #18764: Remove the 'print' alias for the PDB 'p' command so that it no
longer shadows the print function.
- Issue #19158: A rare race in BoundedSemaphore could allow .release() too
often.
- Issue #15805: Add contextlib.redirect_stdout().
- Issue #18716: Deprecate the formatter module.
- Issue #10712: 2to3 has a new "asserts" fixer that replaces deprecated names
of unittest methods (e.g. failUnlessEqual -> assertEqual).
- Issue #18037: 2to3 now escapes '\u' and '\U' in native strings.
- Issue #17839: base64.decodebytes and base64.encodebytes now accept any
object that exports a 1 dimensional array of bytes (this means the same
is now also true for base64_codec)
- Issue #19132: The pprint module now supports compact mode.
- Issue #19137: The pprint module now correctly formats instances of set and
frozenset subclasses.
- Issue #10042: functools.total_ordering now correctly handles
NotImplemented being returned by the underlying comparison function (Patch
by Katie Miller)
- Issue #19092: contextlib.ExitStack now correctly reraises exceptions
from the __exit__ callbacks of inner context managers (Patch by Hrvoje
Nikšić)
- Issue #12641: Avoid passing "-mno-cygwin" to the mingw32 compiler, except
when necessary. Patch by Oscar Benjamin.
- Issue #5845: In site.py, only load readline history from ~/.python_history
if no history has been read already. This avoids double writes to the
history file at shutdown.
- Properly initialize all fields of a SSL object after allocation.
- Issue #19095: SSLSocket.getpeercert() now raises ValueError when the
SSL handshake hasn't been done.
- Issue #4366: Fix building extensions on all platforms when --enable-shared
is used.
- Issue #19030: Fixed `inspect.getmembers` and `inspect.classify_class_attrs`
to attempt activating descriptors before falling back to a __dict__ search
for faulty descriptors. `inspect.classify_class_attrs` no longer returns
Attributes whose home class is None.
C API
-----
- Issue #1772673: The type of `char*` arguments now changed to `const char*`.
- Issue #16129: Added a `Py_SetStandardStreamEncoding` pre-initialization API
to allow embedding applications like Blender to force a particular
encoding and error handler for the standard IO streams (initial patch by
Bastien Montagne)
Tests
-----
- Issue #19275: Fix test_site on AMD64 Snow Leopard
- Issue #14407: Fix unittest test discovery in test_concurrent_futures.
- Issue #18919: Unified and extended tests for audio modules: aifc, sunau and
wave.
- Issue #18714: Added tests for ``pdb.find_function()``.
Documentation
-------------
- Issue #18758: Fixed and improved cross-references.
- Issue #18972: Modernize email examples and use the argparse module in them.
Build
-----
- Issue #19130: Correct PCbuild/readme.txt, Python 3.3 and 3.4 require VS 2010.
- Issue #15663: Update OS X 10.6+ installer to use Tcl/Tk 8.5.15.
- Issue #14499: Fix several problems with OS X universal build support:
1. ppc arch detection for extension module builds broke with Xcode 5
2. ppc arch detection in configure did not work on OS X 10.4
3. -sysroot and -arch flags were unnecessarily duplicated
4. there was no obvious way to configure an intel-32 only build.
- Issue #19019: Change the OS X installer build script to use CFLAGS instead
of OPT for special build options. By setting OPT, some compiler-specific
options like -fwrapv were overridden and thus not used, which could result
in broken interpreters when building with clang.
What's New in Python 3.4.0 Alpha 3?
===================================
Release date: 2013-09-29
Core and Builtins
-----------------
- Issue #18818: The "encodingname" part of PYTHONIOENCODING is now optional.
- Issue #19098: Prevent overflow in the compiler when the recursion limit is set
absurdly high.
Library
-------
- Issue #18929: `inspect.classify_class_attrs()` now correctly finds class
attributes returned by `dir()` that are located in the metaclass.
- Issue #18950: Fix miscellaneous bugs in the sunau module.
Au_read.readframes() now updates current file position and reads correct
number of frames from multichannel stream. Au_write.writeframesraw() now
correctly updates current file position. Au_read.getnframes() now returns an
integer (as in Python 2). Au_read and Au_write now correctly works with file
object if start file position is not a zero.
- Issue #18594: The fast path for collections.Counter() was never taken
due to an over-restrictive type check.
- Issue #19053: ZipExtFile.read1() with non-zero argument no more returns empty
bytes until end of data.
- logging: added support for Unix domain sockets to SocketHandler and
DatagramHandler.
- Issue #18996: TestCase.assertEqual() now more cleverly shorten differing
strings in error report.
- Issue #19034: repr() for tkinter.Tcl_Obj now exposes string reperesentation.
- Issue #18978: ``urllib.request.Request`` now allows the method to be
indicated on the class and no longer sets it to None in ``__init__``.
- Issue #18626: the inspect module now offers a basic command line
introspection interface (Initial patch by Claudiu Popa)
- Issue #3015: Fixed tkinter with wantobject=False. Any Tcl command call
returned empty string.
- Issue #19037: The mailbox module now makes all changes to maildir files
before moving them into place, to avoid race conditions with other programs
that may be accessing the maildir directory.
- Issue #14984: On POSIX systems, when netrc is called without a filename
argument (and therefore is reading the user's $HOME/.netrc file), it now
enforces the same security rules as typical ftp clients: the .netrc file must
be owned by the user that owns the process and must not be readable by any
other user.
- Issue #18873: The tokenize module now detects Python source code encoding
only in comment lines.
- Issue #17764: Enable http.server to bind to a user specified network
interface. Patch contributed by Malte Swart.
- Issue #18937: Add an assertLogs() context manager to unittest.TestCase
to ensure that a block of code emits a message using the logging module.
- Issue #17324: Fix http.server's request handling case on trailing '/'. Patch
contributed by Vajrasky Kok.
- Issue #19018: The heapq.merge() function no longer suppresses IndexError
in the underlying iterables.
- Issue #18784: The uuid module no longer attempts to load libc via ctypes.CDLL
if all the necessary functions have already been found in libuuid. Patch by
Evgeny Sologubov.
- The :envvar:`PYTHONFAULTHANDLER` environment variable now only enables the
faulthandler module if the variable is non-empty. Same behaviour than other
variables like :envvar:`PYTHONDONTWRITEBYTECODE`.
- Issue #1565525: New function ``traceback.clear_frames`` will clear
the local variables of all the stack frames referenced by a traceback
object.
Tests
-----
- Issue #18952: Fix regression in support data downloads introduced when
test.support was converted to a package. Regression noticed by Zachary
Ware.
IDLE
----
- Issue #18873: IDLE now detects Python source code encoding only in comment
lines.
- Issue #18988: The "Tab" key now works when a word is already autocompleted.
Documentation
-------------
- Issue #17003: Unified the size argument names in the io module with common
practice.
Build
-----
- Issue #18596: Support the use of address sanity checking in recent versions
of clang and GCC by appropriately marking known false alarms in the small
object allocator. Patch contributed by Dhiru Kholia.
Tools/Demos
-----------
- Issue #18873: 2to3 and the findnocoding.py script now detect Python source
code encoding only in comment lines.
What's New in Python 3.4.0 Alpha 2?
===================================
Release date: 2013-09-09
Core and Builtins
-----------------
- Issue #18942: sys._debugmallocstats() output was damaged on Windows.
- Issue #18571: Implementation of the PEP 446: file descriptors and file
handles are now created non-inheritable; add functions
os.get/set_inheritable(), os.get/set_handle_inheritable() and
socket.socket.get/set_inheritable().
- Issue #11619: The parser and the import machinery do not encode Unicode
filenames anymore on Windows.
- Issue #18808: Non-daemon threads are now automatically joined when
a sub-interpreter is shutdown (it would previously dump a fatal error).
- Remove support for compiling on systems without getcwd().
- Issue #18774: Remove last bits of GNU PTH thread code and thread_pth.h.
- Issue #18771: Add optimization to set object lookups to reduce the cost
of hash collisions. The core idea is to inspect a second key/hash pair
for each cache line retrieved.
- Issue #16105: When a signal handler fails to write to the file descriptor
registered with ``signal.set_wakeup_fd()``, report an exception instead
of ignoring the error.
- Issue #18722: Remove uses of the "register" keyword in C code.
- Issue #18667: Add missing "HAVE_FCHOWNAT" symbol to posix._have_functions.
- Issue #16499: Add command line option for isolated mode.
- Issue #15301: Parsing fd, uid, and gid parameters for builtins
in Modules/posixmodule.c is now far more robust.
- Issue #18368: PyOS_StdioReadline() no longer leaks memory when realloc()
fail.
- Issue #17934: Add a clear() method to frame objects, to help clean up
expensive details (local variables) and break reference cycles.
- Issue #18780: %-formatting codes %d, %i, and %u now treat int-subclasses
as int (displays value of int-subclass instead of str(int-subclass) ).
Library
-------
- Issue #18808: Thread.join() now waits for the underlying thread state to
be destroyed before returning. This prevents unpredictable aborts in
Py_EndInterpreter() when some non-daemon threads are still running.
- Issue #18458: Prevent crashes with newer versions of libedit. Its readline
emulation has changed from 0-based indexing to 1-based like gnu readline.
- Issue #18852: Handle case of ``readline.__doc__`` being ``None`` in the new
readline activation code in ``site.py``.
- Issue #18672: Fixed format specifiers for Py_ssize_t in debugging output in
the _sre module.
- Issue #18830: inspect.getclasstree() no longer produces duplicate entries even
when input list contains duplicates.
- Issue #18878: sunau.open now supports the context management protocol. Based on
patches by Claudiu Popa and R. David Murray.
- Issue #18909: Fix _tkinter.tkapp.interpaddr() on Windows 64-bit, don't cast
64-bit pointer to long (32 bits).
- Issue #18876: The FileIO.mode attribute now better reflects the actual mode
under which the file was opened. Patch by Erik Bray.
- Issue #16853: Add new selectors module.
- Issue #18882: Add threading.main_thread() function.
- Issue #18901: The sunau getparams method now returns a namedtuple rather than
a plain tuple. Patch by Claudiu Popa.
- Issue #17487: The result of the wave getparams method now is pickleable again.
Patch by Claudiu Popa.
- Issue #18756: os.urandom() now uses a lazily-opened persistent file
descriptor, so as to avoid using many file descriptors when run in
parallel from multiple threads.
- Issue #18418: After fork(), reinit all threads states, not only active ones.
Patch by A. Jesse Jiryu Davis.
- Issue #17974: Switch unittest from using getopt to using argparse.
- Issue #11798: TestSuite now drops references to own tests after execution.
- Issue #16611: http.cookie now correctly parses the 'secure' and 'httponly'
cookie flags.
- Issue #11973: Fix a problem in kevent. The flags and fflags fields are now
properly handled as unsigned.
- Issue #18807: ``pyvenv`` now takes a --copies argument allowing copies
instead of symlinks even where symlinks are available and the default.
- Issue #18538: ``python -m dis`` now uses argparse for argument processing.
Patch by Michele Orrù.
- Issue #18394: Close cgi.FieldStorage's optional file.
- Issue #17702: On error, os.environb now suppresses the exception context
when raising a new KeyError with the original key.
- Issue #16809: Fixed some tkinter incompabilities with Tcl/Tk 8.6.
- Issue #16809: Tkinter's splitlist() and split() methods now accept Tcl_Obj
argument.
- Issue #18324: set_payload now correctly handles binary input. This also
supersedes the previous fixes for #14360, #1717, and #16564.
- Issue #18794: Add a fileno() method and a closed attribute to select.devpoll
objects.
- Issue #17119: Fixed integer overflows when processing large strings and tuples
in the tkinter module.
- Issue #18747: Re-seed OpenSSL's pseudo-random number generator after fork.
A pthread_atfork() parent handler is used to seed the PRNG with pid, time
and some stack data.
- Issue #8865: Concurrent invocation of select.poll.poll() now raises a
RuntimeError exception. Patch by Christian Schubert.
- Issue #18777: The ssl module now uses the new CRYPTO_THREADID API of
OpenSSL 1.0.0+ instead of the deprecated CRYPTO id callback function.
- Issue #18768: Correct doc string of RAND_edg(). Patch by Vajrasky Kok.
- Issue #18178: Fix ctypes on BSD. dlmalloc.c was compiled twice which broke
malloc weak symbols.
- Issue #18709: Fix CVE-2013-4238. The SSL module now handles NULL bytes
inside subjectAltName correctly. Formerly the module has used OpenSSL's
GENERAL_NAME_print() function to get the string represention of ASN.1
strings for ``rfc822Name`` (email), ``dNSName`` (DNS) and
``uniformResourceIdentifier`` (URI).
- Issue #18701: Remove support of old CPython versions (<3.0) from C code.
- Issue #18756: Improve error reporting in os.urandom() when the failure
is due to something else than /dev/urandom not existing (for example,
exhausting the file descriptor limit).
- Issue #18673: Add O_TMPFILE to os module. O_TMPFILE requires Linux kernel
3.11 or newer. It's only defined on system with 3.11 uapi headers, too.
- Issue #18532: Change the builtin hash algorithms' names to lower case names
as promised by hashlib's documentation.
- Issue #8713: add new spwan and forkserver start methods, and new functions
get_all_start_methods, get_start_method, and set_start_method, to
multiprocessing.
- Issue #18405: Improve the entropy of crypt.mksalt().
- Issue #12015: The tempfile module now uses a suffix of 8 random characters
instead of 6, to reduce the risk of filename collision. The entropy was
reduced when uppercase letters were removed from the charset used to generate
random characters.
- Issue #18585: Add :func:`textwrap.shorten` to collapse and truncate a
piece of text to a given length.
- Issue #18598: Tweak exception message for importlib.import_module() to
include the module name when a key argument is missing.
- Issue #19151: Fix docstring and use of _get_supported_file_loaders() to
reflect 2-tuples.
- Issue #19152: Add ExtensionFileLoader.get_filename().
- Issue #18676: Change 'positive' to 'non-negative' in queue.py put and get
docstrings and ValueError messages. Patch by Zhongyue Luo
- Fix refcounting issue with extension types in tkinter.
- Issue #8112: xlmrpc.server's DocXMLRPCServer server no longer raises an error
if methods have annotations; it now correctly displays the annotations.
- Issue #18600: Added policy argument to email.message.Message.as_string,
and as_bytes and __bytes__ methods to Message.
- Issue #18671: Output more information when logging exceptions occur.
- Issue #18621: Prevent the site module's patched builtins from keeping
too many references alive for too long.
- Issue #4885: Add weakref support to mmap objects. Patch by Valerie Lambert.
- Issue #8860: Fixed rounding in timedelta constructor.
- Issue #18849: Fixed a Windows-specific tempfile bug where collision with an
existing directory caused mkstemp and related APIs to fail instead of
retrying. Report and fix by Vlad Shcherbina.
- Issue #18920: argparse's default destination for the version action (-v,
--version) has also been changed to stdout, to match the Python executable.
Tests
-----
- Issue #18623: Factor out the _SuppressCoreFiles context manager into
test.support. Patch by Valerie Lambert.
- Issue #12037: Fix test_email for desktop Windows.
- Issue #15507: test_subprocess's test_send_signal could fail if the test
runner were run in an environment where the process inherited an ignore
setting for SIGINT. Restore the SIGINT handler to the desired
KeyboardInterrupt raising one during that test.
- Issue #16799: Switched from getopt to argparse style in regrtest's argument
parsing. Added more tests for regrtest's argument parsing.
- Issue #18792: Use "127.0.0.1" or "::1" instead of "localhost" as much as
possible, since "localhost" goes through a DNS lookup under recent Windows
versions.
IDLE
----
- Issue #18489: Add tests for SearchEngine. Original patch by Phil Webster.
Documentation
-------------
- Issue #18743: Fix references to non-existant "StringIO" module.
- Issue #18783: Removed existing mentions of Python long type in docstrings,
error messages and comments.
Build
-----
- Issue #1584: Provide configure options to override default search paths for
Tcl and Tk when building _tkinter.
- Issue #15663: Tcl/Tk 8.5.14 is now included with the OS X 10.6+ 64-/32-bit
installer. It is no longer necessary to install a third-party version of
Tcl/Tk 8.5 to work around the problems in the Apple-supplied Tcl/Tk 8.5
shipped in OS X 10.6 and later releases.
Tools/Demos
-----------
- Issue #18922: Now The Lib/smtpd.py and Tools/i18n/msgfmt.py scripts write
their version strings to stdout, and not to sderr.
What's New in Python 3.4.0 Alpha 1?
===================================
Release date: 2013-08-03
Core and Builtins
-----------------
- Issue #16741: Fix an error reporting in int().
- Issue #17899: Fix rare file descriptor leak in os.listdir().
- Issue #10241: Clear extension module dict copies at interpreter shutdown.
Patch by Neil Schemenauer, minimally modified.
- Issue #9035: ismount now recognises volumes mounted below a drive root
on Windows. Original patch by Atsuo Ishimoto.
- Issue #18214: Improve finalization of Python modules to avoid setting
their globals to None, in most cases.
- Issue #18112: PEP 442 implementation (safe object finalization).
- Issue #18552: Check return value of PyArena_AddPyObject() in
obj2ast_object().
- Issue #18560: Fix potential NULL pointer dereference in sum().
- Issue #18520: Add a new PyStructSequence_InitType2() function, same than
PyStructSequence_InitType() except that it has a return value (0 on success,
-1 on error).
- Issue #15905: Fix theoretical buffer overflow in handling of sys.argv[0],
prefix and exec_prefix if the operation system does not obey MAXPATHLEN.
- Issue #18408: Fix many various bugs in code handling errors, especially
on memory allocation failure (MemoryError).
- Issue #18344: Fix potential ref-leaks in _bufferedreader_read_all().
- Issue #18342: Use the repr of a module name when an import fails when using
``from ... import ...``.
- Issue #17872: Fix a segfault in marshal.load() when input stream returns
more bytes than requested.
- Issue #18338: `python --version` now prints version string to stdout, and
not to stderr. Patch by Berker Peksag and Michael Dickens.
- Issue #18426: Fix NULL pointer dereference in C extension import when
PyModule_GetDef() returns an error.
- Issue #17206: On Windows, increase the stack size from 2 MB to 4.2 MB to fix
a stack overflow in the marshal module (fix a crash in test_marshal).
Patch written by Jeremy Kloth.
- Issue #3329: Implement the PEP 445: Add new APIs to customize Python memory
allocators.
- Issue #18328: Reorder ops in PyThreadState_Delete*() functions. Now the
tstate is first removed from TLS and then deallocated.
- Issue #13483: Use VirtualAlloc in obmalloc on Windows.
- Issue #18184: PyUnicode_FromFormat() and PyUnicode_FromFormatV() now raise
OverflowError when an argument of %c format is out of range.
- Issue #18111: The min() and max() functions now support a default argument
to be returned instead of raising a ValueError on an empty sequence.
(Contributed by Julian Berman.)
- Issue #18137: Detect integer overflow on precision in float.__format__()
and complex.__format__().
- Issue #18183: Fix various unicode operations on strings with large unicode
codepoints.
- Issue #18180: Fix ref leak in _PyImport_GetDynLoadWindows().
- Issue #18038: SyntaxError raised during compilation sources with illegal
encoding now always contains an encoding name.
- Issue #17931: Resolve confusion on Windows between pids and process
handles.
- Tweak the exception message when the magic number or size value in a bytecode
file is truncated.
- Issue #17932: Fix an integer overflow issue on Windows 64-bit in iterators:
change the C type of seqiterobject.it_index from long to Py_ssize_t.
- Issue #18065: Don't set __path__ to the package name for frozen packages.
- Issue #18088: When reloading a module, unconditionally reset all relevant
attributes on the module (e.g. __name__, __loader__, __package__, __file__,
__cached__).
- Issue #17937: Try harder to collect cyclic garbage at shutdown.
- Issue #12370: Prevent class bodies from interfering with the __class__
closure.
- Issue #17644: Fix a crash in str.format when curly braces are used in square
brackets.
- Issue #17237: Fix crash in the ASCII decoder on m68k.
- Issue #17927: Frame objects kept arguments alive if they had been
copied into a cell, even if the cell was cleared.
- Issue #1545463: At shutdown, defer finalization of codec modules so
that stderr remains usable.
- Issue #7330: Implement width and precision (ex: "%5.3s") for the format
string of PyUnicode_FromFormat() function, original patch written by Ysj Ray.
- Issue #1545463: Global variables caught in reference cycles are now
garbage-collected at shutdown.
- Issue #17094: Clear stale thread states after fork(). Note that this
is a potentially disruptive change since it may release some system
resources which would otherwise remain perpetually alive (e.g. database
connections kept in thread-local storage).
- Issue #17408: Avoid using an obsolete instance of the copyreg module when
the interpreter is shutdown and then started again.
- Issue #5845: Enable tab-completion in the interactive interpreter by
default, thanks to a new sys.__interactivehook__.
- Issue #17115,17116: Module initialization now includes setting __package__ and
__loader__ attributes to None.
- Issue #17853: Ensure locals of a class that shadow free variables always win
over the closures.
- Issue #17863: In the interactive console, don't loop forever if the encoding
can't be fetched from stdin.
- Issue #17867: Raise an ImportError if __import__ is not found in __builtins__.
- Issue #18698: Ensure importlib.reload() returns the module out of sys.modules.
- Issue #17857: Prevent build failures with pre-3.5.0 versions of sqlite3,
such as was shipped with Centos 5 and Mac OS X 10.4.
- Issue #17413: sys.settrace callbacks were being passed a string instead of an
exception instance for the 'value' element of the arg tuple if the exception
originated from C code; now an exception instance is always provided.
- Issue #17782: Fix undefined behaviour on platforms where
``struct timespec``'s "tv_nsec" member is not a C long.
- Issue #17722: When looking up __round__, resolve descriptors.
- Issue #16061: Speed up str.replace() for replacing 1-character strings.
- Issue #17715: Fix segmentation fault from raising an exception in a __trunc__
method.
- Issue #17643: Add __callback__ attribute to weakref.ref.
- Issue #16447: Fixed potential segmentation fault when setting __name__ on a
class.
- Issue #17669: Fix crash involving finalization of generators using yield from.
- Issue #14439: Python now prints the traceback on runpy failure at startup.
- Issue #17469: Fix _Py_GetAllocatedBlocks() and sys.getallocatedblocks()
when running on valgrind.
- Issue #17619: Make input() check for Ctrl-C correctly on Windows.
- Issue #17357: Add missing verbosity messages for -v/-vv that were lost during
the importlib transition.
- Issue #17610: Don't rely on non-standard behavior of the C qsort() function.
- Issue #17323: The "[X refs, Y blocks]" printed by debug builds has been
disabled by default. It can be re-enabled with the `-X showrefcount` option.
- Issue #17328: Fix possible refleak in dict.setdefault.
- Issue #17275: Corrected class name in init error messages of the C version of
BufferedWriter and BufferedRandom.
- Issue #7963: Fixed misleading error message that issued when object is
called without arguments.
- Issue #8745: Small speed up zipimport on Windows. Patch by Catalin Iacob.
- Issue #5308: Raise ValueError when marshalling too large object (a sequence
with size >= 2**31), instead of producing illegal marshal data.
- Issue #12983: Bytes literals with invalid \x escape now raise a SyntaxError
and a full traceback including line number.
- Issue #16967: In function definition, evaluate positional defaults before
keyword-only defaults.
- Issue #17173: Remove uses of locale-dependent C functions (isalpha() etc.)
in the interpreter.
- Issue #17137: When an Unicode string is resized, the internal wide character
string (wstr) format is now cleared.
- Issue #17043: The unicode-internal decoder no longer read past the end of
input buffer.
- Issue #17098: All modules now have __loader__ set even if they pre-exist the
bootstrapping of importlib.
- Issue #16979: Fix error handling bugs in the unicode-escape-decode decoder.
- Issue #16772: The base argument to the int constructor no longer accepts
floats, or other non-integer objects with an __int__ method. Objects
with an __index__ method are now accepted.
- Issue #10156: In the interpreter's initialization phase, unicode globals
are now initialized dynamically as needed.
- Issue #16980: Fix processing of escaped non-ascii bytes in the
unicode-escape-decode decoder.
- Issue #16975: Fix error handling bug in the escape-decode bytes decoder.
- Issue #14850: Now a charmap decoder treats U+FFFE as "undefined mapping"
in any mapping, not only in a string.
- Issue #16613: Add *m* argument to ``collections.Chainmap.new_child`` to
allow the new child map to be specified explicitly.
- Issue #16730: importlib.machinery.FileFinder now no longers raises an
exception when trying to populate its cache and it finds out the directory is
unreadable or has turned into a file. Reported and diagnosed by
David Pritchard.
- Issue #16906: Fix a logic error that prevented most static strings from being
cleared.
- Issue #11461: Fix the incremental UTF-16 decoder. Original patch by
Amaury Forgeot d'Arc.
- Issue #16856: Fix a segmentation fault from calling repr() on a dict with
a key whose repr raise an exception.
- Issue #16367: Fix FileIO.readall() on Windows for files larger than 2 GB.
- Issue #16761: Calling int() with base argument only now raises TypeError.
- Issue #16759: Support the full DWORD (unsigned long) range in Reg2Py
when retrieving a REG_DWORD value. This corrects functions like
winreg.QueryValueEx that may have been returning truncated values.
- Issue #14420: Support the full DWORD (unsigned long) range in Py2Reg
when passed a REG_DWORD value. Fixes OverflowError in winreg.SetValueEx.
- Issue #11939: Set the st_dev attribute of stat_result to allow Windows to
take advantage of the os.path.samefile/sameopenfile/samestat implementations
used by other platforms.
- Issue #16772: The int() constructor's second argument (base) no longer
accepts non integer values. Consistent with the behavior in Python 2.
- Issue #14470: Remove w9xpopen support per PEP 11.
- Issue #9856: Replace deprecation warning with raising TypeError
in object.__format__. Patch by Florent Xicluna.
- Issue #16597: In buffered and text IO, call close() on the underlying stream
if invoking flush() fails.
- Issue #16722: In the bytes() constructor, try to call __bytes__ on the
argument before __index__.
- Issue #16421: loading multiple modules from one shared object is now
handled correctly (previously, the first module loaded from that file
was silently returned). Patch by Václav Šmilauer.
- Issue #16602: When a weakref's target was part of a long deallocation
chain, the object could remain reachable through its weakref even though
its refcount had dropped to zero.
- Issue #16495: Remove extraneous NULL encoding check from bytes_decode().
- Issue #16619: Create NameConstant AST class to represent None, True, and False
literals. As a result, these constants are never loaded at runtime from
builtins.
- Issue #16455: On FreeBSD and Solaris, if the locale is C, the
ASCII/surrogateescape codec is now used (instead of the locale encoding) to
decode the command line arguments. This change fixes inconsistencies with
os.fsencode() and os.fsdecode(), because these operating systems announce an
ASCII locale encoding, but actually use the ISO-8859-1 encoding in practice.
- Issue #16562: Optimize dict equality testing. Patch by Serhiy Storchaka.
- Issue #16588: Silence unused-but-set warnings in Python/thread_pthread
- Issue #16592: stringlib_bytes_join doesn't raise MemoryError on allocation
failure.
- Issue #16546: Fix: ast.YieldFrom argument is now mandatory.
- Issue #16514: Fix regression causing a traceback when sys.path[0] is None
(actually, any non-string or non-bytes type).
- Issue #16306: Fix multiple error messages when unknown command line
parameters where passed to the interpreter. Patch by Hieu Nguyen.
- Issue #16215: Fix potential double memory free in str.replace(). Patch
by Serhiy Storchaka.
- Issue #16290: A float return value from the __complex__ special method is no
longer accepted in the complex() constructor.
- Issue #16416: On Mac OS X, operating system data are now always
encoded/decoded to/from UTF-8/surrogateescape, instead of the locale encoding
(which may be ASCII if no locale environment variable is set), to avoid
inconsistencies with os.fsencode() and os.fsdecode() functions which are
already using UTF-8/surrogateescape.
- Issue #16453: Fix equality testing of dead weakref objects.
- Issue #9535: Fix pending signals that have been received but not yet
handled by Python to not persist after os.fork() in the child process.
- Issue #14794: Fix slice.indices to return correct results for huge values,
rather than raising OverflowError.
- Issue #15001: fix segfault on "del sys.modules['__main__']". Patch by Victor
Stinner.
- Issue #8271: the utf-8 decoder now outputs the correct number of U+FFFD
characters when used with the 'replace' error handler on invalid utf-8
sequences. Patch by Serhiy Storchaka, tests by Ezio Melotti.
- Issue #5765: Apply a hard recursion limit in the compiler instead of
blowing the stack and segfaulting. Initial patch by Andrea Griffini.
- Issue #16402: When slicing a range, fix shadowing of exceptions from
__index__.
- Issue #16336: fix input checking in the surrogatepass error handler.
Patch by Serhiy Storchaka.
- Issue #8401: assigning an int to a bytearray slice (e.g. b[3:4] = 5) now
raises an error.
- Issue #7317: Display full tracebacks when an error occurs asynchronously.
Patch by Alon Horev with update by Alexey Kachayev.
- Issue #16309: Make PYTHONPATH="" behavior the same as if PYTHONPATH
not set at all.
- Issue #10189: Improve the error reporting of SyntaxErrors related to global
and nonlocal statements.
- Fix segfaults on setting __qualname__ on builtin types and attempting to
delete it on any type.
- Issue #14625: Rewrite the UTF-32 decoder. It is now 3x to 4x faster. Patch
written by Serhiy Storchaka.
- Issue #16345: Fix an infinite loop when ``fromkeys`` on a dict subclass
received a nonempty dict from the constructor.
- Issue #16271: Fix strange bugs that resulted from __qualname__ appearing in a
class's __dict__ and on type.
- Issue #12805: Make bytes.join and bytearray.join faster when the separator
is empty. Patch by Serhiy Storchaka.
- Issue #6074: Ensure cached bytecode files can always be updated by the
user that created them, even when the source file is read-only.
- Issue #15958: bytes.join and bytearray.join now accept arbitrary buffer
objects.
- Issue #14783: Improve int() docstring and switch docstrings for str(),
range(), and slice() to use multi-line signatures.
- Issue #16160: Subclass support now works for types.SimpleNamespace.
- Issue #16148: Implement PEP 424, adding operator.length_hint and
PyObject_LengthHint.
- Upgrade Unicode data (UCD) to version 6.2.
- Issue #15379: Fix passing of non-BMP characters as integers for the charmap
decoder (already working as unicode strings). Patch by Serhiy Storchaka.
- Issue #15144: Fix possible integer overflow when handling pointers as integer
values, by using `Py_uintptr_t` instead of `size_t`. Patch by Serhiy
Storchaka.
- Issue #15965: Explicitly cast `AT_FDCWD` as (int). Required on Solaris 10
(which defines `AT_FDCWD` as ``0xffd19553``), harmless on other platforms.
- Issue #15839: Convert SystemErrors in `super()` to RuntimeErrors.
- Issue #15448: Buffered IO now frees the buffer when closed, instead
of when deallocating.
- Issue #15846: Fix SystemError which happened when using `ast.parse()` in an
exception handler on code with syntax errors.
- Issue #15897: zipimport.c doesn't check return value of fseek().
Patch by Felipe Cruz.
- Issue #15801: Make sure mappings passed to '%' formatting are actually
subscriptable.
- Issue #15111: __import__ should propagate ImportError when raised as a
side-effect of a module triggered from using fromlist.
- Issue #15022: Add pickle and comparison support to types.SimpleNamespace.
Library
-------
- Issue #4331: Added functools.partialmethod (Initial patch by Alon Horev)
- Issue #13461: Fix a crash in the TextIOWrapper.tell method on 64-bit
platforms. Patch by Yogesh Chaudhari.
- Issue #18681: Fix a NameError in importlib.reload() (noticed by Weizhao Li).
- Issue #14323: Expanded the number of digits in the coefficients for the
RGB -- YIQ conversions so that they match the FCC NTSC versions.
- Issue #17998: Fix an internal error in regular expression engine.
- Issue #17557: Fix os.getgroups() to work with the modified behavior of
getgroups(2) on OS X 10.8. Original patch by Mateusz Lenik.
- Issue #18608: Avoid keeping a strong reference to the locale module
inside the _io module.
- Issue #18619: Fix atexit leaking callbacks registered from sub-interpreters,
and make it GC-aware.
- Issue #15699: The readline module now uses PEP 3121-style module
initialization, so as to reclaim allocated resources (Python callbacks)
at shutdown. Original patch by Robin Schreiber.
- Issue #17616: wave.open now supports the context management protocol.
- Issue #18599: Fix name attribute of _sha1.sha1() object. It now returns
'SHA1' instead of 'SHA'.
- Issue #13266: Added inspect.unwrap to easily unravel __wrapped__ chains
(initial patch by Daniel Urban and Aaron Iles)
- Issue #18561: Skip name in ctypes' _build_callargs() if name is NULL.
- Issue #18559: Fix NULL pointer dereference error in _pickle module
- Issue #18556: Check the return type of PyUnicode_AsWideChar() in ctype's
U_set().
- Issue #17818: aifc.getparams now returns a namedtuple.
- Issue #18549: Eliminate dead code in socket_ntohl()
- Issue #18530: Remove additional stat call from posixpath.ismount.
Patch by Alex Gaynor.
- Issue #18514: Fix unreachable Py_DECREF() call in PyCData_FromBaseObj()
- Issue #9177: Calling read() or write() now raises ValueError, not
AttributeError, on a closed SSL socket. Patch by Senko Rasic.
- Issue #18513: Fix behaviour of cmath.rect w.r.t. signed zeros on OS X 10.8 +
gcc.
- Issue #18479: Changed venv Activate.ps1 to make deactivate a function, and
removed Deactivate.ps1.
- Issue #18480: Add missing call to PyType_Ready to the _elementtree extension.
- Issue #17778: Fix test discovery for test_multiprocessing. (Patch by
Zachary Ware.)
- Issue #18393: The private module _gestalt and private functions
platform._mac_ver_gestalt, platform._mac_ver_lookup and
platform._bcd2str have been removed. This does not affect the public
interface of the platform module.
- Issue #17482: functools.update_wrapper (and functools.wraps) now set the
__wrapped__ attribute correctly even if the underlying function has a
__wrapped__ attribute set.
- Issue #18431: The new email header parser now decodes RFC2047 encoded words
in structured headers.
- Issue #18432: The sched module's queue method was incorrectly returning
an iterator instead of a list.
- Issue #18044: The new email header parser was mis-parsing encoded words where
an encoded character immediately followed the '?' that follows the CTE
character, resulting in a decoding failure. They are now decoded correctly.
- Issue #18101: Tcl.split() now process strings nested in a tuple as it
do with byte strings.
- Issue #18116: getpass was always getting an error when testing /dev/tty,
and thus was always falling back to stdin, and would then raise an exception
if stdin could not be used (such as /dev/null). It also leaked an open file.
All of these issues are now fixed.
- Issue #17198: Fix a NameError in the dbm module. Patch by Valentina
Mukhamedzhanova.
- Issue #18013: Fix cgi.FieldStorage to parse the W3C sample form.
- Issue #18020: improve html.escape speed by an order of magnitude.
Patch by Matt Bryant.
- Issue #18347: ElementTree's html serializer now preserves the case of
closing tags.
- Issue #17261: Ensure multiprocessing's proxies use proper address.
- Issue #18343: faulthandler.register() now keeps the previous signal handler
when the function is called twice, so faulthandler.unregister() restores
correctly the original signal handler.
- Issue #17097: Make multiprocessing ignore EINTR.
- Issue #18339: Negative ints keys in unpickler.memo dict no longer cause a
segfault inside the _pickle C extension.
- Issue #18240: The HMAC module is no longer restricted to bytes and accepts
any bytes-like object, e.g. memoryview. Original patch by Jonas Borgström.
- Issue #18224: Removed pydoc script from created venv, as it causes problems
on Windows and adds no value over and above python -m pydoc ...
- Issue #18155: The csv module now correctly handles csv files that use
a delimter character that has a special meaning in regexes, instead of
throwing an exception.
- Issue #14360: encode_quopri can now be successfully used as an encoder
when constructing a MIMEApplication object.
- Issue #11390: Add -o and -f command line options to the doctest CLI to
specify doctest options (and convert it to using argparse).
- Issue #18135: ssl.SSLSocket.write() now raises an OverflowError if the input
string in longer than 2 gigabytes, and ssl.SSLContext.load_cert_chain()
raises a ValueError if the password is longer than 2 gigabytes. The ssl
module does not support partial write.
- Issue #11016: Add C implementation of the stat module as _stat.
- Issue #18248: Fix libffi build on AIX.
- Issue #18259: Declare sethostname in socketmodule.c for AIX
- Issue #18147: Add diagnostic functions to ssl.SSLContext(). get_ca_list()
lists all loaded CA certificates and cert_store_stats() returns amount of
loaded X.509 certs, X.509 CA certs and CRLs.
- Issue #18167: cgi.FieldStorage no longer fails to handle multipart/form-data
when \r\n appears at end of 65535 bytes without other newlines.
- Issue #18076: Introduce importlib.util.decode_source().
- Issue #18357: add tests for dictview set difference.
Patch by Fraser Tweedale.
- importlib.abc.SourceLoader.get_source() no longer changes SyntaxError or
UnicodeDecodeError into ImportError.
- Issue #18058, 18057: Make the namespace package loader meet the
importlib.abc.InspectLoader ABC, allowing for namespace packages to work with
runpy.
- Issue #17177: The imp module is pending deprecation.
- subprocess: Prevent a possible double close of parent pipe fds when the
subprocess exec runs into an error. Prevent a regular multi-close of the
/dev/null fd when any of stdin, stdout and stderr was set to DEVNULL.
- Issue #18194: Introduce importlib.util.cache_from_source() and
source_from_cache() while documenting the equivalent functions in imp as
deprecated.
- Issue #17907: Document imp.new_module() as deprecated in favour of
types.ModuleType.
- Issue #18192: Introduce importlib.util.MAGIC_NUMBER and document as deprecated
imp.get_magic().
- Issue #18149: Add filecmp.clear_cache() to manually clear the filecmp cache.
Patch by Mark Levitt
- Issue #18193: Add importlib.reload().
- Issue #18157: Stop using imp.load_module() in pydoc.
- Issue #16102: Make uuid._netbios_getnode() work again on Python 3.
- Issue #17134: Add ssl.enum_cert_store() as interface to Windows' cert store.
- Issue #18143: Implement ssl.get_default_verify_paths() in order to debug
the default locations for cafile and capath.
- Issue #17314: Move multiprocessing.forking over to importlib.
- Issue #11959: SMTPServer and SMTPChannel now take an optional map, use of
which avoids affecting global state.
- Issue #18109: os.uname() now decodes fields from the locale encoding, and
socket.gethostname() now decodes the hostname from the locale encoding,
instead of using the UTF-8 encoding in strict mode.
- Issue #18089: Implement importlib.abc.InspectLoader.load_module.
- Issue #18088: Introduce importlib.abc.Loader.init_module_attrs for setting
module attributes. Leads to the pending deprecation of
importlib.util.module_for_loader.
- Issue #17403: urllib.parse.robotparser normalizes the urls before adding to
ruleline. This helps in handling certain types invalid urls in a conservative
manner. Patch contributed by Mher Movsisyan.
- Issue #18070: Have importlib.util.module_for_loader() set attributes
unconditionally in order to properly support reloading.
- Added importlib.util.module_to_load to return a context manager to provide the
proper module object to load.
- Issue #18025: Fixed a segfault in io.BufferedIOBase.readinto() when raw
stream's read() returns more bytes than requested.
- Issue #18011: As was originally intended, base64.b32decode() now raises a
binascii.Error if there are non-b32-alphabet characters present in the input
string, instead of a TypeError.
- Issue #18072: Implement importlib.abc.InspectLoader.get_code() and
importlib.abc.ExecutionLoader.get_code().
- Issue #8240: Set the SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER flag on SSL
sockets.
- Issue #17269: Workaround for socket.getaddrinfo crash on MacOS X
with port None or "0" and flags AI_NUMERICSERV.
- Issue #16986: ElementTree now correctly works with string input when the
internal XML encoding is not UTF-8 or US-ASCII.
- Issue #17996: socket module now exposes AF_LINK constant on BSD and OSX.
- Issue #17900: Allowed pickling of recursive OrderedDicts. Decreased pickled
size and pickling time.
- Issue #17914: Add os.cpu_count(). Patch by Yogesh Chaudhari, based on an
initial patch by Trent Nelson.
- Issue #17812: Fixed quadratic complexity of base64.b32encode().
Optimize base64.b32encode() and base64.b32decode() (speed up to 3x).
- Issue #17980: Fix possible abuse of ssl.match_hostname() for denial of
service using certificates with many wildcards (CVE-2013-2099).
- Issue #15758: Fix FileIO.readall() so it no longer has O(n**2) complexity.
- Issue #14596: The struct.Struct() objects now use a more compact
implementation.
- Issue #17981: logging's SysLogHandler now closes the socket when it catches
socket OSErrors.
- Issue #17964: Fix os.sysconf(): the return type of the C sysconf() function
is long, not int.
- Fix typos in the multiprocessing module.
- Issue #17754: Make ctypes.util.find_library() independent of the locale.
- Issue #17968: Fix memory leak in os.listxattr().
- Issue #17606: Fixed support of encoded byte strings in the XMLGenerator
characters() and ignorableWhitespace() methods. Original patch by Sebastian
Ortiz Vasquez.
- Issue #17732: Ignore distutils.cfg options pertaining to install paths if a
virtual environment is active.
- Issue #17915: Fix interoperability of xml.sax with file objects returned by
codecs.open().
- Issue #16601: Restarting iteration over tarfile really restarts rather
than continuing from where it left off. Patch by Michael Birtwell.
- Issue #17289: The readline module now plays nicer with external modules
or applications changing the rl_completer_word_break_characters global
variable. Initial patch by Bradley Froehle.
- Issue #12181: select module: Fix struct kevent definition on OpenBSD 64-bit
platforms. Patch by Federico Schwindt.
- Issue #11816: multiple improvements to the dis module: get_instructions
generator, ability to redirect output to a file, Bytecode and Instruction
abstractions. Patch by Nick Coghlan, Ryan Kelly and Thomas Kluyver.
- Issue #13831: Embed stringification of remote traceback in local
traceback raised when pool task raises an exception.
- Issue #15528: Add weakref.finalize to support finalization using
weakref callbacks.
- Issue #14173: Avoid crashing when reading a signal handler during
interpreter shutdown.
- Issue #15902: Fix imp.load_module() accepting None as a file when loading an
extension module.
- Issue #13721: SSLSocket.getpeercert() and SSLSocket.do_handshake() now
raise an OSError with ENOTCONN, instead of an AttributeError, when the
SSLSocket is not connected.
- Issue #14679: add an __all__ (that contains only HTMLParser) to html.parser.
- Issue #17802: Fix an UnboundLocalError in html.parser. Initial tests by
Thomas Barlow.
- Issue #17358: Modules loaded by imp.load_source() and load_compiled() (and by
extention load_module()) now have a better chance of working when reloaded.
- Issue #17804: New function ``struct.iter_unpack`` allows for streaming
struct unpacking.
- Issue #17830: When keyword.py is used to update a keyword file, it now
preserves the line endings of the original file.
- Issue #17272: Making the urllib.request's Request.full_url a descriptor.
Fixes bugs with assignment to full_url. Patch by Demian Brecht.
- Issue #17353: Plistlib emitted empty data tags with deeply nested datastructures
- Issue #11714: Use 'with' statements to assure a Semaphore releases a
condition variable. Original patch by Thomas Rachel.
- Issue #16624: `subprocess.check_output` now accepts an `input` argument,
allowing the subprocess's stdin to be provided as a (byte) string.
Patch by Zack Weinberg.
- Issue #17795: Reverted backwards-incompatible change in SysLogHandler with
Unix domain sockets.
- Issue #16694: Add a pure Python implementation of the operator module.
Patch by Zachary Ware.
- Issue #11182: remove the unused and undocumented pydoc.Scanner class.
Patch by Martin Morrison.
- Issue #17741: Add ElementTree.XMLPullParser, an event-driven parser for
non-blocking applications.
- Issue #17555: Fix ForkAwareThreadLock so that size of after fork
registry does not grow exponentially with generation of process.
- Issue #17707: fix regression in multiprocessing.Queue's get() method where
it did not block for short timeouts.
- Issue #17720: Fix the Python implementation of pickle.Unpickler to correctly
process the APPENDS opcode when it is used on non-list objects.
- Issue #17012: shutil.which() no longer falls back to the PATH environment
variable if an empty path argument is specified. Patch by Serhiy Storchaka.
- Issue #17710: Fix pickle raising a SystemError on bogus input.
- Issue #17341: Include the invalid name in the error messages from re about
invalid group names.
- Issue #17702: os.environ now raises KeyError with the original environment
variable name (str on UNIX), instead of using the encoded name (bytes on
UNIX).
- Issue #16163: Make the importlib based version of pkgutil.iter_importers
work for submodules. Initial patch by Berker Peksag.
- Issue #16804: Fix a bug in the 'site' module that caused running
'python -S -m site' to incorrectly throw an exception.
- Issue #15480: Remove the deprecated and unused TYPE_INT64 code from marshal.
Initial patch by Daniel Riti.
- Issue #2118: SMTPException is now a subclass of OSError.
- Issue #17016: Get rid of possible pointer wraparounds and integer overflows
in the re module. Patch by Nickolai Zeldovich.
- Issue #16658: add missing return to HTTPConnection.send()
Patch by Jeff Knupp.
- Issue #9556: the logging package now allows specifying a time-of-day for a
TimedRotatingFileHandler to rotate.
- Issue #14971: unittest test discovery no longer gets confused when a function
has a different __name__ than its name in the TestCase class dictionary.
- Issue #17487: The wave getparams method now returns a namedtuple rather than
a plain tuple.
- Issue #17675: socket repr() provides local and remote addresses (if any).
Patch by Giampaolo Rodola'
- Issue #17093: Make the ABCs in importlib.abc provide default values or raise
reasonable exceptions for their methods to make them more amenable to super()
calls.
- Issue #17566: Make importlib.abc.Loader.module_repr() optional instead of an
abstractmethod; now it raises NotImplementedError so as to be ignored by default.
- Issue #17678: Remove the use of deprecated method in http/cookiejar.py by
changing the call to get_origin_req_host() to origin_req_host.
- Issue #17666: Fix reading gzip files with an extra field.
- Issue #16475: Support object instancing, recursion and interned strings
in marshal
- Issue #17502: Process DEFAULT values in mock side_effect that returns iterator.
- Issue #16795: On the ast.arguments object, unify vararg with varargannotation
and kwarg and kwargannotation. Change the column offset of ast.Attribute to be
at the attribute name.
- Issue #17434: Properly raise a SyntaxError when a string occurs between future
imports.
- Issue #17117: Import and @importlib.util.set_loader now set __loader__ when
it has a value of None or the attribute doesn't exist.
- Issue #17032: The "global" in the "NameError: global name 'x' is not defined"
error message has been removed. Patch by Ram Rachum.
- Issue #18080: When building a C extension module on OS X, if the compiler
is overriden with the CC environment variable, use the new compiler as
the default for linking if LDSHARED is not also overriden. This restores
Distutils behavior introduced in 3.2.3 and inadvertently dropped in 3.3.0.
- Issue #18113: Fixed a refcount leak in the curses.panel module's
set_userptr() method. Reported by Atsuo Ishimoto.
- Implement PEP 443 "Single-dispatch generic functions".
- Implement PEP 435 "Adding an Enum type to the Python standard library".
- Issue #15596: Faster pickling of unicode strings.
- Issue #17572: Avoid chained exceptions when passing bad directives to
time.strptime(). Initial patch by Claudiu Popa.
- Issue #17435: threading.Timer's __init__ method no longer uses mutable
default values for the args and kwargs parameters.
- Issue #17526: fix an IndexError raised while passing code without filename to
inspect.findsource(). Initial patch by Tyler Doyle.
- Issue #17540: Added style parameter to logging formatter configuration by dict.
- Issue #16692: The ssl module now supports TLS 1.1 and TLS 1.2. Initial
patch by Michele Orrù.
- Issue #17025: multiprocessing: Reduce Queue and SimpleQueue contention.
- Issue #17536: Add to webbrowser's browser list: www-browser, x-www-browser,
iceweasel, iceape.
- Issue #17150: pprint now uses line continuations to wrap long string
literals.
- Issue #17488: Change the subprocess.Popen bufsize parameter default value
from unbuffered (0) to buffering (-1) to match the behavior existing code
expects and match the behavior of the subprocess module in Python 2 to avoid
introducing hard to track down bugs.
- Issue #17521: Corrected non-enabling of logger following two calls to
fileConfig().
- Issue #17508: Corrected logging MemoryHandler configuration in dictConfig()
where the target handler wasn't configured first.
- Issue #17209: curses.window.get_wch() now correctly handles KeyboardInterrupt
(CTRL+c).
- Issue #5713: smtplib now handles 421 (closing connection) error codes when
sending mail by closing the socket and reporting the 421 error code via the
exception appropriate to the command that received the error response.
- Issue #16997: unittest.TestCase now provides a subTest() context manager
to procedurally generate, in an easy way, small test instances.
- Issue #17485: Also delete the Request Content-Length header if the data
attribute is deleted. (Follow on to issue Issue #16464).
- Issue #15927: CVS now correctly parses escaped newlines and carriage
when parsing with quoting turned off.
- Issue #17467: add readline and readlines support to mock_open in
unittest.mock.
- Issue #13248: removed deprecated and undocumented difflib.isbjunk,
isbpopular.
- Issue #17192: Update the ctypes module's libffi to v3.0.13. This
specifically addresses a stack misalignment issue on x86 and issues on
some more recent platforms.
- Issue #8862: Fixed curses cleanup when getkey is interrputed by a signal.
- Issue #17443: imaplib.IMAP4_stream was using the default unbuffered IO
in subprocess, but the imap code assumes buffered IO. In Python2 this
worked by accident. IMAP4_stream now explicitly uses buffered IO.
- Issue #17476: Fixed regression relative to Python2 in undocumented pydoc
'allmethods'; it was missing unbound methods on the class.
- Issue #17474: Remove the deprecated methods of Request class.
- Issue #16709: unittest discover order is no-longer filesystem specific. Patch
by Jeff Ramnani.
- Use the HTTPS PyPI url for upload, overriding any plain HTTP URL in pypirc.
- Issue #5024: sndhdr.whichhdr now returns the frame count for WAV files
rather than -1.
- Issue #17460: Remove the strict argument of HTTPConnection and removing the
DeprecationWarning being issued from 3.2 onwards.
- Issue #16880: Do not assume _imp.load_dynamic() is defined in the imp module.
- Issue #16389: Fixed a performance regression relative to Python 3.1 in the
caching of compiled regular expressions.
- Added missing FeedParser and BytesFeedParser to email.parser.__all__.
- Issue #17431: Fix missing import of BytesFeedParser in email.parser.
- Issue #12921: http.server's send_error takes an explain argument to send more
information in response. Patch contributed by Karl.
- Issue #17414: Add timeit, repeat, and default_timer to timeit.__all__.
- Issue #1285086: Get rid of the refcounting hack and speed up
urllib.parse.unquote() and urllib.parse.unquote_to_bytes().
- Issue #17099: Have importlib.find_loader() raise ValueError when __loader__
is not set, harmonizing with what happens when the attribute is set to None.
- Expose the O_PATH constant in the os module if it is available.
- Issue #17368: Fix an off-by-one error in the Python JSON decoder that caused
a failure while decoding empty object literals when object_pairs_hook was
specified.
- Issue #17385: Fix quadratic behavior in threading.Condition. The FIFO
queue now uses a deque instead of a list.
- Issue #15806: Add contextlib.ignore(). This creates a context manager to
ignore specified exceptions, replacing the "except SomeException: pass" idiom.
- Issue #14645: The email generator classes now produce output using the
specified linesep throughout. Previously if the prolog, epilog, or
body were stored with a different linesep, that linesep was used. This
fix corrects an RFC non-compliance issue with smtplib.send_message.
- Issue #17278: Fix a crash in heapq.heappush() and heapq.heappop() when
the list is being resized concurrently.
- Issue #16962: Use getdents64 instead of the obsolete getdents syscall
in the subprocess module on Linux.
- Issue #16935: unittest now counts the module as skipped if it raises SkipTest,
instead of counting it as an error. Patch by Zachary Ware.
- Issue #17018: Make Process.join() retry if os.waitpid() fails with EINTR.
- Issue #17223: array module: Fix a crasher when converting an array containing
invalid characters (outside range [U+0000; U+10ffff]) to Unicode:
repr(array), str(array) and array.tounicode(). Patch written by Manuel Jacob.
- Issue #17197: profile/cProfile modules refactored so that code of run() and
runctx() utility functions is not duplicated in both modules.
- Issue #14720: sqlite3: Convert datetime microseconds correctly.
Patch by Lowe Thiderman.
- Issue #15132: Allow a list for the defaultTest argument of
unittest.TestProgram. Patch by Jyrki Pulliainen.
- Issue #17225: JSON decoder now counts columns in the first line starting
with 1, as in other lines.
- Issue #6623: Added explicit DeprecationWarning for ftplib.netrc, which has
been deprecated and undocumented for a long time.
- Issue #13700: Fix byte/string handling in imaplib authentication when an
authobject is specified.
- Issue #13153: Tkinter functions now raise TclError instead of ValueError when
a string argument contains non-BMP character.
- Issue #9669: Protect re against infinite loops on zero-width matching in
non-greedy repeat. Patch by Matthew Barnett.
- Issue #13169: The maximal repetition number in a regular expression has been
increased from 65534 to 2147483647 (on 32-bit platform) or 4294967294 (on
64-bit).
- Issue #17143: Fix a missing import in the trace module. Initial patch by
Berker Peksag.
- Issue #15220: email.feedparser's line splitting algorithm is now simpler and
faster.
- Issue #16743: Fix mmap overflow check on 32 bit Windows.
- Issue #16996: webbrowser module now uses shutil.which() to find a
web-browser on the executable search path.
- Issue #16800: tempfile.gettempdir() no longer left temporary files when
the disk is full. Original patch by Amir Szekely.
- Issue #17192: Import libffi-3.0.12.
- Issue #16564: Fixed regression relative to Python2 in the operation of
email.encoders.encode_7or8bit when used with binary data.
- Issue #17052: unittest discovery should use self.testLoader.
- Issue #4591: Uid and gid values larger than 2**31 are supported now.
- Issue #17141: random.vonmisesvariate() no longer hangs for large kappas.
- Issue #17149: Fix random.vonmisesvariate to always return results in
[0, 2*math.pi].
- Issue #1470548: XMLGenerator now works with binary output streams.
- Issue #6975: os.path.realpath() now correctly resolves multiple nested
symlinks on POSIX platforms.
- Issue #13773: sqlite3.connect() gets a new `uri` parameter to pass the
filename as a URI, allowing to pass custom options.
- Issue #16564: Fixed regression relative to Python2 in the operation of
email.encoders.encode_noop when used with binary data.
- Issue #10355: The mode, name, encoding and newlines properties now work on
SpooledTemporaryFile objects even when they have not yet rolled over.
Obsolete method xreadline (which has never worked in Python 3) has been
removed.
- Issue #16686: Fixed a lot of bugs in audioop module. Fixed crashes in
avgpp(), maxpp() and ratecv(). Fixed an integer overflow in add(), bias(),
and ratecv(). reverse(), lin2lin() and ratecv() no more lose precision for
32-bit samples. max() and rms() no more returns a negative result and
various other functions now work correctly with 32-bit sample -0x80000000.
- Issue #17073: Fix some integer overflows in sqlite3 module.
- Issue #16723: httplib.HTTPResponse no longer marked closed when the connection
is automatically closed.
- Issue #15359: Add CAN_BCM protocol support to the socket module. Patch by
Brian Thorne.
- Issue #16948: Fix quoted printable body encoding for non-latin1 character
sets in the email package.
- Issue #16811: Fix folding of headers with no value in the provisional email
policies.
- Issue #17132: Update symbol for "yield from" grammar changes.
- Issue #17076: Make copying of xattrs more tolerant of missing FS support.
Patch by Thomas Wouters.
- Issue #17089: Expat parser now correctly works with string input when the
internal XML encoding is not UTF-8 or US-ASCII. It also now accepts bytes
and strings larger than 2 GiB.
- Issue #6083: Fix multiple segmentation faults occured when PyArg_ParseTuple
parses nested mutating sequence.
- Issue #5289: Fix ctypes.util.find_library on Solaris.
- Issue #17106: Fix a segmentation fault in io.TextIOWrapper when an underlying
stream or a decoder produces data of an unexpected type (i.e. when
io.TextIOWrapper initialized with text stream or use bytes-to-bytes codec).
- Issue #17015: When it has a spec, a Mock object now inspects its signature
when matching calls, so that arguments can be matched positionally or
by name.
- Issue #15633: httplib.HTTPResponse is now mark closed when the server
sends less than the advertised Content-Length.
- Issue #12268: The io module file object write methods no longer abort early
when one of its write system calls is interrupted (EINTR).
- Issue #6972: The zipfile module no longer overwrites files outside of
its destination path when extracting malicious zip files.
- Issue #4844: ZipFile now raises BadZipFile when opens a ZIP file with an
incomplete "End of Central Directory" record. Original patch by Guilherme
Polo and Alan McIntyre.
- Issue #17071: Signature.bind() now works when one of the keyword arguments
is named ``self``.
- Issue #12004: Fix an internal error in PyZipFile when writing an invalid
Python file. Patch by Ben Morgan.
- Have py_compile use importlib as much as possible to avoid code duplication.
Code now raises FileExistsError if the file path to be used for the
byte-compiled file is a symlink or non-regular file as a warning that import
will not keep the file path type if it writes to that path.
- Issue #16972: Have site.addpackage() consider already known paths even when
none are explicitly passed in. Bug report and fix by Kirill.
- Issue #1602133: on Mac OS X a shared library build (``--enable-shared``)
now fills the ``os.environ`` variable correctly.
- Issue #15505: `unittest.installHandler` no longer assumes SIGINT handler is
set to a callable object.
- Issue #13454: Fix a crash when deleting an iterator created by itertools.tee()
if all other iterators were very advanced before.
- Issue #12411: Fix to cgi.parse_multipart to correctly use bytes boundaries
and bytes data. Patch by Jonas Wagner.
- Issue #16957: shutil.which() no longer searches a bare file name in the
current directory on Unix and no longer searches a relative file path with
a directory part in PATH directories. Patch by Thomas Kluyver.
- Issue #1159051: GzipFile now raises EOFError when reading a corrupted file
with truncated header or footer.
- Issue #16993: shutil.which() now preserves the case of the path and extension
on Windows.
- Issue #16992: On Windows in signal.set_wakeup_fd, validate the file
descriptor argument.
- Issue #16422: For compatibility with the Python version, the C version of
decimal now uses strings instead of integers for rounding mode constants.
- Issue #15861: tkinter now correctly works with lists and tuples containing
strings with whitespaces, backslashes or unbalanced braces.
- Issue #9720: zipfile now writes correct local headers for files larger than
4 GiB.
- Issue #16955: Fix the poll() method for multiprocessing's socket
connections on Windows.
- SSLContext.load_dh_params() now properly closes the input file.
- Issue #15031: Refactor some .pyc management code to cut down on code
duplication. Thanks to Ronan Lamy for the report and taking an initial stab
at the problem.
- Issue #16398: Optimize deque.rotate() so that it only moves pointers
and doesn't touch the underlying data with increfs and decrefs.
- Issue #16900: Issue a ResourceWarning when an ssl socket is left unclosed.
- Issue #13899: \A, \Z, and \B now correctly match the A, Z, and B literals
when used inside character classes (e.g. '[\A]'). Patch by Matthew Barnett.
- Issue #15545: Fix regression in sqlite3's iterdump method where it was
failing if the connection used a row factory (such as sqlite3.Row) that
produced unsortable objects. (Regression was introduced by fix for 9750).
- fcntl: add F_DUPFD_CLOEXEC constant, available on Linux 2.6.24+.
- Issue #15972: Fix error messages when os functions expecting a file name or
file descriptor receive the incorrect type.
- Issue #8109: The ssl module now has support for server-side SNI, thanks
to a :meth:`SSLContext.set_servername_callback` method. Patch by Daniel
Black.
- Issue #16860: In tempfile, use O_CLOEXEC when available to set the
close-on-exec flag atomically.
- Issue #16674: random.getrandbits() is now 20-40% faster for small integers.
- Issue #16009: JSON error messages now provide more information.
- Issue #16828: Fix error incorrectly raised by bz2.compress(b'') and
bz2.BZ2Compressor.compress(b''). Initial patch by Martin Packman.
- Issue #16833: In http.client.HTTPConnection, do not concatenate the request
headers and body when the payload exceeds 16 KB, since it can consume more
memory for no benefit. Patch by Benno Leslie.
- Issue #16541: tk_setPalette() now works with keyword arguments.
- Issue #16820: In configparser, `parser.popitem()` no longer raises ValueError.
This makes `parser.clean()` work correctly.
- Issue #16820: In configparser, ``parser['section'] = {}`` now preserves
section order within the parser. This makes `parser.update()` preserve section
order as well.
- Issue #16820: In configparser, ``parser['DEFAULT'] = {}`` now correctly
clears previous values stored in the default section. Same goes for
``parser.update({'DEFAULT': {}})``.
- Issue #9586: Redefine SEM_FAILED on MacOSX to keep compiler happy.
- Issue #16787: Increase asyncore and asynchat default output buffers size, to
decrease CPU usage and increase throughput.
- Issue #10527: make multiprocessing use poll() instead of select() if available.
- Issue #16688: Now regexes contained backreferences correctly work with
non-ASCII strings. Patch by Matthew Barnett.
- Issue #16486: Make aifc files act as context managers.
- Issue #16485: Now file descriptors are closed if file header patching failed
on closing an aifc file.
- Issue #16640: Run less code under a lock in sched module.
- Issue #16165: sched.scheduler.run() no longer blocks a scheduler for other
threads.
- Issue #16641: Default values of sched.scheduler.enter() are no longer
modifiable.
- Issue #16618: Make glob.glob match consistently across strings and bytes
regarding leading dots. Patch by Serhiy Storchaka.
- Issue #16788: Add samestat to Lib/ntpath.py
- Issue #16713: Parsing of 'tel' urls using urlparse separates params from
path.
- Issue #16443: Add docstrings to regular expression match objects.
Patch by Anton Kasyanov.
- Issue #15701: Fix HTTPError info method call to return the headers information.
- Issue #16752: Add a missing import to modulefinder. Patch by Berker Peksag.
- Issue #16646: ftplib.FTP.makeport() might lose socket error details.
(patch by Serhiy Storchaka)
- Issue #16626: Fix infinite recursion in glob.glob() on Windows when the
pattern contains a wildcard in the drive or UNC path. Patch by Serhiy
Storchaka.
- Issue #15783: Except for the number methods, the C version of decimal now
supports all None default values present in decimal.py. These values were
largely undocumented.
- Issue #11175: argparse.FileType now accepts encoding and errors
arguments. Patch by Lucas Maystre.
- Issue #16488: epoll() objects now support the `with` statement. Patch
by Serhiy Storchaka.
- Issue #16298: In HTTPResponse.read(), close the socket when there is no
Content-Length and the incoming stream is finished. Patch by Eran
Rundstein.
- Issue #16049: Add abc.ABC class to enable the use of inheritance to create
ABCs, rather than the more cumbersome metaclass=ABCMeta. Patch by Bruno
Dupuis.
- Expose the TCP_FASTOPEN and MSG_FASTOPEN flags in socket when they're
available.
- Issue #15701: Add a .headers attribute to urllib.error.HTTPError. Patch
contributed by Berker Peksag.
- Issue #15872: Fix 3.3 regression introduced by the new fd-based shutil.rmtree
that caused it to not ignore certain errors when ignore_errors was set.
Patch by Alessandro Moura and Serhiy Storchaka.
- Issue #16248: Disable code execution from the user's home directory by
tkinter when the -E flag is passed to Python. Patch by Zachary Ware.
- Issue #13390: New function :func:`sys.getallocatedblocks()` returns the
number of memory blocks currently allocated.
- Issue #16628: Fix a memory leak in ctypes.resize().
- Issue #13614: Fix setup.py register failure with invalid rst in description.
Patch by Julien Courteau and Pierre Paul Lefebvre.
- Issue #13512: Create ~/.pypirc securely (CVE-2011-4944). Initial patch by
Philip Jenvey, tested by Mageia and Debian.
- Issue #7719: Make distutils ignore ``.nfs*`` files instead of choking later
on. Initial patch by SilentGhost and Jeff Ramnani.
- Issue #13120: Allow to call pdb.set_trace() from thread.
Patch by Ilya Sandler.
- Issue #16585: Make CJK encoders support error handlers that return bytes per
PEP 383.
- Issue #10182: The re module doesn't truncate indices to 32 bits anymore.
Patch by Serhiy Storchaka.
- Issue #16333: use (",", ": ") as default separator in json when indent is
specified, to avoid trailing whitespace. Patch by Serhiy Storchaka.
- Issue #16573: In 2to3, treat enumerate() like a consuming call, so superfluous
list() calls aren't added to filter(), map(), and zip() which are directly
passed enumerate().
- Issue #16464: Reset the Content-Length header when a urllib Request is reused
with new data.
- Issue #12848: The pure Python pickle implementation now treats object
lengths as unsigned 32-bit integers, like the C implementation does.
Patch by Serhiy Storchaka.
- Issue #16423: urllib.request now has support for ``data:`` URLs. Patch by
Mathias Panzenböck.
- Issue #4473: Add a POP3.stls() to switch a clear-text POP3 session into
an encrypted POP3 session, on supported servers. Patch by Lorenzo Catucci.
- Issue #4473: Add a POP3.capa() method to query the capabilities advertised
by the POP3 server. Patch by Lorenzo Catucci.
- Issue #4473: Ensure the socket is shutdown cleanly in POP3.close().
Patch by Lorenzo Catucci.
- Issue #16522: added FAIL_FAST flag to doctest.
- Issue #15627: Add the importlib.abc.InspectLoader.source_to_code() method.
- Issue #16408: Fix file descriptors not being closed in error conditions
in the zipfile module. Patch by Serhiy Storchaka.
- Issue #14631: Add a new :class:`weakref.WeakMethod` to simulate weak
references to bound methods.
- Issue #16469: Fix exceptions from float -> Fraction and Decimal -> Fraction
conversions for special values to be consistent with those for float -> int
and Decimal -> int. Patch by Alexey Kachayev.
- Issue #16481: multiprocessing no longer leaks process handles on Windows.
- Issue #12428: Add a pure Python implementation of functools.partial().
Patch by Brian Thorne.
- Issue #16140: The subprocess module no longer double closes its child
subprocess.PIPE parent file descriptors on child error prior to exec().
- Remove a bare print to stdout from the subprocess module that could have
happened if the child process wrote garbage to its pre-exec error pipe.
- The subprocess module now raises its own SubprocessError instead of a
RuntimeError in various error situations which should not normally happen.
- Issue #16327: The subprocess module no longer leaks file descriptors
used for stdin/stdout/stderr pipes to the child when fork() fails.
- Issue #14396: Handle the odd rare case of waitpid returning 0 when not
expected in subprocess.Popen.wait().
- Issue #16411: Fix a bug where zlib.decompressobj().flush() might try to access
previously-freed memory. Patch by Serhiy Storchaka.
- Issue #16357: fix calling accept() on a SSLSocket created through
SSLContext.wrap_socket(). Original patch by Jeff McNeil.
- Issue #16409: The reporthook callback made by the legacy
urllib.request.urlretrieve API now properly supplies a constant non-zero
block_size as it did in Python 3.2 and 2.7. This matches the behavior of
urllib.request.URLopener.retrieve.
- Issue #16431: Use the type information when constructing a Decimal subtype
from a Decimal argument.
- Issue #15641: Clean up deprecated classes from importlib
Patch by Taras Lyapun.
- Issue #16350: zlib.decompressobj().decompress() now accumulates data from
successive calls after EOF in unused_data, instead of only saving the argument
to the last call. decompressobj().flush() now correctly sets unused_data and
unconsumed_tail. A bug in the handling of MemoryError when setting the
unconsumed_tail attribute has also been fixed. Patch by Serhiy Storchaka.
- Issue #12759: sre_parse now raises a proper error when the name of the group
is missing. Initial patch by Serhiy Storchaka.
- Issue #16152: fix tokenize to ignore whitespace at the end of the code when
no newline is found. Patch by Ned Batchelder.
- Issue #16284: Prevent keeping unnecessary references to worker functions
in concurrent.futures ThreadPoolExecutor.
- Issue #16230: Fix a crash in select.select() when one the lists changes
size while iterated on. Patch by Serhiy Storchaka.
- Issue #16228: Fix a crash in the json module where a list changes size
while it is being encoded. Patch by Serhiy Storchaka.
- Issue #16351: New function gc.get_stats() returns per-generation collection
statistics.
- Issue #14897: Enhance error messages of struct.pack and
struct.pack_into. Patch by Matti Mäki.
- Issue #16316: mimetypes now recognizes the .xz and .txz (.tar.xz) extensions.
Patch by Serhiy Storchaka.
- Issue #12890: cgitb no longer prints spurious <p> tags in text
mode when the logdir option is specified.
- Issue #16307: Fix multiprocessing.Pool.map_async not calling its callbacks.
Patch by Janne Karila.
- Issue #16305: Fix a segmentation fault occurring when interrupting
math.factorial.
- Issue #16116: Fix include and library paths to be correct when building C
extensions in venvs.
- Issue #16245: Fix the value of a few entities in html.entities.html5.
- Issue #16301: Fix the localhost verification in urllib/request.py for file://
urls.
- Issue #16250: Fix the invocations of URLError which had misplaced filename
attribute for exception.
- Issue #10836: Fix exception raised when file not found in urlretrieve
Initial patch by Ezio Melotti.
- Issue #14398: Fix size truncation and overflow bugs in the bz2 module.
- Issue #12692: Fix resource leak in urllib.request when talking to an HTTP
server that does not include a ``Connection: close`` header in its responses.
- Issue #12034: Fix bogus caching of result in check_GetFinalPathNameByHandle.
Patch by Atsuo Ishimoto.
- Improve performance of `lzma.LZMAFile` (see also issue #16034).
- Issue #16220: wsgiref now always calls close() on an iterable response.
Patch by Brent Tubbs.
- Issue #16270: urllib may hang when used for retrieving files via FTP by using
a context manager. Patch by Giampaolo Rodola'.
- Issue #16461: Wave library should be able to deal with 4GB wav files,
and sample rate of 44100 Hz.
- Issue #16176: Properly identify Windows 8 via platform.platform()
- Issue #16088: BaseHTTPRequestHandler's send_error method includes a
Content-Length header in it's response now. Patch by Antoine Pitrou.
- Issue #16114: The subprocess module no longer provides a misleading error
message stating that args[0] did not exist when either the cwd or executable
keyword arguments specified a path that did not exist.
- Issue #16169: Fix ctypes.WinError()'s confusion between errno and winerror.
- Issue #16110: logging.fileConfig now accepts a pre-initialised ConfigParser
instance.
- Issue #1492704: shutil.copyfile() raises a distinct SameFileError now if
source and destination are the same file. Patch by Atsuo Ishimoto.
- Issue #13896: Make shelf instances work with 'with' as context managers.
Original patch by Filip Gruszczyński.
- Issue #15417: Add support for csh and fish in venv activation scripts.
- Issue #14377: ElementTree.write and some of the module-level functions have
a new parameter - *short_empty_elements*. It controls how elements with no
contents are emitted.
- Issue #16089: Allow ElementTree.TreeBuilder to work again with a non-Element
element_factory (fixes a regression in SimpleTAL).
- Issue #9650: List commonly used format codes in time.strftime and
time.strptime docsttings. Original patch by Mike Hoy.
- Issue #15452: logging configuration socket listener now has a verify option
that allows an application to apply a verification function to the
received configuration data before it is acted upon.
- Issue #16034: Fix performance regressions in the new `bz2.BZ2File`
implementation. Initial patch by Serhiy Storchaka.
- `pty.spawn()` now returns the child process status returned by `os.waitpid()`.
- Issue #15756: `subprocess.poll()` now properly handles `errno.ECHILD` to
return a returncode of 0 when the child has already exited or cannot be waited
on.
- Issue #15323: Improve failure message of `Mock.assert_called_once_with()`.
- Issue #16064: ``unittest -m`` claims executable is "python", not "python3".
- Issue #12376: Pass on parameters in `TextTestResult.__init__()` super call.
- Issue #15222: Insert blank line after each message in mbox mailboxes.
- Issue #16013: Fix `csv.Reader` parsing issue with ending quote characters.
Patch by Serhiy Storchaka.
- Issue #15421: Fix an OverflowError in `Calendar.itermonthdates()` after
`datetime.MAXYEAR`. Patch by Cédric Krier.
- Issue #16112: platform.architecture does not correctly escape argument to
/usr/bin/file. Patch by David Benjamin.
- Issue #15970: `xml.etree.ElementTree` now serializes correctly the empty HTML
elements 'meta' and 'param'.
- Issue #15842: The `SocketIO.{readable,writable,seekable}` methods now raise
ValueError when the file-like object is closed. Patch by Alessandro Moura.
- Issue #15876: Fix a refleak in the `curses` module: window.encoding.
- Issue #15881: Fix `atexit` hook in `multiprocessing`. Original patch by Chris
McDonough.
- Issue #15841: The readable(), writable() and seekable() methods of
`io.BytesIO` and `io.StringIO` objects now raise ValueError when the object
has been closed. Patch by Alessandro Moura.
- Issue #15447: Use `subprocess.DEVNULL` in webbrowser, instead of opening
`os.devnull` explicitly and leaving it open.
- Issue #15509: `webbrowser.UnixBrowser` no longer passes empty arguments to
Popen when ``%action`` substitutions produce empty strings.
- Issue #12776, issue #11839: Call `argparse` type function (specified by
add_argument) only once. Before, the type function was called twice in the
case where the default was specified and the argument was given as well. This
was especially problematic for the FileType type, as a default file would
always be opened, even if a file argument was specified on the command line.
- Issue #15906: Fix a regression in argparse caused by the preceding change,
when ``action='append'``, ``type='str'`` and ``default=[]``.
- Issue #16113: Added sha3 module based on the Keccak reference implementation
3.2. The `hashlib` module has four additional hash algorithms: `sha3_224`,
`sha3_256`, `sha3_384` and `sha3_512`. As part of the patch some common
code was moved from _hashopenssl.c to hashlib.h.
- ctypes.call_commethod was removed, since its only usage was in the defunct
samples directory.
- Issue #16692: Added TLSv1.1 and TLSv1.2 support for the ssl modules.
- Issue #16832: add abc.get_cache_token() to expose cache validity checking
support in ABCMeta.
IDLE
----
- Issue #18429: Format / Format Paragraph, now works when comment blocks
are selected. As with text blocks, this works best when the selection
only includes complete lines.
- Issue #18226: Add docstrings and unittests for FormatParagraph.py.
Original patches by Todd Rovito and Phil Webster.
- Issue #18279: Format - Strip trailing whitespace no longer marks a file as
changed when it has not been changed. This fix followed the addition of a
test file originally written by Phil Webster (the issue's main goal).
- Issue #7136: In the Idle File menu, "New Window" is renamed "New File".
Patch by Tal Einat, Roget Serwy, and Todd Rovito.
- Remove dead imports of imp.
- Issue #18196: Avoid displaying spurious SystemExit tracebacks.
- Issue #5492: Avoid traceback when exiting IDLE caused by a race condition.
- Issue #17511: Keep IDLE find dialog open after clicking "Find Next".
Original patch by Sarah K.
- Issue #18055: Move IDLE off of imp and on to importlib.
- Issue #15392: Create a unittest framework for IDLE.
Initial patch by Rajagopalasarma Jayakrishnan.
See Lib/idlelib/idle_test/README.txt for how to run Idle tests.
- Issue #14146: Highlight source line while debugging on Windows.
- Issue #17838: Allow sys.stdin to be reassigned.
- Issue #13495: Avoid loading the color delegator twice in IDLE.
- Issue #17798: Allow IDLE to edit new files when specified on command line.
- Issue #14735: Update IDLE docs to omit "Control-z on Windows".
- Issue #17532: Always include Options menu for IDLE on OS X.
Patch by Guilherme Simões.
- Issue #17585: Fixed IDLE regression. Now closes when using exit() or quit().
- Issue #17657: Show full Tk version in IDLE's about dialog.
Patch by Todd Rovito.
- Issue #17613: Prevent traceback when removing syntax colorizer in IDLE.
- Issue #1207589: Backwards-compatibility patch for right-click menu in IDLE.
- Issue #16887: IDLE now accepts Cancel in tabify/untabify dialog box.
- Issue #17625: In IDLE, close the replace dialog after it is used.
- Issue #14254: IDLE now handles readline correctly across shell restarts.
- Issue #17614: IDLE no longer raises exception when quickly closing a file.
- Issue #6698: IDLE now opens just an editor window when configured to do so.
- Issue #8900: Using keyboard shortcuts in IDLE to open a file no longer
raises an exception.
- Issue #6649: Fixed missing exit status in IDLE. Patch by Guilherme Polo.
- Issue #17114: IDLE now uses non-strict config parser.
- Issue #9290: In IDLE the sys.std* streams now implement io.TextIOBase
interface and support all mandatory methods and properties.
- Issue #5066: Update IDLE docs. Patch by Todd Rovito.
- Issue #16829: IDLE printing no longer fails if there are spaces or other
special characters in the file path.
- Issue #16491: IDLE now prints chained exception tracebacks.
- Issue #16819: IDLE method completion now correctly works for bytes literals.
- Issue #16504: IDLE now catches SyntaxErrors raised by tokenizer. Patch by
Roger Serwy.
- Issue #16511: Use default IDLE width and height if config param is not valid.
Patch Serhiy Storchaka.
- Issue #1207589: Add Cut/Copy/Paste items to IDLE right click Context Menu
Patch by Todd Rovito.
- Issue #16123: IDLE - deprecate running without a subprocess.
Patch by Roger Serwy.
Tests
-----
- Issue #1666318: Add a test that shutil.copytree() retains directory
permissions. Patch by Catherine Devlin.
- Issue #18273: move the tests in Lib/test/json_tests to Lib/test/test_json
and make them discoverable by unittest. Patch by Zachary Ware.
- Fix a fcntl test case on KFreeBSD, Debian #708653 (Petr Salinger).
- Issue #18396: Fix spurious test failure in test_signal on Windows when
faulthandler is enabled (Patch by Jeremy Kloth)
- Issue #17046: Fix broken test_executable_without_cwd in test_subprocess.
- Issue #15415: Add new temp_dir() and change_cwd() context managers to
test.support, and refactor temp_cwd() to use them. Patch by Chris Jerdonek.
- Issue #15494: test.support is now a package rather than a module (Initial
patch by Indra Talip)
- Issue #17944: test_zipfile now discoverable and uses subclassing to
generate tests for different compression types. Fixed a bug with skipping
some tests due to use of exhausted iterators.
- Issue #18266: test_largefile now works with unittest test discovery and
supports running only selected tests. Patch by Zachary Ware.
- Issue #17767: test_locale now works with unittest test discovery.
Original patch by Zachary Ware.
- Issue #18375: Assume --randomize when --randseed is used for running the
testsuite.
- Issue #11185: Fix test_wait4 under AIX. Patch by Sébastien Sablé.
- Issue #18207: Fix test_ssl for some versions of OpenSSL that ignore seconds
in ASN1_TIME fields.
- Issue #18094: test_uuid no longer reports skipped tests as passed.
- Issue #17992: Add timeouts to asyncore and asynchat tests so that they won't
accidentally hang.
- Issue #17833: Fix test_gdb failures seen on machines where debug symbols
for glibc are available (seen on PPC64 Linux).
- Issue #7855: Add tests for ctypes/winreg for issues found in IronPython.
Initial patch by Dino Viehland.
- Issue #11078: test___all__ now checks for duplicates in __all__.
Initial patch by R. David Murray.
- Issue #17712: Fix test_gdb failures on Ubuntu 13.04.
- Issue #17835: Fix test_io when the default OS pipe buffer size is larger
than one million bytes.
- Issue #17065: Use process-unique key for winreg tests to avoid failures if
test is run multiple times in parallel (eg: on a buildbot host).
- Issue #12820: add tests for the xml.dom.minicompat module.
Patch by John Chandler and Phil Connell.
- Issue #17691: test_univnewlines now works with unittest test discovery.
Patch by Zachary Ware.
- Issue #17790: test_set now works with unittest test discovery.
Patch by Zachary Ware.
- Issue #17789: test_random now works with unittest test discovery.
Patch by Zachary Ware.
- Issue #17779: test_osx_env now works with unittest test discovery.
Patch by Zachary Ware.
- Issue #17766: test_iterlen now works with unittest test discovery.
Patch by Zachary Ware.
- Issue #17690: test_time now works with unittest test discovery.
Patch by Zachary Ware.
- Issue #17692: test_sqlite now works with unittest test discovery.
Patch by Zachary Ware.
- Issue #11995: test_pydoc doesn't import all sys.path modules anymore.
- Issue #17448: test_sax now skips if there are no xml parsers available
instead of raising an ImportError.
- Issue #11420: make test suite pass with -B/DONTWRITEBYTECODE set.
Initial patch by Thomas Wouters.
- Issue #10652: make tcl/tk tests run after __all__ test, patch by
Zachary Ware.
- Issue #11963: remove human verification from test_parser and test_subprocess.
- Issue #11732: add a new suppress_crash_popup() context manager to test.support
that disables crash popups on Windows and use it in test_faulthandler and
test_capi.
- Issue #13898: test_ssl no longer prints a spurious stack trace on Ubuntu.
- Issue #17283: Share code between `__main__.py` and `regrtest.py` in
`Lib/test`.
- Issue #17249: convert a test in test_capi to use unittest and reap threads.
- Issue #17107: Test client-side SNI support in urllib.request thanks to
the new server-side SNI support in the ssl module. Initial patch by
Daniel Black.
- Issue #17041: Fix testing when Python is configured with the
--without-doc-strings.
- Issue #16923: Fix ResourceWarnings in test_ssl.
- Issue #15539: Added regression tests for Tools/scripts/pindent.py.
- Issue #17479: test_io now works with unittest test discovery.
Patch by Zachary Ware.
- Issue #17066: test_robotparser now works with unittest test discovery.
Patch by Zachary Ware.
- Issue #17334: test_index now works with unittest test discovery.
Patch by Zachary Ware.
- Issue #17333: test_imaplib now works with unittest test discovery.
Patch by Zachary Ware.
- Issue #17082: test_dbm* now work with unittest test discovery.
Patch by Zachary Ware.
- Issue #17079: test_ctypes now works with unittest test discovery.
Patch by Zachary Ware.
- Issue #17304: test_hash now works with unittest test discovery.
Patch by Zachary Ware.
- Issue #17303: test_future* now work with unittest test discovery.
Patch by Zachary Ware.
- Issue #17163: test_file now works with unittest test discovery.
Patch by Zachary Ware.
- Issue #16925: test_configparser now works with unittest test discovery.
Patch by Zachary Ware.
- Issue #16918: test_codecs now works with unittest test discovery.
Patch by Zachary Ware.
- Issue #16919: test_crypt now works with unittest test discovery.
Patch by Zachary Ware.
- Issue #16910: test_bytes, test_unicode, and test_userstring now work with
unittest test discovery. Patch by Zachary Ware.
- Issue #16905: test_warnings now works with unittest test discovery.
Initial patch by Berker Peksag.
- Issue #16898: test_bufio now works with unittest test discovery.
Patch by Zachary Ware.
- Issue #16888: test_array now works with unittest test discovery.
Patch by Zachary Ware.
- Issue #16896: test_asyncore now works with unittest test discovery.
Patch by Zachary Ware.
- Issue #16897: test_bisect now works with unittest test discovery.
Initial patch by Zachary Ware.
- Issue #16852: test_genericpath, test_posixpath, test_ntpath, and test_macpath
now work with unittest test discovery. Patch by Zachary Ware.
- Issue #16748: test_heapq now works with unittest test discovery.
- Issue #10646: Tests rearranged for os.samefile/samestat to check for not
just symlinks but also hard links.
- Issue #15302: Switch regrtest from using getopt to using argparse.
- Issue #15324: Fix regrtest parsing of --fromfile, --match, and --randomize
options.
- Issue #16702: test_urllib2_localnet tests now correctly ignores proxies for
localhost tests.
- Issue #16664: Add regression tests for glob's behaviour concerning entries
starting with a ".". Patch by Sebastian Kreft.
- Issue #13390: The ``-R`` option to regrtest now also checks for memory
allocation leaks, using :func:`sys.getallocatedblocks()`.
- Issue #16559: Add more tests for the json module, including some from the
official test suite at json.org. Patch by Serhiy Storchaka.
- Issue #16661: Fix the `os.getgrouplist()` test by not assuming that it gives
the same output as :command:`id -G`.
- Issue #16115: Add some tests for the executable argument to
subprocess.Popen(). Initial patch by Kushal Das.
- Issue #16126: PyErr_Format format mismatch in _testcapimodule.c.
Patch by Serhiy Storchaka.
- Issue #15304: Fix warning message when `os.chdir()` fails inside
`test.support.temp_cwd()`. Patch by Chris Jerdonek.
- Issue #15802: Fix test logic in `TestMaildir.test_create_tmp()`. Patch by
Serhiy Storchaka.
- Issue #15557: Added a test suite for the webbrowser module, thanks to Anton
Barkovsky.
- Issue #16698: Skip posix test_getgroups when built with OS X
deployment target prior to 10.6.
Build
-----
- Issue #16067: Add description into MSI file to replace installer's
temporary name.
- Issue #18257: Fix readlink usage in python-config. Install the python
version again on Darwin.
- Issue #18481: Add C coverage reporting with gcov and lcov. A new make target
"coverage-report" creates an instrumented Python build, runs unit tests
and creates a HTML. The report can be updated with "make coverage-lcov".
- Issue #17845: Clarified the message printed when some module are not built.
- Issue #18256: Compilation fix for recent AIX releases. Patch by
David Edelsohn.
- Issue #17547: In configure, explicitly pass -Wformat for the benefit for GCC
4.8.
- Issue #15172: Document NASM 2.10+ as requirement for building OpenSSL 1.0.1
on Windows.
- Issue #17591: Use lowercase filenames when including Windows header files.
Patch by Roumen Petrov.
- Issue #17550: Fix the --enable-profiling configure switch.
- Issue #17425: Build with openssl 1.0.1d on Windows.
- Issue #16754: Fix the incorrect shared library extension on linux. Introduce
two makefile macros SHLIB_SUFFIX and EXT_SUFFIX. SO now has the value of
SHLIB_SUFFIX again (as in 2.x and 3.1). The SO macro is removed in 3.4.
- Issue #5033: Fix building of the sqlite3 extension module when the
SQLite library version has "beta" in it. Patch by Andreas Pelme.
- Issue #17228: Fix building without pymalloc.
- Issue #3718: Use AC_ARG_VAR to set MACHDEP in configure.ac.
- Issue #16235: Implement python-config as a shell script.
- Issue #16769: Remove outdated Visual Studio projects.
- Issue #17031: Fix running regen in cross builds.
- Issue #3754: fix typo in pthread AC_CACHE_VAL.
- Issue #15484: Fix _PYTHON_PROJECT_BASE for srcdir != builddir builds;
use _PYTHON_PROJECT_BASE in distutils/sysconfig.py.
- Drop support for Windows 2000 (changeset e52df05b496a).
- Issue #17029: Let h2py search the multiarch system include directory.
- Issue #16953: Fix socket module compilation on platforms with
HAVE_BROKEN_POLL. Patch by Jeffrey Armstrong.
- Issue #16320: Remove redundant Makefile dependencies for strings and bytes.
- Cross compiling needs host and build settings. configure no longer
creates a broken PYTHON_FOR_BUILD variable when --build is missing.
- Fix cross compiling issue in setup.py, ensure that lib_dirs and inc_dirs are
defined in cross compiling mode, too.
- Issue #16836: Enable IPv6 support even if IPv6 is disabled on the build host.
- Issue #16593: Have BSD 'make -s' do the right thing, thanks to Daniel Shahaf
- Issue #16262: fix out-of-src-tree builds, if mercurial is not installed.
- Issue #15298: ensure _sysconfigdata is generated in build directory, not
source directory.
- Issue #15833: Fix a regression in 3.3 that resulted in exceptions being
raised if importlib failed to write byte-compiled files. This affected
attempts to build Python out-of-tree from a read-only source directory.
- Issue #15923: Fix a mistake in ``asdl_c.py`` that resulted in a TypeError
after 2801bf875a24 (see #15801).
- Issue #16135: Remove OS/2 support.
- Issue #15819: Make sure we can build Python out-of-tree from a read-only
source directory. (Somewhat related to issue #9860.)
- Issue #15587: Enable Tk high-resolution text rendering on Macs with
Retina displays. Applies to Tkinter apps, such as IDLE, on OS X
framework builds linked with Cocoa Tk 8.5.
- Issue #17161: make install now also installs a python3 man page.
C-API
-----
- Issue #18351: Fix various issues in a function in importlib provided to help
PyImport_ExecCodeModuleWithPathnames() (and thus by extension
PyImport_ExecCodeModule() and PyImport_ExecCodeModuleEx()).
- Issue #9369: The types of `char*` arguments of PyObject_CallFunction() and
PyObject_CallMethod() now changed to `const char*`. Based on patches by
Jörg Müller and Lars Buitinck.
- Issue #17206: Py_CLEAR(), Py_DECREF(), Py_XINCREF() and Py_XDECREF() now
expand their arguments once instead of multiple times. Patch written by Illia
Polosukhin.
- Issue #17522: Add the PyGILState_Check() API.
- Issue #17327: Add PyDict_SetDefault.
- Issue #16881: Fix Py_ARRAY_LENGTH macro for GCC < 3.1.
- Issue #16505: Remove unused Py_TPFLAGS_INT_SUBCLASS.
- Issue #16086: PyTypeObject.tp_flags and PyType_Spec.flags are now unsigned
(unsigned long and unsigned int) to avoid an undefined behaviour with
Py_TPFLAGS_TYPE_SUBCLASS ((1 << 31). PyType_GetFlags() result type is
now unsigned too (unsigned long, instead of long).
- Issue #16166: Add PY_LITTLE_ENDIAN and PY_BIG_ENDIAN macros and unified
endianness detection and handling.
Documentation
-------------
- Issue #17701: Improving strftime documentation.
- Issue #18440: Clarify that `hash()` can truncate the value returned from an
object's custom `__hash__()` method.
- Issue #17844: Add links to encoders and decoders for bytes-to-bytes codecs.
- Issue #14097: improve the "introduction" page of the tutorial.
- Issue #17977: The documentation for the cadefault argument's default value
in urllib.request.urlopen() is fixed to match the code.
- Issue #6696: add documentation for the Profile objects, and improve
profile/cProfile docs. Patch by Tom Pinckney.
- Issue #15940: Specify effect of locale on time functions.
- Issue #17538: Document XML vulnerabilties
- Issue #16642: sched.scheduler timefunc initial default is time.monotonic.
Patch by Ramchandra Apte
- Issue #17047: remove doubled words in docs and docstrings
reported by Serhiy Storchaka and Matthew Barnett.
- Issue #15465: Document the versioning macros in the C API docs rather than
the standard library docs. Patch by Kushal Das.
- Issue #16406: Combine the pages for uploading and registering to PyPI.
- Issue #16403: Document how distutils uses the maintainer field in
PKG-INFO. Patch by Jyrki Pulliainen.
- Issue #16695: Document how glob handles filenames starting with a
dot. Initial patch by Jyrki Pulliainen.
- Issue #8890: Stop advertising an insecure practice by replacing uses
of the /tmp directory with better alternatives in the documentation.
Patch by Geoff Wilson.
- Issue #17203: add long option names to unittest discovery docs.
- Issue #13094: add "Why do lambdas defined in a loop with different values
all return the same result?" programming FAQ.
- Issue #14901: Update portions of the Windows FAQ.
Patch by Ashish Nitin Patil.
- Issue #16267: Better document the 3.3+ approach to combining
@abstractmethod with @staticmethod, @classmethod and @property
- Issue #15209: Clarify exception chaining description in exceptions module
documentation
- Issue #15990: Improve argument/parameter documentation.
- Issue #16209: Move the documentation for the str built-in function to a new
str class entry in the "Text Sequence Type" section.
- Issue #13538: Improve str() and object.__str__() documentation.
- Issue #16489: Make it clearer that importlib.find_loader() needs parent
packages to be explicitly imported.
- Issue #16400: Update the description of which versions of a given package
PyPI displays.
- Issue #15677: Document that zlib and gzip accept a compression level of 0 to
mean 'no compression'. Patch by Brian Brazil.
- Issue #16197: Update winreg docstrings and documentation to match code.
Patch by Zachary Ware.
- Issue #8040: added a version switcher to the documentation. Patch by
Yury Selivanov.
- Issue #16241: Document -X faulthandler command line option.
Patch by Marek Šuppa.
- Additional comments and some style changes in the concurrent.futures URL
retrieval example
- Issue #16115: Improve subprocess.Popen() documentation around args, shell,
and executable arguments.
- Issue #13498: Clarify docs of os.makedirs()'s exist_ok argument. Done with
great native-speaker help from R. David Murray.
- Issue #15533: Clarify docs and add tests for `subprocess.Popen()`'s cwd
argument.
- Issue #15979: Improve timeit documentation.
- Issue #16036: Improve documentation of built-in `int()`'s signature and
arguments.
- Issue #15935: Clarification of `argparse` docs, re: add_argument() type and
default arguments. Patch contributed by Chris Jerdonek.
- Issue #11964: Document a change in v3.2 to the behavior of the indent
parameter of json encoding operations.
- Issue #15116: Remove references to appscript as it is no longer being
supported.
Tools/Demos
-----------
- Issue #18817: Fix a resource warning in Lib/aifc.py demo. Patch by
Vajrasky Kok.
- Issue #18439: Make patchcheck work on Windows for ACKS, NEWS.
- Issue #18448: Fix a typo in Tools/demo/eiffel.py.
- Issue #18457: Fixed saving of formulas and complex numbers in
Tools/demo/ss1.py.
- Issue #18449: Make Tools/demo/ss1.py work again on Python 3. Patch by
Févry Thibault.
- Issue #12990: The "Python Launcher" on OSX could not launch python scripts
that have paths that include wide characters.
- Issue #15239: Make mkstringprep.py work again on Python 3.
- Issue #17028: Allowed Python arguments to be supplied to the Windows
launcher.
- Issue #17156: pygettext.py now detects the encoding of source files and
correctly writes and escapes non-ascii characters.
- Issue #15539: Fix a number of bugs in Tools/scripts/pindent.py. Now
pindent.py works with a "with" statement. pindent.py no longer produces
improper indentation. pindent.py now works with continued lines broken after
"class" or "def" keywords and with continuations at the start of line.
- Issue #11797: Add a 2to3 fixer that maps reload() to imp.reload().
- Issue #10966: Remove the concept of unexpected skipped tests.
- Issue #9893: Removed the Misc/Vim directory.
- Removed the Misc/TextMate directory.
- Issue #16245: Add the Tools/scripts/parse_html5_entities.py script to parse
the list of HTML5 entities and update the html.entities.html5 dictionary.
- Issue #15378: Fix Tools/unicode/comparecodecs.py. Patch by Serhiy Storchaka.
- Issue #16549: Make json.tool work again on Python 3 and add tests.
Initial patch by Berker Peksag and Serhiy Storchaka.
- Issue #13301: use ast.literal_eval() instead of eval() in Tools/i18n/msgfmt.py
Patch by Serhiy Storchaka.
Windows
-------
- Issue #18569: The installer now adds .py to the PATHEXT variable when extensions
are registered. Patch by Paul Moore.
What's New in Python 3.3.0?
===========================
*Release date: 29-Sep-2012*
Core and Builtins
-----------------
- Issue #16046: Fix loading sourceless legacy .pyo files.
- Issue #16060: Fix refcounting bug when `__trunc__()` returns an object whose
`__int__()` gives a non-integer. Patch by Serhiy Storchaka.
Extension Modules
-----------------
- Issue #16012: Fix a regression in pyexpat. The parser's `UseForeignDTD()`
method doesn't require an argument again.
What's New in Python 3.3.0 Release Candidate 3?
===============================================
*Release date: 23-Sep-2012*
Core and Builtins
-----------------
- Issue #15900: Fix reference leak in `PyUnicode_TranslateCharmap()`.
- Issue #15926: Fix crash after multiple reinitializations of the interpreter.
- Issue #15895: Fix FILE pointer leak in one error branch of
`PyRun_SimpleFileExFlags()` when filename points to a pyc/pyo file, closeit is
false an and set_main_loader() fails.
- Fixes for a few crash and memory leak regressions found by Coverity.
Library
-------
- Issue #15882: Change `_decimal` to accept any coefficient tuple when
constructing infinities. This is done for backwards compatibility with
decimal.py: Infinity coefficients are undefined in _decimal (in accordance
with the specification).
- Issue #15925: Fix a regression in `email.util` where the `parsedate()` and
`parsedate_tz()` functions did not return None anymore when the argument could
not be parsed.
Extension Modules
-----------------
- Issue #15973: Fix a segmentation fault when comparing datetime timezone
objects.
- Issue #15977: Fix memory leak in Modules/_ssl.c when the function
_set_npn_protocols() is called multiple times, thanks to Daniel Sommermann.
- Issue #15969: `faulthandler` module: rename dump_tracebacks_later() to
dump_traceback_later() and cancel_dump_tracebacks_later() to
cancel_dump_traceback_later().
- _decimal module: use only C 89 style comments.
What's New in Python 3.3.0 Release Candidate 2?
===============================================
*Release date: 09-Sep-2012*
Core and Builtins
-----------------
- Issue #13992: The trashcan mechanism is now thread-safe. This eliminates
sporadic crashes in multi-thread programs when several long deallocator chains
ran concurrently and involved subclasses of built-in container types.
- Issue #15784: Modify `OSError`.__str__() to better distinguish between errno
error numbers and Windows error numbers.
- Issue #15781: Fix two small race conditions in import's module locking.
Library
-------
- Issue #17158: Add 'symbols' to help() welcome message; clarify
'modules spam' messages.
- Issue #15847: Fix a regression in argparse, which did not accept tuples as
argument lists anymore.
- Issue #15828: Restore support for C extensions in `imp.load_module()`.
- Issue #15340: Fix importing the random module when ``/dev/urandom`` cannot be
opened. This was a regression caused by the hash randomization patch.
- Issue #10650: Deprecate the watchexp parameter of the `Decimal.quantize()`
method.
- Issue #15785: Modify `window.get_wch()` API of the curses module: return a
character for most keys, and an integer for special keys, instead of always
returning an integer. So it is now possible to distinguish special keys like
keypad keys.
- Issue #14223: Fix `window.addch()` of the curses module for special characters
like curses.ACS_HLINE: the Python function addch(int) and addch(bytes) is now
calling the C function waddch()/mvwaddch() (as it was done in Python 3.2),
instead of wadd_wch()/mvwadd_wch(). The Python function addch(str) is still
calling the C function wadd_wch()/mvwadd_wch() if the Python curses is linked
to libncursesw.
Build
-----
- Issue #15822: Really ensure 2to3 grammar pickles are properly installed
(replaces fixes for Issue #15645).
Documentation
-------------
- Issue #15814: The memoryview enhancements in 3.3.0 accidentally permitted the
hashing of multi-dimensional memorviews and memoryviews with multi-byte item
formats. The intended restrictions have now been documented - they will be
correctly enforced in 3.3.1.
What's New in Python 3.3.0 Release Candidate 1?
===============================================
*Release date: 25-Aug-2012*
Core and Builtins
-----------------
- Issue #15573: memoryview comparisons are now performed by value with full
support for any valid struct module format definition.
- Issue #15316: When an item in the fromlist for `__import__()` doesn't exist,
don't raise an error, but if an exception is raised as part of an import do
let that propagate.
- Issue #15778: Ensure that ``str(ImportError(msg))`` returns a str even when
msg isn't a str.
- Issue #2051: Source file permission bits are once again correctly copied to
the cached bytecode file. (The migration to importlib reintroduced this
problem because these was no regression test. A test has been added as part of
this patch)
- Issue #15761: Fix crash when ``PYTHONEXECUTABLE`` is set on Mac OS X.
- Issue #15726: Fix incorrect bounds checking in PyState_FindModule. Patch by
Robin Schreiber.
- Issue #15604: Update uses of `PyObject_IsTrue()` to check for and handle
errors correctly. Patch by Serhiy Storchaka.
- Issue #14846: `importlib.FileFinder` now handles the case where the directory
being searched is removed after a previous import attempt.
Library
-------
- Issue #13370: Ensure that ctypes works on Mac OS X when Python is compiled
using the clang compiler.
- Issue #13072: The array module's 'u' format code is now deprecated and will be
removed in Python 4.0.
- Issue #15544: Fix Decimal.__float__ to work with payload-carrying NaNs.
- Issue #15776: Allow pyvenv to work in existing directory with --clean.
- Issue #15249: email's BytesGenerator now correctly mangles From lines (when
requested) even if the body contains undecodable bytes.
- Issue #15777: Fix a refleak in _posixsubprocess.
- Issue ##665194: Update `email.utils.localtime` to use datetime.astimezone and
correctly handle historic changes in UTC offsets.
- Issue #15199: Fix JavaScript's default MIME type to application/javascript.
Patch by Bohuslav Kabrda.
- Issue #12643: `code.InteractiveConsole` now respects `sys.excepthook` when
displaying exceptions. Patch by Aaron Iles.
- Issue #13579: `string.Formatter` now understands the 'a' conversion specifier.
- Issue #15595: Fix ``subprocess.Popen(universal_newlines=True)`` for certain
locales (utf-16 and utf-32 family). Patch by Chris Jerdonek.
- Issue #15477: In cmath and math modules, add workaround for platforms whose
system-supplied log1p function doesn't respect signs of zeros.
- Issue #15715: `importlib.__import__()` will silence an ImportError when the
use of fromlist leads to a failed import.
- Issue #14669: Fix pickling of connections and sockets on Mac OS X by
sending/receiving an acknowledgment after file descriptor transfer.
TestPicklingConnection has been reenabled for Mac OS X.
- Issue #11062: Fix adding a message from file to Babyl mailbox.
- Issue #15646: Prevent equivalent of a fork bomb when using `multiprocessing`
on Windows without the ``if __name__ == '__main__'`` idiom.
IDLE
----
- Issue #15678: Fix IDLE menus when started from OS X command line (3.3.0b2
regression).
Documentation
-------------
- Touched up the Python 2 to 3 porting guide.
- Issue #14674: Add a discussion of the `json` module's standard compliance.
Patch by Chris Rebert.
- Create a 'Concurrent Execution' section in the docs, and split up the
'Optional Operating System Services' section to use a more user-centric
classification scheme (splitting them across the new CE section, IPC and text
processing). Operating system limitations can be reflected with the Sphinx
``:platform:`` tag, it doesn't make sense as part of the Table of Contents.
- Issue #4966: Bring the sequence docs up to date for the Py3k transition and
the many language enhancements since they were original written.
- The "path importer" misnomer has been replaced with Eric Snow's
more-awkward-but-at-least-not-wrong suggestion of "path based finder" in the
import system reference docs.
- Issue #15640: Document `importlib.abc.Finder` as deprecated.
- Issue #15630: Add an example for "continue" stmt in the tutorial. Patch by
Daniel Ellis.
Tests
-----
- Issue #15747: ZFS always returns EOPNOTSUPP when attempting to set the
UF_IMMUTABLE flag (via either chflags or lchflags); refactor affected tests in
test_posix.py to account for this.
- Issue #15285: Refactor the approach for testing connect timeouts using two
external hosts that have been configured specifically for this type of test.
- Issue #15743: Remove the deprecated method usage in `urllib` tests. Patch by
Jeff Knupp.
- Issue #15615: Add some tests for the `json` module's handling of invalid input
data. Patch by Kushal Das.
Build
-----
- Output lib files for PGO build into PGO directory.
- Pick up 32-bit launcher from PGO directory on 64-bit PGO build.
- Drop ``PC\python_nt.h`` as it's not used. Add input dependency on custom
build step.
- Issue #15511: Drop explicit dependency on pythonxy.lib from _decimal amd64
configuration.
- Add missing PGI/PGO configurations for pywlauncher.
- Issue #15645: Ensure 2to3 grammar pickles are properly installed.
What's New in Python 3.3.0 Beta 2?
==================================
*Release date: 12-Aug-2012*
Core and Builtins
-----------------
- Issue #15568: Fix the return value of ``yield from`` when StopIteration is
raised by a custom iterator.
- Issue #13119: `sys.stdout` and `sys.stderr` are now using "\r\n" newline on
Windows, as Python 2.
- Issue #15534: Fix the fast-search function for non-ASCII Unicode strings.
- Issue #15508: Fix the docstring for `__import__()` to have the proper default
value of 0 for 'level' and to not mention negative levels since they are not
supported.
- Issue #15425: Eliminated traceback noise from more situations involving
importlib.
- Issue #14578: Support modules registered in the Windows registry again.
- Issue #15466: Stop using TYPE_INT64 in marshal, to make importlib.h (and other
byte code files) equal between 32-bit and 64-bit systems.
- Issue #1692335: Move initial exception args assignment to
`BaseException.__new__()` to help pickling of naive subclasses.
- Issue #12834: Fix `PyBuffer_ToContiguous()` for non-contiguous arrays.
- Issue #15456: Fix code `__sizeof__()` after #12399 change. Patch by Serhiy
Storchaka.
- Issue #15404: Refleak in PyMethodObject repr.
- Issue #15394: An issue in `PyModule_Create()` that caused references to be
leaked on some error paths has been fixed. Patch by Julia Lawall.
- Issue #15368: An issue that caused bytecode generation to be non-deterministic
has been fixed.
- Issue #15202: Consistently use the name "follow_symlinks" for new parameters
in os and shutil functions.
- Issue #15314: ``__main__.__loader__`` is now set correctly during interpreter
startup.
- Issue #15111: When a module imported using 'from import' has an ImportError
inside itself, don't mask that fact behind a generic ImportError for the
module itself.
- Issue #15293: Add GC support to the AST base node type.
- Issue #15291: Fix a memory leak where AST nodes where not properly
deallocated.
- Issue #15110: Fix the tracebacks generated by "import xxx" to not show the
importlib stack frames.
- Issue #16369: Global PyTypeObjects not initialized with PyType_Ready(...).
- Issue #15020: The program name used to search for Python's path is now
"python3" under Unix, not "python".
- Issue #15897: zipimport.c doesn't check return value of fseek().
Patch by Felipe Cruz.
- Issue #15033: Fix the exit status bug when modules invoked using -m switch,
return the proper failure return value (1). Patch contributed by Jeff Knupp.
- Issue #15229: An `OSError` subclass whose __init__ doesn't call back
OSError.__init__ could produce incomplete instances, leading to crashes when
calling str() on them.
- Issue #15307: Virtual environments now use symlinks with framework builds on
Mac OS X, like other POSIX builds.
Library
-------
- Issue #14590: configparser now correctly strips inline comments when delimiter
occurs earlier without preceding space.
- Issue #15424: Add a `__sizeof__()` implementation for array objects. Patch by
Ludwig Hähne.
- Issue #15576: Allow extension modules to act as a package's __init__ module.
- Issue #15502: Have `importlib.invalidate_caches()` work on `sys.meta_path`
instead of `sys.path_importer_cache`.
- Issue #15163: Pydoc shouldn't list __loader__ as module data.
- Issue #15471: Do not use mutable objects as defaults for
`importlib.__import__()`.
- Issue #15559: To avoid a problematic failure mode when passed to the bytes
constructor, objects in the ipaddress module no longer implement `__index__()`
(they still implement `__int__()` as appropriate).
- Issue #15546: Fix handling of pathological input data in the peek() and
read1() methods of the BZ2File, GzipFile and LZMAFile classes.
- Issue #12655: Instead of requiring a custom type, `os.sched_getaffinity()` and
`os.sched_setaffinity()` now use regular sets of integers to represent the
CPUs a process is restricted to.
- Issue #15538: Fix compilation of the `socket.getnameinfo()` /
`socket.getaddrinfo()` emulation code. Patch by Philipp Hagemeister.
- Issue #15519: Properly expose WindowsRegistryFinder in importlib (and use the
correct term for it). Original patch by Eric Snow.
- Issue #15502: Bring the importlib ABCs into line with the current state of the
import protocols given PEP 420. Original patch by Eric Snow.
- Issue #15499: Launching a webbrowser in Unix used to sleep for a few seconds.
Original patch by Anton Barkovsky.
- Issue #15463: The faulthandler module truncates strings to 500 characters,
instead of 100, to be able to display long file paths.
- Issue #6056: Make `multiprocessing` use setblocking(True) on the sockets it
uses. Original patch by J Derek Wilson.
- Issue #15364: Fix sysconfig.get_config_var('srcdir') to be an absolute path.
- Issue #15413: `os.times()` had disappeared under Windows.
- Issue #15402: An issue in the struct module that caused `sys.getsizeof()` to
return incorrect results for struct.Struct instances has been fixed. Initial
patch by Serhiy Storchaka.
- Issue #15232: When mangle_from is True, `email.Generator` now correctly
mangles lines that start with 'From ' that occur in a MIME preamble or
epilogue.
- Issue #15094: Incorrectly placed #endif in _tkinter.c. Patch by Serhiy
Storchaka.
- Issue #13922: `argparse` no longer incorrectly strips '--'s that appear after
the first one.
- Issue #12353: `argparse` now correctly handles null argument values.
- Issue #10017, issue #14998: Fix TypeError using pprint on dictionaries with
user-defined types as keys or other unorderable keys.
- Issue #15397: `inspect.getmodulename()` is now based directly on importlib via
a new `importlib.machinery.all_suffixes()` API.
- Issue #14635: `telnetlib` will use poll() rather than select() when possible to
avoid failing due to the select() file descriptor limit.
- Issue #15180: Clarify posixpath.join() error message when mixing str & bytes.
- Issue #15343: pkgutil now includes an iter_importer_modules implementation for
importlib.machinery.FileFinder (similar to the way it already handled
zipimport.zipimporter).
- Issue #15314: runpy now sets __main__.__loader__ correctly.
- Issue #15357: The import emulation in pkgutil is now deprecated. pkgutil uses
importlib internally rather than the emulation.
- Issue #15233: Python now guarantees that callables registered with the atexit
module will be called in a deterministic order.
- Issue #15238: `shutil.copystat()` now copies Linux "extended attributes".
- Issue #15230: runpy.run_path now correctly sets __package__ as described in
the documentation.
- Issue #15315: Support VS 2010 in distutils cygwincompiler.
- Issue #15294: Fix a regression in pkgutil.extend_path()'s handling of nested
namespace packages.
- Issue #15056: `imp.cache_from_source()` and `imp.source_from_cache()` raise
NotImplementedError when `sys.implementation.cache_tag` is set to None.
- Issue #15256: Grammatical mistake in exception raised by `imp.find_module()`.
- Issue #5931: `wsgiref` environ variable SERVER_SOFTWARE will specify an
implementation specific term like CPython, Jython instead of generic "Python".
- Issue #13248: Remove obsolete argument "max_buffer_size" of BufferedWriter and
BufferedRWPair, from the io module.
- Issue #13248: Remove obsolete argument "version" of `argparse.ArgumentParser`.
- Issue #14814: Implement more consistent ordering and sorting behaviour for
ipaddress objects.
- Issue #14814: `ipaddress` network objects correctly return NotImplemented when
compared to arbitrary objects instead of raising TypeError.
- Issue #14990: Correctly fail with SyntaxError on invalid encoding declaration.
- Issue #14814: `ipaddress` now provides more informative error messages when
constructing instances directly (changes permitted during beta due to
provisional API status).
- Issue #15247: `io.FileIO` now raises an error when given a file descriptor
pointing to a directory.
- Issue #15261: Stop os.stat(fd) crashing on Windows when fd not open.
- Issue #15166: Implement `imp.get_tag()` using `sys.implementation.cache_tag`.
- Issue #15210: Catch KeyError when `importlib.__init__()` can't find
_frozen_importlib in sys.modules, not ImportError.
- Issue #15030: `importlib.abc.PyPycLoader` now supports the new source size
header field in .pyc files.
- Issue #5346: Preserve permissions of mbox, MMDF and Babyl mailbox files on
flush().
- Issue #10571: Fix the "--sign" option of distutils' upload command. Patch by
Jakub Wilk.
- Issue #9559: If messages were only added, a new file is no longer created and
renamed over the old file when flush() is called on an mbox, MMDF or Babyl
mailbox.
- Issue #10924: Fixed `crypt.mksalt()` to use a RNG that is suitable for
cryptographic purpose.
- Issue #15184: Ensure consistent results of OS X configuration tailoring for
universal builds by factoring out common OS X-specific customizations from
sysconfig, distutils.sysconfig, distutils.util, and distutils.unixccompiler
into a new module _osx_support.
C API
-----
- Issue #15610: `PyImport_ImportModuleEx()` now uses a 'level' of 0 instead of -1.
- Issue #15169, issue #14599: Strip out the C implementation of
`imp.source_from_cache()` used by PyImport_ExecCodeModuleWithPathnames() and
used the Python code instead. Leads to PyImport_ExecCodeModuleObject() to not
try to infer the source path from the bytecode path as
PyImport_ExecCodeModuleWithPathnames() does.
Extension Modules
-----------------
- Issue #6493: An issue in ctypes on Windows that caused structure bitfields of
type `ctypes.c_uint32` and width 32 to incorrectly be set has been fixed.
- Issue #15194: Update libffi to the 3.0.11 release.
IDLE
----
- Issue #13052: Fix IDLE crashing when replace string in Search/Replace dialog
ended with ``\``. Patch by Roger Serwy.
Tools/Demos
-----------
- Issue #15458: python-config gets a new option --configdir to print the $LIBPL
value.
- Move importlib.test.benchmark to Tools/importbench.
- Issue #12605: The gdb hooks for debugging CPython (within Tools/gdb) have been
enhanced to show information on more C frames relevant to CPython within the
"py-bt" and "py-bt-full" commands:
* C frames that are waiting on the GIL
* C frames that are garbage-collecting
* C frames that are due to the invocation of a PyCFunction
Documentation
-------------
- Issue #15041: Update "see also" list in tkinter documentation.
- Issue #15444: Use proper spelling for non-ASCII contributor names. Patch by
Serhiy Storchaka.
- Issue #15295: Reorganize and rewrite the documentation on the import system.
- Issue #15230: Clearly document some of the limitations of the runpy module and
nudge readers towards importlib when appropriate.
- Issue #15053: Copy Python 3.3 import lock change notice to all relevant
functions in imp instead of just at the top of the relevant section.
- Issue #15288: Link to the term "loader" in notes in pkgutil about how things
won't work as expected in Python 3.3 and mark the requisite functions as
"changed" since they will no longer work with modules directly imported by
import itself.
- Issue #13557: Clarify effect of giving two different namespaces to `exec()` or
`execfile()`.
- Issue #15250: Document that `filecmp.dircmp()` compares files shallowly. Patch
contributed by Chris Jerdonek.
- Issue #15442: Expose the default list of directories ignored by
`filecmp.dircmp()` as a module attribute, and expand the list to more modern
values.
Tests
-----
- Issue #15467: Move helpers for `__sizeof__()` tests into test_support. Patch
by Serhiy Storchaka.
- Issue #15320: Make iterating the list of tests thread-safe when running tests
in multiprocess mode. Patch by Chris Jerdonek.
- Issue #15168: Move `importlib.test` to `test.test_importlib`.
- Issue #15091: Reactivate a test on UNIX which was failing thanks to a
forgotten `importlib.invalidate_caches()` call.
- Issue #15230: Adopted a more systematic approach in the runpy tests.
- Issue #15300: Ensure the temporary test working directories are in the same
parent folder when running tests in multiprocess mode from a Python build.
Patch by Chris Jerdonek.
- Issue #15284: Skip {send,recv}msg tests in test_socket when IPv6 is not
enabled. Patch by Brian Brazil.
- Issue #15277: Fix a resource leak in support.py when IPv6 is disabled. Patch
by Brian Brazil.
Build
-----
- Issue #11715: Fix multiarch detection without having Debian development tools
(dpkg-dev) installed.
- Issue #15037: Build OS X installers with local copy of ncurses 5.9 libraries
to avoid curses.unget_wch bug present in older versions of ncurses such as
those shipped with OS X.
- Issue #15560: Fix building _sqlite3 extension on OS X with an SDK. Also, for
OS X installers, ensure consistent sqlite3 behavior and feature availability
by building a local copy of libsqlite3 rather than depending on the wide range
of versions supplied with various OS X releases.
- Issue #8847: Disable COMDAT folding in Windows PGO builds.
- Issue #14018: Fix OS X Tcl/Tk framework checking when using OS X SDKs.
- Issue #16256: OS X installer now sets correct permissions for doc directory.
- Issue #15431: Add _freeze_importlib project to regenerate importlib.h on
Windows. Patch by Kristján Valur Jónsson.
- Issue #14197: For OS X framework builds, ensure links to the shared library
are created with the proper ABI suffix.
- Issue #14330: For cross builds, don't use host python, use host search paths
for host compiler.
- Issue #15235: Allow Berkley DB versions up to 5.3 to build the dbm module.
- Issue #15268: Search curses.h in /usr/include/ncursesw.
What's New in Python 3.3.0 Beta 1?
==================================
*Release date: 27-Jun-2012*
Core and Builtins
-----------------
- Fix a (most likely) very rare memory leak when calling main() and not being
able to decode a command-line argument.
- Issue #14815: Use Py_ssize_t instead of long for the object hash, to
preserve all 64 bits of hash on Win64.
- Issue #12268: File readline, readlines and read() or readall() methods
no longer lose data when an underlying read system call is interrupted.
IOError is no longer raised due to a read system call returning EINTR
from within these methods.
- Issue #11626: Add _SizeT functions to stable ABI.
- Issue #15142: Fix reference leak when deallocating instances of types
created using PyType_FromSpec().
- Issue #10053: Don't close FDs when FileIO.__init__ fails. Loosely based on
the work by Hirokazu Yamamoto.
- Issue #15096: Removed support for ur'' as the raw notation isn't
compatible with Python 2.x's raw unicode strings.
- Issue #13783: Generator objects now use the identifier APIs internally
- Issue #14874: Restore charmap decoding speed to pre-PEP 393 levels.
Patch by Serhiy Storchaka.
- Issue #15026: utf-16 encoding is now significantly faster (up to 10x).
Patch by Serhiy Storchaka.
- Issue #11022: open() and io.TextIOWrapper are now calling
locale.getpreferredencoding(False) instead of locale.getpreferredencoding()
in text mode if the encoding is not specified. Don't change temporary the
locale encoding using locale.setlocale(), use the current locale encoding
instead of the user preferred encoding.
- Issue #14673: Add Eric Snow's sys.implementation implementation.
- Issue #15038: Optimize python Locks on Windows.
Library
-------
- Issue #12288: Consider '0' and '0.0' as valid initialvalue
for tkinter SimpleDialog.
- Issue #15512: Add a __sizeof__ implementation for parser.
Patch by Serhiy Storchaka.
- Issue #15469: Add a __sizeof__ implementation for deque objects.
Patch by Serhiy Storchaka.
- Issue #15489: Add a __sizeof__ implementation for BytesIO objects.
Patch by Serhiy Storchaka.
- Issue #15487: Add a __sizeof__ implementation for buffered I/O objects.
Patch by Serhiy Storchaka.
- Issue #15514: Correct __sizeof__ support for cpu_set.
Patch by Serhiy Storchaka.
- Issue #15177: Added dir_fd parameter to os.fwalk().
- Issue #15061: Re-implemented hmac.compare_digest() in C to prevent further
timing analysis and to support all buffer protocol aware objects as well as
ASCII only str instances safely.
- Issue #15164: Change return value of platform.uname() from a
plain tuple to a collections.namedtuple.
- Support Mageia Linux in the platform module.
- Issue #11678: Support Arch linux in the platform module.
- Issue #15118: Change return value of os.uname() and os.times() from
plain tuples to immutable iterable objects with named attributes
(structseq objects).
- Speed up _decimal by another 10-15% by caching the thread local context
that was last accessed. In the pi benchmark (64-bit platform, prec=9),
_decimal is now only 1.5x slower than float.
- Remove the packaging module, which is not ready for prime time.
- Issue #15154: Add "dir_fd" parameter to os.rmdir, remove "rmdir"
parameter from os.remove / os.unlink.
- Issue #4489: Add a shutil.rmtree that isn't susceptible to symlink attacks.
It is used automatically on platforms supporting the necessary os.openat()
and os.unlinkat() functions. Main code by Martin von Löwis.
- Issue #15156: HTMLParser now uses the new "html.entities.html5" dictionary.
- Issue #11113: add a new "html5" dictionary containing the named character
references defined by the HTML5 standard and the equivalent Unicode
character(s) to the html.entities module.
- Issue #15114: the strict mode of HTMLParser and the HTMLParseError exception
are deprecated now that the parser is able to parse invalid markup.
- Issue #3665: \u and \U escapes are now supported in unicode regular
expressions. Patch by Serhiy Storchaka.
- Issue #15153: Added inspect.getgeneratorlocals to simplify white box
testing of generator state updates
- Issue #13062: Added inspect.getclosurevars to simplify testing stateful
closures
- Issue #11024: Fixes and additional tests for Time2Internaldate.
- Issue #14626: Large refactoring of functions / parameters in the os module.
Many functions now support "dir_fd" and "follow_symlinks" parameters;
some also support accepting an open file descriptor in place of a path
string. Added os.support_* collections as LBYL helpers. Removed many
functions only previously seen in 3.3 alpha releases (often starting with
"f" or "l", or ending with "at"). Originally suggested by Serhiy Storchaka;
implemented by Larry Hastings.
- Issue #15008: Implement PEP 362 "Signature Objects".
Patch by Yury Selivanov.
- Issue: #15138: base64.urlsafe_{en,de}code() are now 3-4x faster.
- Issue #444582: Add shutil.which, for finding programs on the system path.
Original patch by Erik Demaine, with later iterations by Jan Killian
and Brian Curtin.
- Issue #14837: SSL errors now have ``library`` and ``reason`` attributes
describing precisely what happened and in which OpenSSL submodule. The
str() of a SSLError is also enhanced accordingly.
- Issue #9527: datetime.astimezone() method will now supply a class
timezone instance corresponding to the system local timezone when
called with no arguments.
- Issue #14653: email.utils.mktime_tz() no longer relies on system
mktime() when timezone offest is supplied.
- Issue #14684: zlib.compressobj() and zlib.decompressobj() now support the use
of predefined compression dictionaries. Original patch by Sam Rushing.
- Fix GzipFile's handling of filenames given as bytes objects.
- Issue #14772: Return destination values from some shutil functions.
- Issue #15064: Implement context manager protocol for multiprocessing types
- Issue #15101: Make pool finalizer avoid joining current thread.
- Issue #14657: The frozen instance of importlib used for bootstrap is now
also the module imported as importlib._bootstrap.
- Issue #14055: Add __sizeof__ support to _elementtree.
- Issue #15054: A bug in tokenize.tokenize that caused string literals
with 'b' prefixes to be incorrectly tokenized has been fixed.
Patch by Serhiy Storchaka.
- Issue #15006: Allow equality comparison between naive and aware
time or datetime objects.
- Issue #15036: Mailbox no longer throws an error if a flush is done
between operations when removing or changing multiple items in mbox,
MMDF, or Babyl mailboxes.
- Issue #14059: Implement multiprocessing.Barrier.
- Issue #15061: The inappropriately named hmac.secure_compare has been
renamed to hmac.compare_digest, restricted to operating on bytes inputs
only and had its documentation updated to more accurately reflect both its
intent and its limitations
- Issue #13841: Make child processes exit using sys.exit() on Windows.
- Issue #14936: curses_panel was converted to PEP 3121 and PEP 384 API.
Patch by Robin Schreiber.
- Issue #1667546: On platforms supporting tm_zone and tm_gmtoff fields
in struct tm, time.struct_time objects returned by time.gmtime(),
time.localtime() and time.strptime() functions now have tm_zone and
tm_gmtoff attributes. Original patch by Paul Boddie.
- Rename adjusted attribute to adjustable in time.get_clock_info() result.
- Issue #3518: Remove references to non-existent BaseManager.from_address()
method.
- Issue #13857: Added textwrap.indent() function (initial patch by Ezra
Berch)
- Issue #2736: Added datetime.timestamp() method.
- Issue #13854: Make multiprocessing properly handle non-integer
non-string argument to SystemExit.
- Issue #12157: Make pool.map() empty iterables correctly. Initial
patch by mouad.
- Issue #11823: disassembly now shows argument counts on calls with keyword args.
- Issue #14711: os.stat_float_times() has been deprecated.
- LZMAFile now accepts the modes "rb"/"wb"/"ab" as synonyms of "r"/"w"/"a".
- The bz2 and lzma modules now each contain an open() function, allowing
compressed files to readily be opened in text mode as well as binary mode.
- BZ2File.__init__() and LZMAFile.__init__() now accept a file object as their
first argument, rather than requiring a separate "fileobj" argument.
- gzip.open() now accepts file objects as well as filenames.
- Issue #14992: os.makedirs(path, exist_ok=True) would raise an OSError
when the path existed and had the S_ISGID mode bit set when it was
not explicitly asked for. This is no longer an exception as mkdir
cannot control if the OS sets that bit for it or not.
- Issue #14989: Make the CGI enable option to http.server available via command
line.
- Issue #14987: Add a missing import statement to inspect.
- Issue #1079: email.header.decode_header now correctly parses all the examples
in RFC2047. There is a necessary visible behavior change: the leading and/or
trailing whitespace on ASCII parts is now preserved.
- Issue #14969: Better handling of exception chaining in contextlib.ExitStack
- Issue #14963: Convert contextlib.ExitStack.__exit__ to use an iterative
algorithm (Patch by Alon Horev)
- Issue #14785: Add sys._debugmallocstats() to help debug low-level memory
allocation issues
- Issue #14443: Ensure that .py files are byte-compiled with the correct Python
executable within bdist_rpm even on older versions of RPM
C-API
-----
- Issue #15146: Add PyType_FromSpecWithBases. Patch by Robin Schreiber.
- Issue #15042: Add PyState_AddModule and PyState_RemoveModule. Add version
guard for Py_LIMITED_API additions. Patch by Robin Schreiber.
- Issue #13783: Inadvertent additions to the public C API in the PEP 380
implementation have either been removed or marked as private interfaces.
Extension Modules
-----------------
- Issue #15000: Support the "unique" x32 architecture in _posixsubprocess.c.
IDLE
----
- Issue #9803: Don't close IDLE on saving if breakpoint is open.
Patch by Roger Serwy.
- Issue #14962: Update text coloring in IDLE shell window after changing
options. Patch by Roger Serwy.
Documentation
-------------
- Issue #15176: Clarified behavior, documentation, and implementation
of os.listdir().
- Issue #14982: Document that pkgutil's iteration functions require the
non-standard iter_modules() method to be defined by an importer (something
the importlib importers do not define).
- Issue #15081: Document PyState_FindModule.
Patch by Robin Schreiber.
- Issue #14814: Added first draft of ipaddress module API reference
Tests
-----
- Issue #15187: Bugfix: remove temporary directories test_shutil was leaving
behind.
- Issue #14769: test_capi now has SkipitemTest, which cleverly checks
for "parity" between PyArg_ParseTuple() and the Python/getargs.c static
function skipitem() for all possible "format units".
- test_nntplib now tolerates being run from behind NNTP gateways that add
"X-Antivirus" headers to articles
- Issue #15043: test_gdb is now skipped entirely if gdb security settings
block loading of the gdb hooks
- Issue #14963: Add test cases for exception handling behaviour
in contextlib.ExitStack (Initial patch by Alon Horev)
Build
-----
- Issue #13590: Improve support for OS X Xcode 4:
* Try to avoid building Python or extension modules with problematic
llvm-gcc compiler.
* Since Xcode 4 removes ppc support, extension module builds now
check for ppc compiler support and automatically remove ppc and
ppc64 archs when not available.
* Since Xcode 4 no longer install SDKs in default locations,
extension module builds now revert to using installed headers
and libs if the SDK used to build the interpreter is not
available.
* Update ./configure to use better defaults for universal builds;
in particular, --enable-universalsdk=yes uses the Xcode default
SDK and --with-universal-archs now defaults to "intel" if ppc
not available.
- Issue #14225: Fix Unicode support for curses (#12567) on OS X
- Issue #14928: Fix importlib bootstrap issues by using a custom executable
(Modules/_freeze_importlib) to build Python/importlib.h.
What's New in Python 3.3.0 Alpha 4?
===================================
*Release date: 31-May-2012*
Core and Builtins
-----------------
- Issue #14835: Make plistlib output empty arrays & dicts like OS X.
Patch by Sidney San Martín.
- Issue #14744: Use the new _PyUnicodeWriter internal API to speed up
str%args and str.format(args).
- Issue #14930: Make memoryview objects weakrefable.
- Issue #14775: Fix a potential quadratic dict build-up due to the garbage
collector repeatedly trying to untrack dicts.
- Issue #14857: fix regression in references to PEP 3135 implicit __class__
closure variable (Reopens issue #12370)
- Issue #14712 (PEP 405): Virtual environments. Implemented by Vinay Sajip.
- Issue #14660 (PEP 420): Namespace packages. Implemented by Eric Smith.
- Issue #14494: Fix __future__.py and its documentation to note that
absolute imports are the default behavior in 3.0 instead of 2.7.
Patch by Sven Marnach.
- Issue #9260: A finer-grained import lock. Most of the import sequence
now uses per-module locks rather than the global import lock, eliminating
well-known issues with threads and imports.
- Issue #14624: UTF-16 decoding is now 3x to 4x faster on various inputs.
Patch by Serhiy Storchaka.
- asdl_seq and asdl_int_seq are now Py_ssize_t sized.
- Issue #14133 (PEP 415): Implement suppression of __context__ display with an
attribute on BaseException. This replaces the original mechanism of PEP 409.
- Issue #14417: Mutating a dict during lookup now restarts the lookup instead
of raising a RuntimeError (undoes issue #14205).
- Issue #14738: Speed-up UTF-8 decoding on non-ASCII data. Patch by Serhiy
Storchaka.
- Issue #14700: Fix two broken and undefined-behaviour-inducing overflow checks
in old-style string formatting.
Library
-------
- Issue #14690: Use monotonic clock instead of system clock in the sched,
subprocess and trace modules.
- Issue #14443: Tell rpmbuild to use the correct version of Python in
bdist_rpm. Initial patch by Ross Lagerwall.
- Issue #12515: email now registers a defect if it gets to EOF while parsing
a MIME part without seeing the closing MIME boundary.
- Issue #1672568: email now always decodes base64 payloads, adding padding and
ignoring non-base64-alphabet characters if needed, and registering defects
for any such problems.
- Issue #14925: email now registers a defect when the parser decides that there
is a missing header/body separator line. MalformedHeaderDefect, which the
existing code would never actually generate, is deprecated.
- Issue #10365: File open dialog now works instead of crashing even when
the parent window is closed before the dialog. Patch by Roger Serwy.
- Issue #8739: Updated smtpd to support RFC 5321, and added support for the
RFC 1870 SIZE extension.
- Issue #665194: Added a localtime function to email.utils to provide an
aware local datetime for use in setting Date headers.
- Issue #12586: Added new provisional policies that implement convenient
unicode support for email headers. See What's New for details.
- Issue #14731: Refactored email Policy framework to support full backward
compatibility with Python 3.2 by default yet allow for the introduction of
new features through new policies. Note that Policy.must_be_7bit is renamed
to cte_type.
- Issue #14876: Use user-selected font for highlight configuration.
- Issue #14920: Fix the help(urllib.parse) failure on locale C on terminals.
Have ascii characters in help.
- Issue #14548: Make multiprocessing finalizers check pid before
running to cope with possibility of gc running just after fork.
- Issue #14036: Add an additional check to validate that port in urlparse does
not go in illegal range and returns None.
- Issue #14862: Add missing names to os.__all__
- Issue #14875: Use float('inf') instead of float('1e66666') in the json module.
- Issue #13585: Added contextlib.ExitStack
- PEP 3144, Issue #14814: Added the ipaddress module
- Issue #14426: Correct the Date format in Expires attribute of Set-Cookie
Header in Cookie.py.
- Issue #14588: The types module now provide new_class() and prepare_class()
functions to support PEP 3115 compliant dynamic class creation. Patch by
Daniel Urban and Nick Coghlan.
- Issue #13152: Allow to specify a custom tabsize for expanding tabs in
textwrap. Patch by John Feuerstein.
- Issue #14721: Send the correct 'Content-length: 0' header when the body is an
empty string ''. Initial Patch contributed by Arve Knudsen.
- Issue #14072: Fix parsing of 'tel' URIs in urlparse by making the check for
ports stricter.
- Issue #9374: Generic parsing of query and fragment portions of url for any
scheme. Supported both by RFC3986 and RFC2396.
- Issue #14798: Fix the functions in pyclbr to raise an ImportError
when the first part of a dotted name is not a package. Patch by
Xavier de Gaye.
- Issue #12098: multiprocessing on Windows now starts child processes
using the same sys.flags as the current process. Initial patch by
Sergey Mezentsev.
- Issue #13031: Small speed-up for tarfile when unzipping tarfiles.
Patch by Justin Peel.
- Issue #14780: urllib.request.urlopen() now has a ``cadefault`` argument
to use the default certificate store. Initial patch by James Oakley.
- Issue #14829: Fix bisect and range() indexing with large indices
(>= 2 ** 32) under 64-bit Windows.
- Issue #14732: The _csv module now uses PEP 3121 module initialization.
Patch by Robin Schreiber.
- Issue #14809: Add HTTP status codes introduced by RFC 6585 to http.server
and http.client. Patch by EungJun Yi.
- Issue #14777: tkinter may return undecoded UTF-8 bytes as a string when
accessing the Tk clipboard. Modify clipboad_get() to first request type
UTF8_STRING when no specific type is requested in an X11 windowing
environment, falling back to the current default type STRING if that fails.
Original patch by Thomas Kluyver.
- Issue #14773: Fix os.fwalk() failing on dangling symlinks.
- Issue #12541: Be lenient with quotes around Realm field of HTTP Basic
Authentation in urllib2.
- Issue #14807: move undocumented tarfile.filemode() to stat.filemode() and add
doc entry. Add tarfile.filemode alias with deprecation warning.
- Issue #13815: TarFile.extractfile() now returns io.BufferedReader objects.
- Issue #14532: Add a secure_compare() helper to the hmac module, to mitigate
timing attacks. Patch by Jon Oberheide.
- Add importlib.util.resolve_name().
- Issue #14366: Support lzma compression in zip files.
Patch by Serhiy Storchaka.
- Issue #13959: Introduce importlib.find_loader() and document
imp.find_module/load_module as deprecated.
- Issue #14082: shutil.copy2() now copies extended attributes, if possible.
Patch by Hynek Schlawack.
- Issue #13959: Make importlib.abc.FileLoader.load_module()/get_filename() and
importlib.machinery.ExtensionFileLoader.load_module() have their single
argument be optional. Allows for the replacement (and thus deprecation) of
imp.load_source()/load_package()/load_compiled().
- Issue #13959: imp.get_suffixes() has been deprecated in favour of the new
attributes on importlib.machinery: SOURCE_SUFFIXES, DEBUG_BYTECODE_SUFFIXES,
OPTIMIZED_BYTECODE_SUFFIXES, BYTECODE_SUFFIXES, and EXTENSION_SUFFIXES. This
led to an indirect deprecation of inspect.getmoduleinfo().
- Issue #14662: Prevent shutil failures on OS X when destination does not
support chflag operations. Patch by Hynek Schlawack.
- Issue #14157: Fix time.strptime failing without a year on February 29th.
Patch by Hynek Schlawack.
- Issue #14753: Make multiprocessing's handling of negative timeouts
the same as it was in Python 3.2.
- Issue #14583: Fix importlib bug when a package's __init__.py would first
import one of its modules then raise an error.
- Issue #14741: Fix missing support for Ellipsis ('...') in parser module.
- Issue #14697: Fix missing support for set displays and set comprehensions in
parser module.
- Issue #14701: Fix missing support for 'raise ... from' in parser module.
- Add support for timeouts to the acquire() methods of
multiprocessing's lock/semaphore/condition proxies.
- Issue #13989: Add support for text mode to gzip.open().
- Issue #14127: The os.stat() result object now provides three additional
fields: st_ctime_ns, st_mtime_ns, and st_atime_ns, providing those times as an
integer with nanosecond resolution. The functions os.utime(), os.lutimes(),
and os.futimes() now accept a new parameter, ns, which accepts mtime and atime
as integers with nanosecond resolution.
- Issue #14127 and #10148: shutil.copystat now preserves exact mtime and atime
on filesystems providing nanosecond resolution.
IDLE
----
- Issue #14958: Change IDLE systax highlighting to recognize all string and
byte literals supported in Python 3.3.
- Issue #10997: Prevent a duplicate entry in IDLE's "Recent Files" menu.
- Issue #14929: Stop IDLE 3.x from closing on Unicode decode errors when
grepping. Patch by Roger Serwy.
- Issue #12510: Attempting to get invalid tooltip no longer closes IDLE.
Other tooltipss have been corrected or improved and the number of tests
has been tripled. Original patch by Roger Serwy.
Tools/Demos
-----------
- Issue #14695: Bring Tools/parser/unparse.py support up to date with
the Python 3.3 Grammar.
Build
-----
- Issue #14472: Update .gitignore. Patch by Matej Cepl.
- Upgrade Windows library versions: bzip 1.0.6, OpenSSL 1.0.1c.
- Issue #14693: Under non-Windows platforms, hashlib's fallback modules are
always compiled, even if OpenSSL is present at build time.
- Issue #13210: Windows build now uses VS2010, ported from VS2008.
C-API
-----
- Issue #14705: The PyArg_Parse() family of functions now support the 'p' format
unit, which accepts a "boolean predicate" argument. It converts any Python
value into an integer--0 if it is "false", and 1 otherwise.
Documentation
-------------
- Issue #14863: Update the documentation of os.fdopen() to reflect the
fact that it's only a thin wrapper around open() anymore.
- Issue #14588: The language reference now accurately documents the Python 3
class definition process. Patch by Nick Coghlan.
- Issue #14943: Correct a default argument value for winreg.OpenKey
and correctly list the argument names in the function's explanation.
What's New in Python 3.3.0 Alpha 3?
===================================
*Release date: 01-May-2012*
Core and Builtins
-----------------
- Issue #14699: Fix calling the classmethod descriptor directly.
- Issue #14433: Prevent msvcrt crash in interactive prompt when stdin is closed.
- Issue #14521: Make result of float('nan') and float('-nan') more consistent
across platforms.
- Issue #14646: __import__() sets __loader__ if the loader did not.
- Issue #14605: No longer have implicit entries in sys.meta_path. If
sys.meta_path is found to be empty, raise ImportWarning.
- Issue #14605: No longer have implicit entries in sys.path_hooks. If
sys.path_hooks is found to be empty, a warning will be raised. None is now
inserted into sys.path_importer_cache if no finder was discovered. This also
means imp.NullImporter is no longer implicitly used.
- Issue #13903: Implement PEP 412. Individual dictionary instances can now share
their keys with other dictionaries. Classes take advantage of this to share
their instance dictionary keys for improved memory and performance.
- Issue #11603 (again): Setting __repr__ to __str__ now raises a RuntimeError
when repr() or str() is called on such an object.
- Issue #14658: Fix binding a special method to a builtin implementation of a
special method with a different name.
- Issue #14630: Fix a memory access bug for instances of a subclass of int
with value 0.
- Issue #14339: Speed improvements to bin, oct and hex functions. Patch by
Serhiy Storchaka.
- Issue #14385: It is now possible to use a custom type for the __builtins__
namespace, instead of a dict. It can be used for sandboxing for example.
Raise also a NameError instead of ImportError if __build_class__ name if not
found in __builtins__.
- Issue #12599: Be more strict in accepting None compared to a false-like
object for importlib.util.module_for_loader and
importlib.machinery.PathFinder.
- Issue #14612: Fix jumping around with blocks by setting f_lineno.
- Issue #14592: Attempting a relative import w/o __package__ or __name__ set in
globals raises a KeyError.
- Issue #14607: Fix keyword-only arguments which started with ``__``.
- Issue #10854: The ImportError raised when an extension module on Windows
fails to import now uses the new path and name attributes from
Issue #1559549.
- Issue #13889: Check and (if necessary) set FPU control word before calling
any of the dtoa.c string <-> float conversion functions, on MSVC builds of
Python. This fixes issues when embedding Python in a Delphi app.
- __import__() now matches PEP 328 and documentation by defaulting 'index' to 0
instead of -1 and removing support for negative values.
- Issue #2377: Make importlib the implementation of __import__().
- Issue #1559549: ImportError now has 'name' and 'path' attributes that are set
using keyword arguments to its constructor. They are currently not set by
import as they are meant for use by importlib.
- Issue #14474: Save and restore exception state in thread.start_new_thread()
while writing error message if the thread leaves a unhandled exception.
- Issue #13019: Fix potential reference leaks in bytearray.extend(). Patch
by Suman Saha.
Library
-------
- Issue #14768: os.path.expanduser('~/a') doesn't works correctly when HOME is '/'.
- Issue #14371: Support bzip2 in zipfile module. Patch by Serhiy Storchaka.
- Issue #13183: Fix pdb skipping frames after hitting a breakpoint and running
step. Patch by Xavier de Gaye.
- Issue #14696: Fix parser module to understand 'nonlocal' declarations.
- Issue #10941: Fix imaplib.Internaldate2tuple to produce correct result near
the DST transition. Patch by Joe Peterson.
- Issue #9154: Fix parser module to understand function annotations.
- Issue #6085: In http.server.py SimpleHTTPServer.address_string returns the
client ip address instead client hostname. Patch by Charles-François Natali.
- Issue #14309: Deprecate time.clock(), use time.perf_counter() or
time.process_time() instead.
- Issue #14428: Implement the PEP 418. Add time.get_clock_info(),
time.perf_counter() and time.process_time() functions, and rename
time.steady() to time.monotonic().
- Issue #14646: importlib.util.module_for_loader() now sets __loader__ and
__package__ (when possible).
- Issue #14664: It is now possible to use @unittest.skip{If,Unless} on a
test class that doesn't inherit from TestCase (i.e. a mixin).
- Issue #4892: multiprocessing Connections can now be transferred over
multiprocessing Connections. Patch by Richard Oudkerk (sbt).
- Issue #14160: TarFile.extractfile() failed to resolve symbolic links when
the links were not located in an archive subdirectory.
- Issue #14638: pydoc now treats non-string __name__ values as if they
were missing, instead of raising an error.
- Issue #13684: Fix httplib tunnel issue of infinite loops for certain sites
which send EOF without trailing \r\n.
- Issue #14605: Add importlib.abc.FileLoader, importlib.machinery.(FileFinder,
SourceFileLoader, SourcelessFileLoader, ExtensionFileLoader).
- Issue #13959: imp.cache_from_source()/source_from_cache() now follow
os.path.join()/split() semantics for path manipulation instead of its prior,
custom semantics of caring the right-most path separator forward in path
joining.
- Issue #2193: Allow ":" character in Cookie NAME values.
- Issue #14629: tokenizer.detect_encoding will specify the filename in the
SyntaxError exception if found at readline.__self__.name.
- Issue #14629: Raise SyntaxError in tokenizer.detect_encoding if the
first two lines have non-UTF-8 characters without an encoding declaration.
- Issue #14308: Fix an exception when a "dummy" thread is in the threading
module's active list after a fork().
- Issue #11750: The Windows API functions scattered in the _subprocess and
_multiprocessing.win32 modules now live in a single module "_winapi".
Patch by sbt.
- Issue #14087: multiprocessing: add Condition.wait_for(). Patch by sbt.
- Issue #14538: HTMLParser can now parse correctly start tags that contain
a bare '/'.
- Issue #14452: SysLogHandler no longer inserts a UTF-8 BOM into the message.
- Issue #14386: Expose the dict_proxy internal type as types.MappingProxyType.
- Issue #13959: Make imp.reload() always use a module's __loader__ to perform
the reload.
- Issue #13959: Add imp.py and rename the built-in module to _imp, allowing for
re-implementing parts of the module in pure Python.
- Issue #13496: Fix potential overflow in bisect.bisect algorithm when applied
to a collection of size > sys.maxsize / 2.
- Have importlib take advantage of ImportError's new 'name' and 'path'
attributes.
- Issue #14399: zipfile now recognizes that the archive has been modified even
if only the comment is changed. In addition, the TypeError that results from
trying to set a non-binary value as a comment is now raised at the time
the comment is set rather than at the time the zipfile is written.
- trace.CoverageResults.is_ignored_filename() now ignores any name that starts
with "<" and ends with ">" instead of special-casing "<string>" and
"<doctest ".
- Issue #12537: The mailbox module no longer depends on knowledge of internal
implementation details of the email package Message object.
- Issue #7978: socketserver now restarts the select() call when EINTR is
returned. This avoids crashing the server loop when a signal is received.
Patch by Jerzy Kozera.
- Issue #14522: Avoid duplicating socket handles in multiprocessing.connection.
Patch by sbt.
- Don't Py_DECREF NULL variable in io.IncrementalNewlineDecoder.
- Issue #3033: Add displayof parameter to tkinter font. Patch by Guilherme Polo.
- Issue #14482: Raise a ValueError, not a NameError, when trying to create
a multiprocessing Client or Listener with an AF_UNIX type address under
Windows. Patch by Popa Claudiu.
- Issue #802310: Generate always unique tkinter font names if not directly passed.
- Issue #14151: Raise a ValueError, not a NameError, when trying to create
a multiprocessing Client or Listener with an AF_PIPE type address under
non-Windows platforms. Patch by Popa Claudiu.
- Issue #14493: Use gvfs-open or xdg-open in webbrowser.
Build
-----
- "make touch" will now touch generated files that are checked into Mercurial,
after a "hg update" which failed to bring the timestamps into the right order.
Tests
-----
- Issue #14026: In test_cmd_line_script, check that sys.argv is populated
correctly for the various invocation approaches (Patch by Jason Yeo)
- Issue #14032: Fix incorrect variable name in test_cmd_line_script debugging
message (Patch by Jason Yeo)
- Issue #14589: Update certificate chain for sha256.tbs-internet.com, fixing
a test failure in test_ssl.
- Issue #14355: Regrtest now supports the standard unittest test loading, and
will use it if a test file contains no `test_main` method.
IDLE
----
- Issue #8515: Set __file__ when run file in IDLE.
Initial patch by Bruce Frederiksen.
- Issue #14496: Fix wrong name in idlelib/tabbedpages.py.
Patch by Popa Claudiu.
Tools / Demos
-------------
- Issue #3561: The Windows installer now has an option, off by default, for
placing the Python installation into the system "Path" environment variable.
- Issue #13165: stringbench is now available in the Tools/stringbench folder.
It used to live in its own SVN project.
C-API
-----
- Issue #14098: New functions PyErr_GetExcInfo and PyErr_SetExcInfo.
Patch by Stefan Behnel.
What's New in Python 3.3.0 Alpha 2?
===================================
*Release date: 01-Apr-2012*
Core and Builtins
-----------------
- Issue #1683368: object.__new__ and object.__init__ raise a TypeError if they
are passed arguments and their complementary method is not overridden.
- Issue #14378: Fix compiling ast.ImportFrom nodes with a "__future__" string as
the module name that was not interned.
- Issue #14331: Use significantly less stack space when importing modules by
allocating path buffers on the heap instead of the stack.
- Issue #14334: Prevent in a segfault in type.__getattribute__ when it was not
passed strings.
- Issue #1469629: Allow cycles through an object's __dict__ slot to be
collected. (For example if ``x.__dict__ is x``).
- Issue #14205: dict lookup raises a RuntimeError if the dict is modified
during a lookup.
- Issue #14220: When a generator is delegating to another iterator with the
yield from syntax, it needs to have its ``gi_running`` flag set to True.
- Issue #14435: Remove dedicated block allocator from floatobject.c and rely
on the PyObject_Malloc() api like all other objects.
- Issue #14471: Fix a possible buffer overrun in the winreg module.
- Issue #14288: Allow the serialization of builtin iterators
Library
-------
- Issue #14300: Under Windows, sockets created using socket.dup() now allow
overlapped I/O. Patch by sbt.
- Issue #13872: socket.detach() now marks the socket closed (as mirrored
in the socket repr()). Patch by Matt Joiner.
- Issue #14406: Fix a race condition when using ``concurrent.futures.wait(
return_when=ALL_COMPLETED)``. Patch by Matt Joiner.
- Issue #5136: deprecate old, unused functions from tkinter.
- Issue #14416: syslog now defines the LOG_ODELAY and LOG_AUTHPRIV constants
if they are defined in <syslog.h>.
- Issue #14295: Add unittest.mock
- Issue #7652: Add --with-system-libmpdec option to configure for linking
the _decimal module against an installed libmpdec.
- Issue #14380: MIMEText now defaults to utf-8 when passed non-ASCII unicode
with no charset specified.
- Issue #10340: asyncore - properly handle EINVAL in dispatcher constructor on
OSX; avoid to call handle_connect in case of a disconnected socket which
was not meant to connect.
- Issue #14204: The ssl module now has support for the Next Protocol
Negotiation extension, if available in the underlying OpenSSL library.
Patch by Colin Marc.
- Issue #3035: Unused functions from tkinter are marked as pending deprecated.
- Issue #12757: Fix the skipping of doctests when python is run with -OO so
that it works in unittest's verbose mode as well as non-verbose mode.
- Issue #7652: Integrate the decimal floating point libmpdec library to speed
up the decimal module. Performance gains of the new C implementation are
between 10x and 100x, depending on the application.
- Issue #14269: SMTPD now conforms to the RFC and requires a HELO command
before MAIL, RCPT, or DATA.
- Issue #13694: asynchronous connect in asyncore.dispatcher does not set addr
attribute.
- Issue #14344: fixed the repr of email.policy objects.
- Issue #11686: Added missing entries to email package __all__ lists
(mostly the new Bytes classes).
- Issue #14335: multiprocessing's custom Pickler subclass now inherits from
the C-accelerated implementation. Patch by sbt.
- Issue #10484: Fix the CGIHTTPServer's PATH_INFO handling problem.
- Issue #11199: Fix the with urllib which hangs on particular ftp urls.
- Improve the memory utilization and speed of functools.lru_cache.
- Issue #14222: Use the new time.steady() function instead of time.time() for
timeout in queue and threading modules to not be affected of system time
update.
- Issue #13248: Remove lib2to3.pytree.Base.get_prefix/set_prefix.
- Issue #14234: CVE-2012-0876: Randomize hashes of xml attributes in the hash
table internal to the pyexpat module's copy of the expat library to avoid a
denial of service due to hash collisions. Patch by David Malcolm with some
modifications by the expat project.
- Issue #12818: format address no longer needlessly \ escapes ()s in names when
the name ends up being quoted.
- Issue #14062: BytesGenerator now correctly folds Header objects,
including using linesep when folding.
- Issue #13839: When invoked on the command-line, the pstats module now
accepts several filenames of profile stat files and merges them all.
Patch by Matt Joiner.
- Issue #14291: Email now defaults to utf-8 for non-ASCII unicode headers
instead of raising an error. This fixes a regression relative to 2.7.
- Issue #989712: Support using Tk without a mainloop.
- Issue #3835: Refuse to use unthreaded Tcl in threaded Python.
- Issue #2843: Add new Tk API to Tkinter.
- Issue #14184: Increase the default stack size for secondary threads on
Mac OS X to avoid interpreter crashes when using threads on 10.7.
- Issue #14180: datetime.date.fromtimestamp(),
datetime.datetime.fromtimestamp() and datetime.datetime.utcfromtimestamp()
now raise an OSError instead of ValueError if localtime() or gmtime() failed.
- Issue #14180: time.ctime(), gmtime(), time.localtime(),
datetime.date.fromtimestamp(), datetime.datetime.fromtimestamp() and
datetime.datetime.utcfromtimestamp() now raises an OverflowError, instead of
a ValueError, if the timestamp does not fit in time_t.
- Issue #14180: datetime.datetime.fromtimestamp() and
datetime.datetime.utcfromtimestamp() now round microseconds towards zero
instead of rounding to nearest with ties going away from zero.
- Issue #10543: Fix unittest test discovery with Jython bytecode files.
- Issue #1178863: Separate initialisation from setting when initializing
Tkinter.Variables; harmonize exceptions to ValueError; only delete variables
that have not been deleted; assert that variable names are strings.
- Issue #14104: Implement time.monotonic() on Mac OS X, patch written by
Nicholas Riley.
- Issue #13394: the aifc module now uses warnings.warn() to signal warnings.
- Issue #14252: Fix subprocess.Popen.terminate() to not raise an error under
Windows when the child process has already exited.
- Issue #14223: curses.addch() is no more limited to the range 0-255 when the
Python curses is not linked to libncursesw. It was a regression introduced
in Python 3.3a1.
- Issue #14168: Check for presence of Element._attrs in minidom before
accessing it.
- Issue #12328: Fix multiprocessing's use of overlapped I/O on Windows.
Also, add a multiprocessing.connection.wait(rlist, timeout=None) function
for polling multiple objects at once. Patch by sbt.
- Issue #14007: Accept incomplete TreeBuilder objects (missing start, end,
data or close method) for the Python implementation as well.
Drop the no-op TreeBuilder().xml() method from the C implementation.
- Issue #14210: pdb now has tab-completion not only for command names, but
also for their arguments, wherever possible.
- Issue #14310: Sockets can now be with other processes on Windows using
the api socket.socket.share() and socket.fromshare().
- Issue #10576: The gc module now has a 'callbacks' member that will get
called when garbage collection takes place.
Build
-----
- Issue #14557: Fix extensions build on HP-UX. Patch by Adi Roiban.
- Issue #14387: Do not include accu.h from Python.h.
- Issue #14359: Only use O_CLOEXEC in _posixmodule.c if it is defined.
Based on patch from Hervé Coatanhay.
- Issue #14321: Do not run pgen during the build if files are up to date.
Documentation
-------------
- Issue #14034: added the argparse tutorial.
- Issue #14324: Fix configure tests for cross builds.
- Issue #14327: Call AC_CANONICAL_HOST in configure.ac and check in
config.{guess,sub}. Don't use uname calls for cross builds.
Extension Modules
-----------------
- Issue #9041: An issue in ctypes.c_longdouble, ctypes.c_double, and
ctypes.c_float that caused an incorrect exception to be returned in the
case of overflow has been fixed.
- Issue #14212: The re module didn't retain a reference to buffers it was
scanning, resulting in segfaults.
- Issue #14259: The finditer() method of re objects did not take any
keyword arguments, contrary to the documentation.
- Issue #10142: Support for SEEK_HOLE/SEEK_DATA (for example, under ZFS).
Tests
-----
- Issue #14442: Add missing errno import in test_smtplib.
- Issue #8315: (partial fix) python -m unittest test.test_email now works.
What's New in Python 3.3.0 Alpha 1?
===================================
*Release date: 05-Mar-2012*
Core and Builtins
-----------------
- Issue #14172: Fix reference leak when marshalling a buffer-like object
(other than a bytes object).
- Issue #13521: dict.setdefault() now does only one lookup for the given key,
making it "atomic" for many purposes. Patch by Filip Gruszczyński.
- PEP 409, Issue #6210: "raise X from None" is now supported as a means of
suppressing the display of the chained exception context. The chained
context still remains available as the __context__ attribute.
- Issue #10181: New memoryview implementation fixes multiple ownership
and lifetime issues of dynamically allocated Py_buffer members (#9990)
as well as crashes (#8305, #7433). Many new features have been added
(See whatsnew/3.3), and the documentation has been updated extensively.
The ndarray test object from _testbuffer.c implements all aspects of
PEP-3118, so further development towards the complete implementation
of the PEP can proceed in a test-driven manner.
Thanks to Nick Coghlan, Antoine Pitrou and Pauli Virtanen for review
and many ideas.
- Issue #12834: Fix incorrect results of memoryview.tobytes() for
non-contiguous arrays.
- Issue #5231: Introduce memoryview.cast() method that allows changing
format and shape without making a copy of the underlying memory.
- Issue #14084: Fix a file descriptor leak when importing a module with a
bad encoding.
- Upgrade Unicode data to Unicode 6.1.
- Issue #14040: Remove rarely used file name suffixes for C extensions
(under POSIX mainly).
- Issue #14051: Allow arbitrary attributes to be set of classmethod and
staticmethod.
- Issue #13703: oCERT-2011-003: Randomize hashes of str and bytes to protect
against denial of service attacks due to hash collisions within the dict and
set types. Patch by David Malcolm, based on work by Victor Stinner.
- Issue #13020: Fix a reference leak when allocating a structsequence object
fails. Patch by Suman Saha.
- Issue #13908: Ready types returned from PyType_FromSpec.
- Issue #11235: Fix OverflowError when trying to import a source file whose
modification time doesn't fit in a 32-bit timestamp.
- Issue #12705: A SyntaxError exception is now raised when attempting to
compile multiple statements as a single interactive statement.
- Fix the builtin module initialization code to store the init function for
future reinitialization.
- Issue #8052: The posix subprocess module would take a long time closing
all possible file descriptors in the child process rather than just open
file descriptors. It now closes only the open fds if possible for the
default close_fds=True behavior.
- Issue #13629: Renumber the tokens in token.h so that they match the indexes
into _PyParser_TokenNames.
- Issue #13752: Add a casefold() method to str.
- Issue #13761: Add a "flush" keyword argument to the print() function,
used to ensure flushing the output stream.
- Issue #13645: pyc files now contain the size of the corresponding source
code, to avoid timestamp collisions (especially on filesystems with a low
timestamp resolution) when checking for freshness of the bytecode.
- PEP 380, Issue #11682: Add "yield from <x>" to support easy delegation to
subgenerators (initial patch by Greg Ewing, integration into 3.3 by
Renaud Blanch, Ryan Kelly, Zbigniew Jędrzejewski-Szmek and Nick Coghlan)
- Issue #13748: Raw bytes literals can now be written with the ``rb`` prefix
as well as ``br``.
- Issue #12736: Use full unicode case mappings for upper, lower, and title case.
- Issue #12760: Add a create mode to open(). Patch by David Townshend.
- Issue #13738: Simplify implementation of bytes.lower() and bytes.upper().
- Issue #13577: Built-in methods and functions now have a __qualname__.
Patch by sbt.
- Issue #6695: Full garbage collection runs now clear the freelist of set
objects. Initial patch by Matthias Troffaes.
- Fix OSError.__init__ and OSError.__new__ so that each of them can be
overriden and take additional arguments (followup to issue #12555).
- Fix the fix for issue #12149: it was incorrect, although it had the side
effect of appearing to resolve the issue. Thanks to Mark Shannon for
noticing.
- Issue #13505: Pickle bytes objects in a way that is compatible with
Python 2 when using protocols <= 2.
- Issue #11147: Fix an unused argument in _Py_ANNOTATE_MEMORY_ORDER. (Fix
given by Campbell Barton).
- Issue #13503: Use a more efficient reduction format for bytearrays with
pickle protocol >= 3. The old reduction format is kept with older protocols
in order to allow unpickling under Python 2. Patch by Irmen de Jong.
- Issue #7111: Python can now be run without a stdin, stdout or stderr
stream. It was already the case with Python 2. However, the corresponding
sys module entries are now set to None (instead of an unusable file object).
- Issue #11849: Ensure that free()d memory arenas are really released
on POSIX systems supporting anonymous memory mappings. Patch by
Charles-François Natali.
- PEP 3155 / issue #13448: Qualified name for classes and functions.
- Issue #13436: Fix a bogus error message when an AST object was passed
an invalid integer value.
- Issue #13411: memoryview objects are now hashable when the underlying
object is hashable.
- Issue #13338: Handle all enumerations in _Py_ANNOTATE_MEMORY_ORDER
to allow compiling extension modules with -Wswitch-enum on gcc.
Initial patch by Floris Bruynooghe.
- Issue #10227: Add an allocation cache for a single slice object. Patch by
Stefan Behnel.
- Issue #13393: BufferedReader.read1() now asks the full requested size to
the raw stream instead of limiting itself to the buffer size.
- Issue #13392: Writing a pyc file should now be atomic under Windows as well.
- Issue #13333: The UTF-7 decoder now accepts lone surrogates (the encoder
already accepts them).
- Issue #13389: Full garbage collection passes now clear the freelists for
list and dict objects. They already cleared other freelists in the
interpreter.
- Issue #13327: Remove the need for an explicit None as the second argument
to os.utime, os.lutimes, os.futimes, os.futimens, os.futimesat, in
order to update to the current time. Also added keyword argument
handling to os.utimensat in order to remove the need for explicit None.
- Issue #13350: Simplify some C code by replacing most usages of
PyUnicode_Format by PyUnicode_FromFormat.
- Issue #13342: input() used to ignore sys.stdin's and sys.stdout's unicode
error handler in interactive mode (when calling into PyOS_Readline()).
- Issue #9896: Add start, stop, and step attributes to range objects.
- Issue #13343: Fix a SystemError when a lambda expression uses a global
variable in the default value of a keyword-only argument: ``lambda *,
arg=GLOBAL_NAME: None``
- Issue #12797: Added custom opener parameter to builtin open() and
FileIO.open().
- Issue #10519: Avoid unnecessary recursive function calls in
setobject.c.
- Issue #10363: Deallocate global locks in Py_Finalize().
- Issue #13018: Fix reference leaks in error paths in dictobject.c.
Patch by Suman Saha.
- Issue #13201: Define '==' and '!=' to compare range objects based on
the sequence of values they define (instead of comparing based on
object identity).
- Issue #1294232: In a few cases involving metaclass inheritance, the
interpreter would sometimes invoke the wrong metaclass when building a new
class object. These cases now behave correctly. Patch by Daniel Urban.
- Issue #12753: Add support for Unicode name aliases and named sequences.
Both ``unicodedata.lookup()`` and '\N{...}' now resolve aliases,
and ``unicodedata.lookup()`` resolves named sequences too.
- Issue #12170: The count(), find(), rfind(), index() and rindex() methods
of bytes and bytearray objects now accept an integer between 0 and 255
as their first argument. Patch by Petri Lehtinen.
- Issue #12604: VTRACE macro expanded to no-op in _sre.c to avoid compiler
warnings. Patch by Josh Triplett and Petri Lehtinen.
- Issue #12281: Rewrite the MBCS codec to handle correctly replace and ignore
error handlers on all Windows versions. The MBCS codec is now supporting all
error handlers, instead of only replace to encode and ignore to decode.
- Issue #13188: When called without an explicit traceback argument,
generator.throw() now gets the traceback from the passed exception's
``__traceback__`` attribute. Patch by Petri Lehtinen.
- Issue #13146: Writing a pyc file is now atomic under POSIX.
- Issue #7833: Extension modules built using distutils on Windows will no
longer include a "manifest" to prevent them failing at import time in some
embedded situations.
- PEP 3151 / issue #12555: reworking the OS and IO exception hierarchy.
- Add internal API for static strings (_Py_identifier et al.).
- Issue #13063: the Windows error ERROR_NO_DATA (numbered 232 and described
as "The pipe is being closed") is now mapped to POSIX errno EPIPE
(previously EINVAL).
- Issue #12911: Fix memory consumption when calculating the repr() of huge
tuples or lists.
- PEP 393: flexible string representation. Thanks to Torsten Becker for the
initial implementation, and Victor Stinner for various bug fixes.
- Issue #14081: The 'sep' and 'maxsplit' parameter to str.split, bytes.split,
and bytearray.split may now be passed as keyword arguments.
- Issue #13012: The 'keepends' parameter to str.splitlines may now be passed
as a keyword argument: "my_string.splitlines(keepends=True)". The same
change also applies to bytes.splitlines and bytearray.splitlines.
- Issue #7732: Don't open a directory as a file anymore while importing a
module. Ignore the direcotry if its name matchs the module name (e.g.
"__init__.py") and raise a ImportError instead.
- Issue #13021: Missing decref on an error path. Thanks to Suman Saha for
finding the bug and providing a patch.
- Issue #12973: Fix overflow checks that relied on undefined behaviour in
list_repeat (listobject.c) and islice_next (itertoolsmodule.c). These bugs
caused test failures with recent versions of Clang.
- Issue #12904: os.utime, os.futimes, os.lutimes, and os.futimesat now write
atime and mtime with nanosecond precision on modern POSIX platforms.
- Issue #12802: the Windows error ERROR_DIRECTORY (numbered 267) is now
mapped to POSIX errno ENOTDIR (previously EINVAL).
- Issue #9200: The str.is* methods now work with strings that contain non-BMP
characters even in narrow Unicode builds.
- Issue #12791: Break reference cycles early when a generator exits with
an exception.
- Issue #12773: Make __doc__ mutable on user-defined classes.
- Issue #12766: Raise a ValueError when creating a class with a class variable
that conflicts with a name in __slots__.
- Issue #12266: Fix str.capitalize() to correctly uppercase/lowercase
titlecased and cased non-letter characters.
- Issue #12732: In narrow unicode builds, allow Unicode identifiers which fall
outside the BMP.
- Issue #12575: Validate user-generated AST before it is compiled.
- Make type(None), type(Ellipsis), and type(NotImplemented) callable. They
return the respective singleton instances.
- Forbid summing bytes with sum().
- Verify the types of AST strings and identifiers provided by the user before
compiling them.
- Issue #12647: The None object now has a __bool__() method that returns False.
Formerly, bool(None) returned False only because of special case logic
in PyObject_IsTrue().
- Issue #12579: str.format_map() now raises a ValueError if used on a
format string that contains positional fields. Initial patch by
Julian Berman.
- Issue #10271: Allow warnings.showwarning() be any callable.
- Issue #11627: Fix segfault when __new__ on a exception returns a
non-exception class.
- Issue #12149: Update the method cache after a type's dictionary gets
cleared by the garbage collector. This fixes a segfault when an instance
and its type get caught in a reference cycle, and the instance's
deallocator calls one of the methods on the type (e.g. when subclassing
IOBase). Diagnosis and patch by Davide Rizzo.
- Issue #9611, Issue #9015: FileIO.read() clamps the length to INT_MAX on Windows.
- Issue #9642: Uniformize the tests on the availability of the mbcs codec, add
a new HAVE_MBCS define.
- Issue #9642: Fix filesystem encoding initialization: use the ANSI code page
on Windows if the mbcs codec is not available, and fail with a fatal error if
we cannot get the locale encoding (if nl_langinfo(CODESET) is not available)
instead of using UTF-8.
- When a generator yields, do not retain the caller's exception state on the
generator.
- Issue #12475: Prevent generators from leaking their exception state into the
caller's frame as they return for the last time.
- Issue #12291: You can now load multiple marshalled objects from a stream,
with other data interleaved between marshalled objects.
- Issue #12356: When required positional or keyword-only arguments are not
given, produce a informative error message which includes the name(s) of the
missing arguments.
- Issue #12370: Fix super with no arguments when __class__ is overriden in the
class body.
- Issue #12084: os.stat on Windows now works properly with relative symbolic
links when called from any directory.
- Loosen type restrictions on the __dir__ method. __dir__ can now return any
sequence, which will be converted to a list and sorted by dir().
- Issue #12265: Make error messages produced by passing an invalid set of
arguments to a function more informative.
- Issue #12225: Still allow Python to build if Python is not in its hg repo or
mercurial is not installed.
- Issue #1195: my_fgets() now always clears errors before calling fgets(). Fix
the following case: sys.stdin.read() stopped with CTRL+d (end of file),
raw_input() interrupted by CTRL+c.
- Issue #12216: Allow unexpected EOF errors to happen on any line of the file.
- Issue #12199: The TryExcept and TryFinally and AST nodes have been unified
into a Try node.
- Issue #9670: Increase the default stack size for secondary threads on
Mac OS X and FreeBSD to reduce the chances of a crash instead of a
"maximum recursion depth" RuntimeError exception.
(patch by Ronald Oussoren)
- Issue #12106: The use of the multiple-with shorthand syntax is now reflected
in the AST.
- Issue #12190: Try to use the same filename object when compiling unmarshalling
a code objects in the same file.
- Issue #12166: Move implementations of dir() specialized for various types into
the __dir__() methods of those types.
- Issue #5715: In socketserver, close the server socket in the child process.
- Correct lookup of __dir__ on objects. Among other things, this causes errors
besides AttributeError found on lookup to be propagated.
- Issue #12060: Use sig_atomic_t type and volatile keyword in the signal
module. Patch written by Charles-François Natali.
- Issue #1746656: Added the if_nameindex, if_indextoname, if_nametoindex
methods to the socket module.
- Issue #12044: Fixed subprocess.Popen when used as a context manager to
wait for the process to end when exiting the context to avoid unintentionally
leaving zombie processes around.
- Issue #1195: Fix input() if it is interrupted by CTRL+d and then CTRL+c,
clear the end-of-file indicator after CTRL+d.
- Issue #1856: Avoid crashes and lockups when daemon threads run while the
interpreter is shutting down; instead, these threads are now killed when
they try to take the GIL.
- Issue #9756: When calling a method descriptor or a slot wrapper descriptor,
the check of the object type doesn't read the __class__ attribute anymore.
Fix a crash if a class override its __class__ attribute (e.g. a proxy of the
str type). Patch written by Andreas Stührk.
- Issue #10517: After fork(), reinitialize the TLS used by the PyGILState_*
APIs, to avoid a crash with the pthread implementation in RHEL 5. Patch
by Charles-François Natali.
- Issue #10914: Initialize correctly the filesystem codec when creating a new
subinterpreter to fix a bootstrap issue with codecs implemented in Python, as
the ISO-8859-15 codec.
- Issue #11918: OS/2 and VMS are no more supported because of the lack of
maintainer.
- Issue #6780: fix starts/endswith error message to mention that tuples are
accepted too.
- Issue #5057: fix a bug in the peepholer that led to non-portable pyc files
between narrow and wide builds while optimizing BINARY_SUBSCR on non-BMP
chars (e.g. "\U00012345"[0]).
- Issue #11845: Fix typo in rangeobject.c that caused a crash in
compute_slice_indices. Patch by Daniel Urban.
- Issue #5673: Added a `timeout` keyword argument to subprocess.Popen.wait,
subprocess.Popen.communicated, subprocess.call, subprocess.check_call, and
subprocess.check_output. If the blocking operation takes more than `timeout`
seconds, the `subprocess.TimeoutExpired` exception is raised.
- Issue #11650: PyOS_StdioReadline() retries fgets() if it was interrupted
(EINTR), for example if the program is stopped with CTRL+z on Mac OS X. Patch
written by Charles-Francois Natali.
- Issue #9319: Include the filename in "Non-UTF8 code ..." syntax error.
- Issue #10785: Store the filename as Unicode in the Python parser.
- Issue #11619: _PyImport_LoadDynamicModule() doesn't encode the path to bytes
on Windows.
- Issue #10998: Remove mentions of -Q, sys.flags.division_warning and
Py_DivisionWarningFlag left over from Python 2.
- Issue #11244: Remove an unnecessary peepholer check that was preventing
negative zeros from being constant-folded properly.
- Issue #11395: io.FileIO().write() clamps the data length to 32,767 bytes on
Windows if the file is a TTY to workaround a Windows bug. The Windows console
returns an error (12: not enough space error) on writing into stdout if
stdout mode is binary and the length is greater than 66,000 bytes (or less,
depending on heap usage).
- Issue #11320: fix bogus memory management in Modules/getpath.c, leading to
a possible crash when calling Py_SetPath().
- Issue #11432: A bug was introduced in subprocess.Popen on posix systems with
3.2.0 where the stdout or stderr file descriptor being the same as the stdin
file descriptor would raise an exception. webbrowser.open would fail. fixed.
- Issue #9856: Change object.__format__ with a non-empty format string
to be a DeprecationWarning. In 3.2 it was a PendingDeprecationWarning.
In 3.4 it will be a TypeError.
- Issue #11244: The peephole optimizer is now able to constant-fold
arbitrarily complex expressions. This also fixes a 3.2 regression where
operations involving negative numbers were not constant-folded.
- Issue #11450: Don't truncate hg version info in Py_GetBuildInfo() when
there are many tags (e.g. when using mq). Patch by Nadeem Vawda.
- Issue #11335: Fixed a memory leak in list.sort when the key function
throws an exception.
- Issue #8923: When a string is encoded to UTF-8 in strict mode, the result is
cached into the object. Examples: str.encode(), str.encode('utf-8'),
PyUnicode_AsUTF8String() and PyUnicode_AsEncodedString(unicode, "utf-8",
NULL).
- Issue #10829: Refactor PyUnicode_FromFormat(), use the same function to parse
the format string in the 3 steps, fix crashs on invalid format strings.
- Issue #13007: whichdb should recognize gdbm 1.9 magic numbers.
- Issue #11286: Raise a ValueError from calling PyMemoryView_FromBuffer with
a buffer struct having a NULL data pointer.
- Issue #11272: On Windows, input() strips '\r' (and not only '\n'), and
sys.stdin uses universal newline (replace '\r\n' by '\n').
- Issue #11828: startswith and endswith now accept None as slice index.
Patch by Torsten Becker.
- Issue #11168: Remove filename debug variable from PyEval_EvalFrameEx().
It encoded the Unicode filename to UTF-8, but the encoding fails on
undecodable filename (on surrogate characters) which raises an unexpected
UnicodeEncodeError on recursion limit.
- Issue #11187: Remove bootstrap code (use ASCII) of
PyUnicode_AsEncodedString(), it was replaced by a better fallback (use the
locale encoding) in PyUnicode_EncodeFSDefault().
- Check for NULL result in PyType_FromSpec.
- Issue #10516: New copy() and clear() methods for lists and bytearrays.
- Issue #11386: bytearray.pop() now throws IndexError when the bytearray is
empty, instead of OverflowError.
- Issue #12380: The rjust, ljust and center methods of bytes and bytearray
now accept a bytearray argument.
Library
-------
- Issue #14195: An issue that caused weakref.WeakSet instances to incorrectly
return True for a WeakSet instance 'a' in both 'a < a' and 'a > a' has been
fixed.
- Issue #14166: Pickler objects now have an optional ``dispatch_table``
attribute which allows to set custom per-pickler reduction functions.
Patch by sbt.
- Issue #14177: marshal.loads() now raises TypeError when given an unicode
string. Patch by Guilherme Gonçalves.
- Issue #13550: Remove the debug machinery from the threading module: remove
verbose arguments from all threading classes and functions.
- Issue #14159: Fix the len() of weak containers (WeakSet, WeakKeyDictionary,
WeakValueDictionary) to return a better approximation when some objects
are dead or dying. Moreover, the implementation is now O(1) rather than
O(n).
- Issue #11841: Fix comparison bug with 'rc' versions in packaging.version.
Patch by Filip Gruszczyński.
- Issue #6884: Fix long-standing bugs with MANIFEST.in parsing in distutils
on Windows. Also fixed in packaging.
- Issue #8033: sqlite3: Fix 64-bit integer handling in user functions
on 32-bit architectures. Initial patch by Philippe Devalkeneer.
- HTMLParser is now able to handle slashes in the start tag.
- Issue #13641: Decoding functions in the base64 module now accept ASCII-only
unicode strings. Patch by Catalin Iacob.
- Issue #14043: Speed up importlib's _FileFinder by at least 8x, and add a
new importlib.invalidate_caches() function.
- Issue #14001: CVE-2012-0845: xmlrpc: Fix an endless loop in
SimpleXMLRPCServer upon malformed POST request.
- Issue #13961: Move importlib over to using os.replace() for atomic renaming.
- Do away with ambiguous level values (as suggested by PEP 328) in
importlib.__import__() by raising ValueError when level < 0.
- Issue #2489: pty.spawn could consume 100% cpu when it encountered an EOF.
- Issue #13014: Fix a possible reference leak in SSLSocket.getpeercert().
- Issue #13777: Add PF_SYSTEM sockets on OS X.
Patch by Michael Goderbauer.
- Issue #13015: Fix a possible reference leak in defaultdict.__repr__.
Patch by Suman Saha.
- Issue #1326113: distutils' and packaging's build_ext commands option now
correctly parses multiple values (separated by whitespace or commas) given
to their --libraries option.
- Issue #10287: nntplib now queries the server's CAPABILITIES first before
sending MODE READER, and only sends it if not already in READER mode.
Patch by Hynek Schlawack.
- Issue #13993: HTMLParser is now able to handle broken end tags when
strict=False.
- Issue #13930: lib2to3 now supports writing converted output files to another
directory tree as well as copying unchanged files and altering the file
suffix.
- Issue #9750: Fix sqlite3.Connection.iterdump on tables and fields
with a name that is a keyword or contains quotes. Patch by Marko
Kohtala.
- Issue #10287: nntplib now queries the server's CAPABILITIES again after
authenticating (since the result may change, according to RFC 4643).
Patch by Hynek Schlawack.
- Issue #13590: On OS X 10.7 and 10.6 with Xcode 4.2, building
Distutils-based packages with C extension modules may fail because
Apple has removed gcc-4.2, the version used to build python.org
64-bit/32-bit Pythons. If the user does not explicitly override
the default C compiler by setting the CC environment variable,
Distutils will now attempt to compile extension modules with clang
if gcc-4.2 is required but not found. Also as a convenience, if
the user does explicitly set CC, substitute its value as the default
compiler in the Distutils LDSHARED configuration variable for OS X.
(Note, the python.org 32-bit-only Pythons use gcc-4.0 and the 10.4u
SDK, neither of which are available in Xcode 4. This change does not
attempt to override settings to support their use with Xcode 4.)
- Issue #13960: HTMLParser is now able to handle broken comments when
strict=False.
- When '' is a path (e.g. in sys.path), make sure __file__ uses the current
working directory instead of '' in importlib.
- Issue #13609: Add two functions to query the terminal size:
os.get_terminal_size (low level) and shutil.get_terminal_size (high level).
Patch by Zbigniew Jędrzejewski-Szmek.
- Issue #13845: On Windows, time.time() now uses GetSystemTimeAsFileTime()
instead of ftime() to have a resolution of 100 ns instead of 1 ms (the clock
accuracy is between 0.5 ms and 15 ms).
- Issue #13846: Add time.monotonic(), monotonic clock.
- Issue #8184: multiprocessing: On Windows, don't set SO_REUSEADDR on
Connection sockets, and set FILE_FLAG_FIRST_PIPE_INSTANCE on named pipes, to
make sure two listeners can't bind to the same socket/pipe (or any existing
socket/pipe).
- Issue #10811: Fix recursive usage of cursors. Instead of crashing,
raise a ProgrammingError now.
- Issue #13734: Add os.fwalk(), a directory walking function yielding file
descriptors.
- Issue #2945: Make the distutils upload command aware of bdist_rpm products.
- Issue #13712: pysetup create should not convert package_data to extra_files.
- Issue #11805: package_data in setup.cfg should allow more than one value.
- Issue #13676: Handle strings with embedded zeros correctly in sqlite3.
- Issue #8828: Add new function os.replace(), for cross-platform renaming
with overwriting.
- Issue #13848: open() and the FileIO constructor now check for NUL
characters in the file name. Patch by Hynek Schlawack.
- Issue #13806: The size check in audioop decompression functions was too
strict and could reject valid compressed data. Patch by Oleg Plakhotnyuk.
- Issue #13812: When a multiprocessing Process child raises an exception,
flush stderr after printing the exception traceback.
- Issue #13885: CVE-2011-3389: the _ssl module would always disable the CBC
IV attack countermeasure.
- Issue #13847: time.localtime() and time.gmtime() now raise an OSError instead
of ValueError on failure. time.ctime() and time.asctime() now raises an
OSError if localtime() failed. time.clock() now raises a RuntimeError if the
processor time used is not available or its value cannot be represented
- Issue #13772: In os.symlink() under Windows, do not try to guess the link
target's type (file or directory). The detection was buggy and made the
call non-atomic (therefore prone to race conditions).
- Issue #6631: Disallow relative file paths in urllib urlopen methods.
- Issue #13722: Avoid silencing ImportErrors when initializing the codecs
registry.
- Issue #13781: Fix GzipFile bug that caused an exception to be raised when
opening for writing using a fileobj returned by os.fdopen().
- Issue #13803: Under Solaris, distutils doesn't include bitness
in the directory name.
- Issue #10278: Add time.wallclock() function, monotonic clock.
- Issue #13809: Fix regression where bz2 module wouldn't work when threads are
disabled. Original patch by Amaury Forgeot d'Arc.
- Issue #13589: Fix some serialization primitives in the aifc module.
Patch by Oleg Plakhotnyuk.
- Issue #13642: Unquote before b64encoding user:password during Basic
Authentication. Patch contributed by Joonas Kuorilehto.
- Issue #12364: Fix a hang in concurrent.futures.ProcessPoolExecutor.
The hang would occur when retrieving the result of a scheduled future after
the executor had been shut down.
- Issue #13502: threading: Fix a race condition in Event.wait() that made it
return False when the event was set and cleared right after.
- Issue #9993: When the source and destination are on different filesystems,
and the source is a symlink, shutil.move() now recreates a symlink on the
destination instead of copying the file contents. Patch by Jonathan Niehof
and Hynek Schlawack.
- Issue #12926: Fix a bug in tarfile's link extraction.
- Issue #13696: Fix the 302 Relative URL Redirection problem.
- Issue #13636: Weak ciphers are now disabled by default in the ssl module
(except when SSLv2 is explicitly asked for).
- Issue #12715: Add an optional symlinks argument to shutil functions
(copyfile, copymode, copystat, copy, copy2). When that parameter is
true, symlinks aren't dereferenced and the operation instead acts on the
symlink itself (or creates one, if relevant). Patch by Hynek Schlawack.
- Add a flags parameter to select.epoll.
- Issue #13626: Add support for SSL Diffie-Hellman key exchange, through the
SSLContext.load_dh_params() method and the ssl.OP_SINGLE_DH_USE option.
- Issue #11006: Don't issue low level warning in subprocess when pipe2() fails.
- Issue #13620: Support for Chrome browser in webbrowser. Patch contributed
by Arnaud Calmettes.
- Issue #11829: Fix code execution holes in inspect.getattr_static for
metaclasses with metaclasses. Patch by Andreas Stührk.
- Issue #12708: Add starmap() and starmap_async() methods (similar to
itertools.starmap()) to multiprocessing.Pool. Patch by Hynek Schlawack.
- Issue #1785: Fix inspect and pydoc with misbehaving descriptors.
- Issue #13637: "a2b" functions in the binascii module now accept ASCII-only
unicode strings.
- Issue #13634: Add support for querying and disabling SSL compression.
- Issue #13627: Add support for SSL Elliptic Curve-based Diffie-Hellman
key exchange, through the SSLContext.set_ecdh_curve() method and the
ssl.OP_SINGLE_ECDH_USE option.
- Issue #13635: Add ssl.OP_CIPHER_SERVER_PREFERENCE, so that SSL servers
choose the cipher based on their own preferences, rather than on the
client's.
- Issue #11813: Fix inspect.getattr_static for modules. Patch by Andreas
Stührk.
- Issue #7502: Fix equality comparison for DocTestCase instances. Patch by
Cédric Krier.
- Issue #11870: threading: Properly reinitialize threads internal locks and
condition variables to avoid deadlocks in child processes.
- Issue #8035: urllib: Fix a bug where the client could remain stuck after a
redirection or an error.
- Issue #13560: os.strerror() now uses the current locale encoding instead of
UTF-8.
- Issue #8373: The filesystem path of AF_UNIX sockets now uses the filesystem
encoding and the surrogateescape error handler, rather than UTF-8. Patch
by David Watson.
- Issue #10350: Read and save errno before calling a function which might
overwrite it. Original patch by Hallvard B Furuseth.
- Issue #11610: Introduce a more general way to declare abstract properties.
- Issue #13591: A bug in importlib has been fixed that caused import_module
to load a module twice.
- Issue #13449 sched.scheduler.run() method has a new "blocking" parameter which
when set to False makes run() execute the scheduled events due to expire
soonest (if any) and then return. Patch by Giampaolo Rodolà.
- Issue #8684 sched.scheduler class can be safely used in multi-threaded
environments. Patch by Josiah Carlson and Giampaolo Rodolà.
- Alias resource.error to OSError ala PEP 3151.
- Issue #5689: Add support for lzma compression to the tarfile module.
- Issue #13248: Turn 3.2's PendingDeprecationWarning into 3.3's
DeprecationWarning. It covers 'cgi.escape', 'importlib.abc.PyLoader',
'importlib.abc.PyPycLoader', 'nntplib.NNTP.xgtitle', 'nntplib.NNTP.xpath',
and private attributes of 'smtpd.SMTPChannel'.
- Issue #5905, Issue #13560: time.strftime() is now using the current locale
encoding, instead of UTF-8, if the wcsftime() function is not available.
- Issue #13464: Add a readinto() method to http.client.HTTPResponse. Patch
by Jon Kuhn.
- tarfile.py: Correctly detect bzip2 compressed streams with blocksizes
other than 900k.
- Issue #13439: Fix many errors in turtle docstrings.
- Issue #6715: Add a module 'lzma' for compression using the LZMA algorithm.
Thanks to Per Øyvind Karlsen for the initial implementation.
- Issue #13487: Make inspect.getmodule robust against changes done to
sys.modules while it is iterating over it.
- Issue #12618: Fix a bug that prevented py_compile from creating byte
compiled files in the current directory. Initial patch by Sjoerd de Vries.
- Issue #13444: When stdout has been closed explicitly, we should not attempt
to flush it at shutdown and print an error.
- Issue #12567: The curses module uses Unicode functions for Unicode arguments
when it is linked to the ncurses library. It encodes also Unicode strings to
the locale encoding instead of UTF-8.
- Issue #12856: Ensure child processes do not inherit the parent's random
seed for filename generation in the tempfile module. Patch by Brian
Harring.
- Issue #9957: SpooledTemporaryFile.truncate() now accepts an optional size
parameter, as other file-like objects. Patch by Ryan Kelly.
- Issue #13458: Fix a memory leak in the ssl module when decoding a
certificate with a subjectAltName. Patch by Robert Xiao.
- Issue #13415: os.unsetenv() doesn't ignore errors anymore.
- Issue #13245: sched.scheduler class constructor's timefunc and
delayfunct parameters are now optional.
scheduler.enter and scheduler.enterabs methods gained a new kwargs parameter.
Patch contributed by Chris Clark.
- Issue #12328: Under Windows, refactor handling of Ctrl-C events and
make _multiprocessing.win32.WaitForMultipleObjects interruptible when
the wait_flag parameter is false. Patch by sbt.
- Issue #13322: Fix BufferedWriter.write() to ensure that BlockingIOError is
raised when the wrapped raw file is non-blocking and the write would block.
Previous code assumed that the raw write() would raise BlockingIOError, but
RawIOBase.write() is defined to returned None when the call would block.
Patch by sbt.
- Issue #13358: HTMLParser now calls handle_data only once for each CDATA.
- Issue #4147: minidom's toprettyxml no longer adds whitespace around a text
node when it is the only child of an element. Initial patch by Dan
Kenigsberg.
- Issue #13374: The Windows bytes API has been deprecated in the os module. Use
Unicode filenames instead of bytes filenames to not depend on the ANSI code
page anymore and to support any filename.
- Issue #13297: Use bytes type to send and receive binary data through XMLRPC.
- Issue #6397: Support "/dev/poll" polling objects in select module,
under Solaris & derivatives.
- Issues #1745761, #755670, #13357, #12629, #1200313: HTMLParser now correctly
handles non-valid attributes, including adjacent and unquoted attributes.
- Issue #13193: Fix distutils.filelist.FileList and packaging.manifest.Manifest
under Windows.
- Issue #13384: Remove unnecessary __future__ import in Lib/random.py
- Issue #13149: Speed up append-only StringIO objects.
- Issue #13373: multiprocessing.Queue.get() could sometimes block indefinitely
when called with a timeout. Patch by Arnaud Ysmal.
- Issue #13254: Fix Maildir initialization so that maildir contents
are read correctly.
- Issue #3067: locale.setlocale() now raises TypeError if the second
argument is an invalid iterable. Its documentation and docstring
were also updated. Initial patch by Jyrki Pulliainen.
- Issue #13140: Fix the daemon_threads attribute of ThreadingMixIn.
- Issue #13339: Fix compile error in posixmodule.c due to missing semicolon.
Thanks to Robert Xiao.
- Byte compilation in packaging is now isolated from the calling Python -B or
-O options, instead of being disallowed under -B or buggy under -O.
- Issue #10570: curses.putp() and curses.tparm() are now expecting a byte
string, instead of a Unicode string.
- Issue #13295: http.server now produces valid HTML 4.01 strict.
- Issue #2892: preserve iterparse events in case of SyntaxError.
- Issue #13287: urllib.request and urllib.error now contains an __all__
attribute to expose only relevant classes and functions. Patch by Florent
Xicluna.
- Issue #670664: Fix HTMLParser to correctly handle the content of
``<script>...</script>`` and ``<style>...</style>``.
- Issue #10817: Fix urlretrieve function to raise ContentTooShortError even
when reporthook is None. Patch by Jyrki Pulliainen.
- Fix the xmlrpc.client user agent to return something similar to
urllib.request user agent: "Python-xmlrpc/3.3".
- Issue #13293: Better error message when trying to marshal bytes using
xmlrpc.client.
- Issue #13291: NameError in xmlrpc package.
- Issue #13258: Use callable() built-in in the standard library.
- Issue #13273: fix a bug that prevented HTMLParser to properly detect some
tags when strict=False.
- Issue #11183: Add finer-grained exceptions to the ssl module, so that
you don't have to inspect the exception's attributes in the common case.
- Issue #13216: Add cp65001 codec, the Windows UTF-8 (CP_UTF8).
- Issue #13226: Add RTLD_xxx constants to the os module. These constants can be
used with sys.setdlopenflags().
- Issue #10278: Add clock_getres(), clock_gettime() and CLOCK_xxx constants to
the time module. time.clock_gettime(time.CLOCK_MONOTONIC) provides a
monotonic clock
- Issue #10332: multiprocessing: fix a race condition when a Pool is closed
before all tasks have completed.
- Issue #13255: wrong docstrings in array module.
- Issue #8540: Remove deprecated Context._clamp attribute in Decimal module.
- Issue #13235: Added DeprecationWarning to logging.warn() method and function.
- Issue #9168: now smtpd is able to bind privileged port.
- Issue #12529: fix cgi.parse_header issue on strings with double-quotes and
semicolons together. Patch by Ben Darnell and Petri Lehtinen.
- Issue #13227: functools.lru_cache() now has a option to distinguish
calls with different argument types.
- Issue #6090: zipfile raises a ValueError when a document with a timestamp
earlier than 1980 is provided. Patch contributed by Petri Lehtinen.
- Issue #13150: sysconfig no longer parses the Makefile and config.h files
when imported, instead doing it at build time. This makes importing
sysconfig faster and reduces Python startup time by 20%.
- Issue #12448: smtplib now flushes stdout while running ``python -m smtplib``
in order to display the prompt correctly.
- Issue #12454: The mailbox module is now using ASCII, instead of the locale
encoding, to read and write .mh_sequences files.
- Issue #13194: zlib.compressobj().copy() and zlib.decompressobj().copy() are
now available on Windows.
- Issue #1673007: urllib.request now supports HEAD request via new method argument.
Patch contributions by David Stanek, Patrick Westerhoff and Ezio Melotti.
- Issue #12386: packaging does not fail anymore when writing the RESOURCES
file.
- Issue #13158: Fix decoding and encoding of GNU tar specific base-256 number
fields in tarfile.
- Issue #13025: mimetypes is now reading MIME types using the UTF-8 encoding,
instead of the locale encoding.
- Issue #10653: On Windows, use strftime() instead of wcsftime() because
wcsftime() doesn't format time zone correctly.
- Issue #13150: The tokenize module doesn't compile large regular expressions
at startup anymore.
- Issue #11171: Fix distutils.sysconfig.get_makefile_filename when Python was
configured with different prefix and exec-prefix.
- Issue #11254: Teach distutils and packaging to compile .pyc and .pyo files in
PEP 3147-compliant __pycache__ directories.
- Issue #7367: Fix pkgutil.walk_paths to skip directories whose
contents cannot be read.
- Issue #3163: The struct module gets new format characters 'n' and 'N'
supporting C integer types ``ssize_t`` and ``size_t``, respectively.
- Issue #13099: Fix sqlite3.Cursor.lastrowid under a Turkish locale.
Reported and diagnosed by Thomas Kluyver.
- Issue #13087: BufferedReader.seek() now always raises UnsupportedOperation
if the underlying raw stream is unseekable, even if the seek could be
satisfied using the internal buffer. Patch by John O'Connor.
- Issue #7689: Allow pickling of dynamically created classes when their
metaclass is registered with copyreg. Patch by Nicolas M. Thiéry and Craig
Citro.
- Issue #13034: When decoding some SSL certificates, the subjectAltName
extension could be unreported.
- Issue #12306: Expose the runtime version of the zlib C library as a constant,
ZLIB_RUNTIME_VERSION, in the zlib module. Patch by Torsten Landschoff.
- Issue #12959: Add collections.ChainMap to collections.__all__.
- Issue #8933: distutils' PKG-INFO files and packaging's METADATA files will
now correctly report Metadata-Version: 1.1 instead of 1.0 if a Classifier or
Download-URL field is present.
- Issue #12567: Add curses.unget_wch() function. Push a character so the next
get_wch() will return it.
- Issue #9561: distutils and packaging now writes egg-info files using UTF-8,
instead of the locale encoding.
- Issue #8286: The distutils command sdist will print a warning message instead
of crashing when an invalid path is given in the manifest template.
- Issue #12841: tarfile unnecessarily checked the existence of numerical user
and group ids on extraction. If one of them did not exist the respective id
of the current user (i.e. root) was used for the file and ownership
information was lost.
- Issue #12888: Fix a bug in HTMLParser.unescape that prevented it to escape
more than 128 entities. Patch by Peter Otten.
- Issue #12878: Expose a __dict__ attribute on io.IOBase and its subclasses.
- Issue #12494: On error, call(), check_call(), check_output() and
getstatusoutput() functions of the subprocess module now kill the process,
read its status (to avoid zombis) and close pipes.
- Issue #12720: Expose low-level Linux extended file attribute functions in os.
- Issue #10946: The distutils commands bdist_dumb, bdist_wininst and bdist_msi
now respect a --skip-build option given to bdist. The packaging commands
were fixed too.
- Issue #12847: Fix a crash with negative PUT and LONG_BINPUT arguments in
the C pickle implementation.
- Issue #11564: Avoid crashes when trying to pickle huge objects or containers
(more than 2**31 items). Instead, in most cases, an OverflowError is raised.
- Issue #12287: Fix a stack corruption in ossaudiodev module when the FD is
greater than FD_SETSIZE.
- Issue #12839: Fix crash in zlib module due to version mismatch.
Fix by Richard M. Tew.
- Issue #9923: The mailcap module now correctly uses the platform path
separator for the MAILCAP environment variable on non-POSIX platforms.
- Issue #12835: Follow up to #6560 that unconditionally prevents use of the
unencrypted sendmsg/recvmsg APIs on SSL wrapped sockets. Patch by David
Watson.
- Issue #12803: SSLContext.load_cert_chain() now accepts a password argument
to be used if the private key is encrypted. Patch by Adam Simpkins.
- Issue #11657: Fix sending file descriptors over 255 over a multiprocessing
Pipe.
- Issue #12811: tabnanny.check() now promptly closes checked files. Patch by
Anthony Briggs.
- Issue #6560: The sendmsg/recvmsg API is now exposed by the socket module
when provided by the underlying platform, supporting processing of
ancillary data in pure Python code. Patch by David Watson and Heiko Wundram.
- Issue #12326: On Linux, sys.platform doesn't contain the major version
anymore. It is now always 'linux', instead of 'linux2' or 'linux3' depending
on the Linux version used to build Python.
- Issue #12213: Fix a buffering bug with interleaved reads and writes that
could appear on BufferedRandom streams.
- Issue #12778: Reduce memory consumption when JSON-encoding a large
container of many small objects.
- Issue #12650: Fix a race condition where a subprocess.Popen could leak
resources (FD/zombie) when killed at the wrong time.
- Issue #12744: Fix inefficient representation of integers between 2**31 and
2**63 on systems with a 64-bit C "long".
- Issue #12646: Add an 'eof' attribute to zlib.Decompress, to make it easier to
detect truncated input streams.
- Issue #11513: Fix exception handling ``tarfile.TarFile.gzopen()`` when
the file cannot be opened.
- Issue #12687: Fix a possible buffering bug when unpickling text mode
(protocol 0, mostly) pickles.
- Issue #10087: Fix the html output format of the calendar module.
- Issue #13121: add support for inplace math operators to collections.Counter.
- Add support for unary plus and unary minus to collections.Counter.
- Issue #12683: urlparse updated to include svn as schemes that uses relative
paths. (svn from 1.5 onwards support relative path).
- Issue #12655: Expose functions from sched.h in the os module: sched_yield(),
sched_setscheduler(), sched_getscheduler(), sched_setparam(),
sched_get_min_priority(), sched_get_max_priority(), sched_rr_get_interval(),
sched_getaffinity(), sched_setaffinity().
- Add ThreadError to threading.__all__.
- Issues #11104, #8688: Fix the behavior of distutils' sdist command with
manually-maintained MANIFEST files.
- Issue #11281: smtplib.STMP gets source_address parameter, which adds the
ability to bind to specific source address on a machine with multiple
interfaces. Patch by Paulo Scardine.
- Issue #12464: tempfile.TemporaryDirectory.cleanup() should not follow
symlinks: fix it. Patch by Petri Lehtinen.
- Issue #8887: "pydoc somebuiltin.somemethod" (or help('somebuiltin.somemethod')
in Python code) now finds the doc of the method.
- Issue #10968: Remove indirection in threading. The public names (Event,
Condition, etc.) used to be factory functions returning instances of hidden
classes (_Event, _Condition, etc.), because (if Guido recalls correctly) this
code pre-dates the ability to subclass extension types. It is now possible
to inherit from these classes, without having to import the private
underscored names like multiprocessing did.
- Issue #9723: Add shlex.quote functions, to escape filenames and command
lines.
- Issue #12603: Fix pydoc.synopsis() on files with non-negative st_mtime.
- Issue #12514: Use try/finally to assure the timeit module restores garbage
collections when it is done.
- Issue #12607: In subprocess, fix issue where if stdin, stdout or stderr is
given as a low fd, it gets overwritten.
- Issue #12576: Fix urlopen behavior on sites which do not send (or obfuscates)
``Connection: close`` header.
- Issue #12560: Build libpython.so on OpenBSD. Patch by Stefan Sperling.
- Issue #1813: Fix codec lookup under Turkish locales.
- Issue #12591: Improve support of "universal newlines" in the subprocess
module: the piped streams can now be properly read from or written to.
- Issue #12591: Allow io.TextIOWrapper to work with raw IO objects (without
a read1() method), and add a *write_through* parameter to mandate
unbuffered writes.
- Issue #10883: Fix socket leaks in urllib.request when using FTP.
- Issue #12592: Make Python build on OpenBSD 5 (and future major releases).
- Issue #12372: POSIX semaphores are broken on AIX: don't use them.
- Issue #12551: Provide a get_channel_binding() method on SSL sockets so as
to get channel binding data for the current SSL session (only the
"tls-unique" channel binding is implemented). This allows the implementation
of certain authentication mechanisms such as SCRAM-SHA-1-PLUS. Patch by
Jacek Konieczny.
- Issue #665194: email.utils now has format_datetime and parsedate_to_datetime
functions, allowing for round tripping of RFC2822 format dates.
- Issue #12571: Add a plat-linux3 directory mirroring the plat-linux2
directory, so that "import DLFCN" and other similar imports work on
Linux 3.0.
- Issue #7484: smtplib no longer puts <> around addresses in VRFY and EXPN
commands; they aren't required and in fact postfix doesn't support that form.
- Issue #12273: Remove ast.__version__. AST changes can be accounted for by
checking sys.version_info or sys._mercurial.
- Silence spurious "broken pipe" tracebacks when shutting down a
ProcessPoolExecutor.
- Fix potential resource leaks in concurrent.futures.ProcessPoolExecutor
by joining all queues and processes when shutdown() is called.
- Issue #11603: Fix a crash when __str__ is rebound as __repr__. Patch by
Andreas Stührk.
- Issue #11321: Fix a crash with multiple imports of the _pickle module when
embedding Python. Patch by Andreas Stührk.
- Issue #6755: Add get_wch() method to curses.window class. Patch by Iñigo
Serna.
- Add cgi.closelog() function to close the log file.
- Issue #12502: asyncore: fix polling loop with AF_UNIX sockets.
- Issue #4376: ctypes now supports nested structures in a endian different than
the parent structure. Patch by Vlad Riscutia.
- Raise ValueError when attempting to set the _CHUNK_SIZE attribute of a
TextIOWrapper to a huge value, not TypeError.
- Issue #12504: Close file handles in a timely manner in packaging.database.
This fixes a bug with the remove (uninstall) feature on Windows.
- Issues #12169 and #10510: Factor out code used by various packaging commands
to make HTTP POST requests, and make sure it uses CRLF.
- Issue #12016: Multibyte CJK decoders now resynchronize faster. They only
ignore the first byte of an invalid byte sequence. For example,
b'\xff\n'.decode('gb2312', 'replace') gives '\ufffd\n' instead of '\ufffd'.
- Issue #12459: time.sleep() now raises a ValueError if the sleep length is
negative, instead of an infinite sleep on Windows or raising an IOError on
Linux for example, to have the same behaviour on all platforms.
- Issue #12451: pydoc: html_getfile() now uses tokenize.open() to support
Python scripts using a encoding different than UTF-8 (read the coding cookie
of the script).
- Issue #12493: subprocess: Popen.communicate() now also handles EINTR errors
if the process has only one pipe.
- Issue #12467: warnings: fix a race condition if a warning is emitted at
shutdown, if globals()['__file__'] is None.
- Issue #12451: pydoc: importfile() now opens the Python script in binary mode,
instead of text mode using the locale encoding, to avoid encoding issues.
- Issue #12451: runpy: run_path() now opens the Python script in binary mode,
instead of text mode using the locale encoding, to support other encodings
than UTF-8 (scripts using the coding cookie).
- Issue #12451: xml.dom.pulldom: parse() now opens files in binary mode instead
of the text mode (using the locale encoding) to avoid encoding issues.
- Issue #12147: Adjust the new-in-3.2 smtplib.send_message method for better
conformance to the RFCs: correctly handle Sender and Resent- headers.
- Issue #12352: Fix a deadlock in multiprocessing.Heap when a block is freed by
the garbage collector while the Heap lock is held.
- Issue #12462: time.sleep() now immediately calls the (Python) signal handler
if it is interrupted by a signal, instead of having to wait until the next
instruction.
- Issue #12442: new shutil.disk_usage function, providing total, used and free
disk space statistics.
- Issue #12451: The XInclude default loader of xml.etree now decodes files from
UTF-8 instead of the locale encoding if the encoding is not specified. It now
also opens XML files for the parser in binary mode instead of the text mode
to avoid encoding issues.
- Issue #12451: doctest.debug_script() doesn't create a temporary file
anymore to avoid encoding issues.
- Issue #12451: pydoc.synopsis() now reads the encoding cookie if available,
to read the Python script from the right encoding.
- Issue #12451: distutils now opens the setup script in binary mode to read the
encoding cookie, instead of opening it in UTF-8.
- Issue #9516: On Mac OS X, change Distutils to no longer globally attempt to
check or set the MACOSX_DEPLOYMENT_TARGET environment variable for the
interpreter process. This could cause failures in non-Distutils subprocesses
and was unreliable since tests or user programs could modify the interpreter
environment after Distutils set it. Instead, have Distutils set the
deployment target only in the environment of each build subprocess. It is
still possible to globally override the default by setting
MACOSX_DEPLOYMENT_TARGET before launching the interpreter; its value must be
greater or equal to the default value, the value with which the interpreter
was built. Also, implement the same handling in packaging.
- Issue #12422: In the copy module, don't store objects that are their own copy
in the memo dict.
- Issue #12303: Add sigwaitinfo() and sigtimedwait() to the signal module.
- Issue #12404: Remove C89 incompatible code from mmap module. Patch by Akira
Kitada.
- Issue #1874: email now detects and reports as a defect the presence of
any CTE other than 7bit, 8bit, or binary on a multipart.
- Issue #12383: Fix subprocess module with env={}: don't copy the environment
variables, start with an empty environment.
- Issue #11637: Fix support for importing packaging setup hooks from the
project directory.
- Issue #6771: Moved the curses.wrapper function from the single-function
wrapper module into __init__, eliminating the module. Since __init__ was
already importing the function to curses.wrapper, there is no API change.
- Issue #11584: email.header.decode_header no longer fails if the header
passed to it is a Header object, and Header/make_header no longer fail
if given binary unknown-8bit input.
- Issue #11700: mailbox proxy object close methods can now be called multiple
times without error.
- Issue #11767: Correct file descriptor leak in mailbox's __getitem__ method.
- Issue #12133: AbstractHTTPHandler.do_open() of urllib.request closes the HTTP
connection if its getresponse() method fails with a socket error. Patch
written by Ezio Melotti.
- Issue #12240: Allow multiple setup hooks in packaging's setup.cfg files.
Original patch by Erik Bray.
- Issue #9284: Allow inspect.findsource() to find the source of doctest
functions.
- Issue #11595: Fix assorted bugs in packaging.util.cfg_to_args, a
compatibility helper for the distutils-packaging transition. Original patch
by Erik Bray.
- Issue #12287: In ossaudiodev, check that the device isn't closed in several
methods.
- Issue #12009: Fixed regression in netrc file comment handling.
- Issue #12246: Warn and fail when trying to install a third-party project from
an uninstalled Python (built in a source checkout). Original patch by
Tshepang Lekhonkhobe.
- Issue #10694: zipfile now ignores garbage at the end of a zipfile.
- Issue #12283: Fixed regression in smtplib quoting of leading dots in DATA.
- Issue #10424: Argparse now includes the names of the missing required
arguments in the missing arguments error message.
- Issue #12168: SysLogHandler now allows NUL termination to be controlled using
a new 'append_nul' attribute on the handler.
- Issue #11583: Speed up os.path.isdir on Windows by using GetFileAttributes
instead of os.stat.
- Issue #12021: Make mmap's read() method argument optional. Patch by Petri
Lehtinen.
- Issue #9205: concurrent.futures.ProcessPoolExecutor now detects killed
children and raises BrokenProcessPool in such a situation. Previously it
would reliably freeze/deadlock.
- Issue #12040: Expose a new attribute ``sentinel`` on instances of
``multiprocessing.Process``. Also, fix Process.join() to not use polling
anymore, when given a timeout.
- Issue #11893: Remove obsolete internal wrapper class ``SSLFakeFile`` in the
smtplib module. Patch by Catalin Iacob.
- Issue #12080: Fix a Decimal.power() case that took an unreasonably long time
to compute.
- Issue #12221: Remove __version__ attributes from pyexpat, pickle, tarfile,
pydoc, tkinter, and xml.parsers.expat. This were useless version constants
left over from the Mercurial transition
- Named tuples now work correctly with vars().
- Issue #12085: Fix an attribute error in subprocess.Popen destructor if the
constructor has failed, e.g. because of an undeclared keyword argument. Patch
written by Oleg Oshmyan.
- Issue #12028: Make threading._get_ident() public, rename it to
threading.get_ident() and document it. This function was already used using
_thread.get_ident().
- Issue #12171: IncrementalEncoder.reset() of CJK codecs (multibytecodec) calls
encreset() instead of decreset().
- Issue #12218: Removed wsgiref.egg-info.
- Issue #12196: Add pipe2() to the os module.
- Issue #985064: Make plistlib more resilient to faulty input plists.
Patch by Mher Movsisyan.
- Issue #1625: BZ2File and bz2.decompress() now support multi-stream files.
Initial patch by Nir Aides.
- Issue #12175: BufferedReader.read(-1) now calls raw.readall() if available.
- Issue #12175: FileIO.readall() now only reads the file position and size
once.
- Issue #12175: RawIOBase.readall() now returns None if read() returns None.
- Issue #12175: FileIO.readall() now raises a ValueError instead of an IOError
if the file is closed.
- Issue #11109: New service_action method for BaseServer, used by ForkingMixin
class for cleanup. Initial Patch by Justin Warkentin.
- Issue #12045: Avoid duplicate execution of command in
ctypes.util._get_soname(). Patch by Sijin Joseph.
- Issue #10818: Remove the Tk GUI and the serve() function of the pydoc module,
pydoc -g has been deprecated in Python 3.2 and it has a new enhanced web
server.
- Issue #1441530: In imaplib, read the data in one chunk to speed up large
reads and simplify code.
- Issue #12070: Fix the Makefile parser of the sysconfig module to handle
correctly references to "bogus variable" (e.g. "prefix=$/opt/python").
- Issue #12100: Don't reset incremental encoders of CJK codecs at each call to
their encode() method anymore, but continue to call the reset() method if the
final argument is True.
- Issue #12049: Add RAND_bytes() and RAND_pseudo_bytes() functions to the ssl
module.
- Issue #6501: os.device_encoding() returns None on Windows if the application
has no console.
- Issue #12105: Add O_CLOEXEC to the os module.
- Issue #12079: Decimal('Infinity').fma(Decimal('0'), (3.91224318126786e+19+0j))
now raises TypeError (reflecting the invalid type of the 3rd argument) rather
than Decimal.InvalidOperation.
- Issue #12124: zipimport doesn't keep a reference to zlib.decompress() anymore
to be able to unload the module.
- Add the packaging module, an improved fork of distutils (also known as
distutils2).
- Issue #12065: connect_ex() on an SSL socket now returns the original errno
when the socket's timeout expires (it used to return None).
- Issue #8809: The SMTP_SSL constructor and SMTP.starttls() now support
passing a ``context`` argument pointing to an ssl.SSLContext instance.
Patch by Kasun Herath.
- Issue #9516: Issue #9516: avoid errors in sysconfig when MACOSX_DEPLOYMENT_TARGET
is set in shell.
- Issue #8650: Make zlib module 64-bit clean. compress(), decompress() and
their incremental counterparts now raise OverflowError if given an input
larger than 4GB, instead of silently truncating the input and returning
an incorrect result.
- Issue #12050: zlib.decompressobj().decompress() now clears the unconsumed_tail
attribute when called without a max_length argument.
- Issue #12062: Fix a flushing bug when doing a certain type of I/O sequence
on a file opened in read+write mode (namely: reading, seeking a bit forward,
writing, then seeking before the previous write but still within buffered
data, and writing again).
- Issue #9971: Write an optimized implementation of BufferedReader.readinto().
Patch by John O'Connor.
- Issue #11799: urllib.request Authentication Handlers will raise a ValueError
when presented with an unsupported Authentication Scheme. Patch contributed
by Yuval Greenfield.
- Issue #10419, #6011: build_scripts command of distutils handles correctly
non-ASCII path (path to the Python executable). Open and write the script in
binary mode, but ensure that the shebang is decodable from UTF-8 and from the
encoding of the script.
- Issue #8498: In socket.accept(), allow to specify 0 as a backlog value in
order to accept exactly one connection. Patch by Daniel Evers.
- Issue #12011: signal.signal() and signal.siginterrupt() raise an OSError,
instead of a RuntimeError: OSError has an errno attribute.
- Issue #3709: add a flush_headers method to BaseHTTPRequestHandler, which
manages the sending of headers to output stream and flushing the internal
headers buffer. Patch contribution by Andrew Schaaf
- Issue #11743: Rewrite multiprocessing connection classes in pure Python.
- Issue #11164: Stop trying to use _xmlplus in the xml module.
- Issue #11888: Add log2 function to math module. Patch written by Mark
Dickinson.
- Issue #12012: ssl.PROTOCOL_SSLv2 becomes optional.
- Issue #8407: The signal handler writes the signal number as a single byte
instead of a nul byte into the wakeup file descriptor. So it is possible to
wait more than one signal and know which signals were raised.
- Issue #8407: Add pthread_kill(), sigpending() and sigwait() functions to the
signal module.
- Issue #11927: SMTP_SSL now uses port 465 by default as documented. Patch
by Kasun Herath.
- Issue #12002: ftplib's abort() method raises TypeError.
- Issue #11916: Add a number of MacOSX specific definitions to the errno module.
Patch by Pierre Carrier.
- Issue #11999: fixed sporadic sync failure mailbox.Maildir due to its trying to
detect mtime changes by comparing to the system clock instead of to the
previous value of the mtime.
- Issue #11072: added MLSD command (RFC-3659) support to ftplib.
- Issue #8808: The IMAP4_SSL constructor now allows passing an SSLContext
parameter to control parameters of the secure channel. Patch by Sijin
Joseph.
- ntpath.samefile failed to notice that "a.txt" and "A.TXT" refer to the same
file on Windows XP. As noticed in issue #10684.
- Issue #12000: When a SSL certificate has a subjectAltName without any
dNSName entry, ssl.match_hostname() should use the subject's commonName.
Patch by Nicolas Bareil.
- Issue #10775: assertRaises, assertRaisesRegex, assertWarns, and
assertWarnsRegex now accept a keyword argument 'msg' when used as context
managers. Initial patch by Winston Ewert.
- Issue #10684: shutil.move used to delete a folder on case insensitive
filesystems when the source and destination name where the same except
for the case.
- Issue #11647: objects created using contextlib.contextmanager now support
more than one call to the function when used as a decorator. Initial patch
by Ysj Ray.
- Issue #11930: Removed deprecated time.accept2dyear variable.
Removed year >= 1000 restriction from datetime.strftime.
- logging: don't define QueueListener if Python has no thread support.
- functools.cmp_to_key() now works with collections.Hashable().
- Issue #11277: mmap.mmap() calls fcntl(fd, F_FULLFSYNC) on Mac OS X to get
around a mmap bug with sparse files. Patch written by Steffen Daode Nurpmeso.
- Issue #8407: Add signal.pthread_sigmask() function to fetch and/or change the
signal mask of the calling thread.
- Issue #11858: configparser.ExtendedInterpolation expected lower-case section
names.
- Issue #11324: ConfigParser(interpolation=None) now works correctly.
- Issue #11811: ssl.get_server_certificate() is now IPv6-compatible. Patch
by Charles-François Natali.
- Issue #11763: don't use difflib in TestCase.assertMultiLineEqual if the
strings are too long.
- Issue #11236: getpass.getpass responds to ctrl-c or ctrl-z on terminal.
- Issue #11856: Speed up parsing of JSON numbers.
- Issue #11005: threading.RLock()._release_save() raises a RuntimeError if the
lock was not acquired.
- Issue #11258: Speed up ctypes.util.find_library() under Linux by a factor
of 5 to 10. Initial patch by Jonas H.
- Issue #11382: Trivial system calls, such as dup() or pipe(), needn't
release the GIL. Patch by Charles-François Natali.
- Issue #11223: Add threading._info() function providing informations about
the thread implementation.
- Issue #11731: simplify/enhance email parser/generator API by introducing
policy objects.
- Issue #11768: The signal handler of the signal module only calls
Py_AddPendingCall() for the first signal to fix a deadlock on reentrant or
parallel calls. PyErr_SetInterrupt() writes also into the wake up file.
- Issue #11492: fix several issues with header folding in the email package.
- Issue #11852: Add missing imports and update tests.
- Issue #11875: collections.OrderedDict's __reduce__ was temporarily
mutating the object instead of just working on a copy.
- Issue #11467: Fix urlparse behavior when handling urls which contains scheme
specific part only digits. Patch by Santoso Wijaya.
- collections.Counter().copy() now works correctly for subclasses.
- Issue #11474: Fix the bug with url2pathname() handling of '/C|/' on Windows.
Patch by Santoso Wijaya.
- Issue #11684: complete email.parser bytes API by adding BytesHeaderParser.
- The bz2 module now handles 4GiB+ input buffers correctly.
- Issue #9233: Fix json.loads('{}') to return a dict (instead of a list), when
_json is not available.
- Issue #11830: Remove unnecessary introspection code in the decimal module.
- Issue #11703: urllib2.geturl() does not return correct url when the original
url contains #fragment.
- Issue #10019: Fixed regression in json module where an indent of 0 stopped
adding newlines and acted instead like 'None'.
- Issue #11186: pydoc ignores a module if its name contains a surrogate
character in the index of modules.
- Issue #11815: Use a light-weight SimpleQueue for the result queue in
concurrent.futures.ProcessPoolExecutor.
- Issue #5162: Treat services like frozen executables to allow child spawning
from multiprocessing.forking on Windows.
- logging.basicConfig now supports an optional 'handlers' argument taking an
iterable of handlers to be added to the root logger. Additional parameter
checks were also added to basicConfig.
- Issue #11814: Fix likely typo in multiprocessing.Pool._terminate().
- Issue #11747: Fix range formatting in difflib.context_diff() and
difflib.unified_diff().
- Issue #8428: Fix a race condition in multiprocessing.Pool when terminating
worker processes: new processes would be spawned while the pool is being
shut down. Patch by Charles-François Natali.
- Issue #2650: re.escape() no longer escapes the '_'.
- Issue #11757: select.select() now raises ValueError when a negative timeout
is passed (previously, a select.error with EINVAL would be raised). Patch
by Charles-François Natali.
- Issue #7311: fix html.parser to accept non-ASCII attribute values.
- Issue #11605: email.parser.BytesFeedParser was incorrectly converting
multipart subparts with an 8-bit CTE into unicode instead of preserving the
bytes.
- Issue #1690608: email.util.formataddr is now RFC 2047 aware: it now has a
charset parameter that defaults to utf-8 and is used as the charset for RFC
2047 encoding when the realname contains non-ASCII characters.
- Issue #10963: Ensure that subprocess.communicate() never raises EPIPE.
- Issue #10791: Implement missing method GzipFile.read1(), allowing GzipFile
to be wrapped in a TextIOWrapper. Patch by Nadeem Vawda.
- Issue #11707: Added a fast C version of functools.cmp_to_key().
Patch by Filip Gruszczyński.
- Issue #11688: Add sqlite3.Connection.set_trace_callback(). Patch by
Torsten Landschoff.
- Issue #11746: Fix SSLContext.load_cert_chain() to accept elliptic curve
private keys.
- Issue #5863: Rewrite BZ2File in pure Python, and allow it to accept
file-like objects using a new ``fileobj`` constructor argument. Patch by
Nadeem Vawda.
- unittest.TestCase.assertSameElements has been removed.
- sys.getfilesystemencoding() raises a RuntimeError if initfsencoding() was not
called yet: detect bootstrap (startup) issues earlier.
- Issue #11393: Add the new faulthandler module.
- Issue #11618: Fix the timeout logic in threading.Lock.acquire() under Windows.
- Removed the 'strict' argument to email.parser.Parser, which has been
deprecated since Python 2.4.
- Issue #11256: Fix inspect.getcallargs on functions that take only keyword
arguments.
- Issue #11696: Fix ID generation in msilib.
- itertools.accumulate now supports an optional *func* argument for
a user-supplied binary function.
- Issue #11692: Remove unnecessary demo functions in subprocess module.
- Issue #9696: Fix exception incorrectly raised by xdrlib.Packer.pack_int when
trying to pack a negative (in-range) integer.
- Issue #11675: multiprocessing.[Raw]Array objects created from an integer size
are now zeroed on creation. This matches the behaviour specified by the
documentation.
- Issue #7639: Fix short file name generation in bdist_msi
- Issue #11635: Don't use polling in worker threads and processes launched by
concurrent.futures.
- Issue #5845: Automatically read readline configuration to enable completion
in interactive mode.
- Issue #6811: Allow importlib to change a code object's co_filename attribute
to match the path to where the source code currently is, not where the code
object originally came from.
- Issue #8754: Have importlib use the repr of a module name in error messages.
- Issue #11591: Prevent "import site" from modifying sys.path when python
was started with -S.
- collections.namedtuple() now adds a _source attribute to the generated
class. This make the source more accessible than the outdated
"verbose" option which prints to stdout but doesn't make the source
string available.
- Issue #11371: Mark getopt error messages as localizable. Patch by Filip
Gruszczyński.
- Issue #11333: Add __slots__ to collections ABCs.
- Issue #11628: cmp_to_key generated class should use __slots__.
- Issue #11666: let help() display named tuple attributes and methods
that start with a leading underscore.
- Issue #11662: Make urllib and urllib2 ignore redirections if the
scheme is not HTTP, HTTPS or FTP (CVE-2011-1521).
- Issue #5537: Fix time2isoz() and time2netscape() functions of
httplib.cookiejar for expiration year greater than 2038 on 32-bit systems.
- Issue #4391: Use proper gettext plural forms in optparse.
- Issue #11127: Raise a TypeError when trying to pickle a socket object.
- Issue #11563: ``Connection: close`` header is sent by requests using URLOpener
class which helps in closing of sockets after connection is over. Patch
contributions by Jeff McNeil and Nadeem Vawda.
- Issue #11459: A ``bufsize`` value of 0 in subprocess.Popen() really creates
unbuffered pipes, such that select() works properly on them.
- Issue #5421: Fix misleading error message when one of socket.sendto()'s
arguments has the wrong type. Patch by Nikita Vetoshkin.
- Issue #10812: Add some extra posix functions to the os module.
- Issue #10979: unittest stdout buffering now works with class and module
setup and teardown.
- Issue #11243: fix the parameter querying methods of Message to work if
the headers contain un-encoded non-ASCII data.
- Issue #11401: fix handling of headers with no value; this fixes a regression
relative to Python2 and the result is now the same as it was in Python2.
- Issue #9298: base64 bodies weren't being folded to line lengths less than 78,
which was a regression relative to Python2. Unlike Python2, the last line
of the folded body now ends with a carriage return.
- Issue #11560: shutil.unpack_archive now correctly handles the format
parameter. Patch by Evan Dandrea.
- Issue #5870: Add `subprocess.DEVNULL` constant.
- Issue #11133: fix two cases where inspect.getattr_static can trigger code
execution. Patch by Andreas Stührk.
- Issue #11569: use absolute path to the sysctl command in multiprocessing to
ensure that it will be found regardless of the shell PATH. This ensures
that multiprocessing.cpu_count works on default installs of MacOSX.
- Issue #11501: disutils.archive_utils.make_zipfile no longer fails if zlib is
not installed. Instead, the zipfile.ZIP_STORED compression is used to create
the ZipFile. Patch by Natalia B. Bidart.
- Issue #11289: `smtp.SMTP` class is now a context manager so it can be used
in a `with` statement. Contributed by Giampaolo Rodola.
- Issue #11554: Fixed support for Japanese codecs; previously the body output
encoding was not done if euc-jp or shift-jis was specified as the charset.
- Issue #11407: `TestCase.run` returns the result object used or created.
Contributed by Janathan Hartley.
- Issue #11500: Fixed a bug in the OS X proxy bypass code for fully qualified
IP addresses in the proxy exception list.
- Issue #11491: dbm.error is no longer raised when dbm.open is called with
the "n" as the flag argument and the file exists. The behavior matches
the documentation and general logic.
- Issue #1162477: Postel Principle adjustment to email date parsing: handle the
fact that some non-compliant MUAs use '.' instead of ':' in time specs.
- Issue #11131: Fix sign of zero in decimal.Decimal plus and minus
operations when the rounding mode is ROUND_FLOOR.
- Issue #9935: Speed up pickling of instances of user-defined classes.
- Issue #5622: Fix curses.wrapper to raise correct exception if curses
initialization fails.
- Issue #11408: In threading.Lock.acquire(), only call gettimeofday() when
really necessary. Patch by Charles-François Natali.
- Issue #11391: Writing to a mmap object created with
``mmap.PROT_READ|mmap.PROT_EXEC`` would segfault instead of raising a
TypeError. Patch by Charles-François Natali.
- Issue #9795: add context manager protocol support for nntplib.NNTP class.
- Issue #11306: mailbox in certain cases adapts to an inability to open
certain files in read-write mode. Previously it detected this by
checking for EACCES, now it also checks for EROFS.
- Issue #11265: asyncore now correctly handles EPIPE, EBADF and EAGAIN errors
on accept(), send() and recv().
- Issue #11377: Deprecate platform.popen() and reimplement it with os.popen().
- Issue #8513: On UNIX, subprocess supports bytes command string.
- Issue #10866: Add socket.sethostname(). Initial patch by Ross Lagerwall.
- Issue #11140: Lock.release() now raises a RuntimeError when attempting
to release an unacquired lock, as claimed in the threading documentation.
The _thread.error exception is now an alias of RuntimeError. Patch by
Filip Gruszczyński. Patch for _dummy_thread by Aymeric Augustin.
- Issue #8594: ftplib now provides a source_address parameter to specify which
(address, port) to bind to before connecting.
- Issue #11326: Add the missing connect_ex() implementation for SSL sockets,
and make it work for non-blocking connects.
- Issue #11297: Add collections.ChainMap().
- Issue #10755: Add the posix.flistdir() function. Patch by Ross Lagerwall.
- Issue #4761: Add the ``*at()`` family of functions (openat(), etc.) to the
posix module. Patch by Ross Lagerwall.
- Issue #7322: Trying to read from a socket's file-like object after a timeout
occurred now raises an error instead of silently losing data.
- Issue #11291: poplib.POP no longer suppresses errors on quit().
- Issue #11177: asyncore's create_socket() arguments can now be omitted.
- Issue #6064: Add a ``daemon`` keyword argument to the threading.Thread
and multiprocessing.Process constructors in order to override the
default behaviour of inheriting the daemonic property from the current
thread/process.
- Issue #10956: Buffered I/O classes retry reading or writing after a signal
has arrived and the handler returned successfully.
- Issue #10784: New os.getpriority() and os.setpriority() functions.
- Issue #11114: Fix catastrophic performance of tell() on text files (up
to 1000x faster in some cases). It is still one to two order of magnitudes
slower than binary tell().
- Issue #10882: Add os.sendfile function.
- Issue #10868: Allow usage of the register method of an ABC as a class
decorator.
- Issue #11224: Fixed a regression in tarfile that affected the file-like
objects returned by TarFile.extractfile() regarding performance, memory
consumption and failures with the stream interface.
- Issue #10924: Adding salt and Modular Crypt Format to crypt library.
Moved old C wrapper to _crypt, and added a Python wrapper with
enhanced salt generation and simpler API for password generation.
- Issue #11074: Make 'tokenize' so it can be reloaded.
- Issue #11085: Moved collections abstract base classes into a separate
module called collections.abc, following the pattern used by importlib.abc.
For backwards compatibility, the names are imported into the collections
module.
- Issue #4681: Allow mmap() to work on file sizes and offsets larger than
4GB, even on 32-bit builds. Initial patch by Ross Lagerwall, adapted for
32-bit Windows.
- Issue #11169: compileall module uses repr() to format filenames and paths to
escape surrogate characters and show spaces.
- Issue #11089: Fix performance issue limiting the use of ConfigParser()
with large config files.
- Issue #10276: Fix the results of zlib.crc32() and zlib.adler32() on buffers
larger than 4GB. Patch by Nadeem Vawda.
- Issue #11388: Added a clear() method to MutableSequence
- Issue #11174: Add argparse.MetavarTypeHelpFormatter, which uses type names
for the names of optional and positional arguments in help messages.
- Issue #9348: Raise an early error if argparse nargs and metavar don't match.
- Issue #9026: Fix order of argparse sub-commands in help messages.
- Issue #9347: Fix formatting for tuples in argparse type= error messages.
- Issue #12191: Added shutil.chown() to change user and/or group owner of a
given path also specifying their names.
- Issue #13988: The _elementtree accelerator is used whenever available.
Now xml.etree.cElementTree becomes a deprecated alias to ElementTree.
Build
-----
- Issue #6807: Run msisupport.mak earlier.
- Issue #10580: Minor grammar change in Windows installer.
- Issue #13326: Clean __pycache__ directories correctly on OpenBSD.
- PEP 393: the configure option --with-wide-unicode is removed.
- Issue #12852: Set _XOPEN_SOURCE to 700, instead of 600, to get POSIX 2008
functions on OpenBSD (e.g. fdopendir).
- Issue #11863: Remove support for legacy systems deprecated in Python 3.2
(following PEP 11). These systems are systems using Mach C Threads,
SunOS lightweight processes, GNU pth threads and IRIX threads.
- Issue #8746: Correct faulty configure checks so that os.chflags() and
os.lchflags() are once again built on systems that support these
functions (BSD and OS X). Also add new stat file flags for OS X
(UF_HIDDEN and UF_COMPRESSED).
- Issue #10645: Installing Python no longer creates a
Python-X.Y.Z-pyX.Y.egg-info file in the lib-dynload directory.
- Do not accidentally include the directory containing sqlite.h twice when
building sqlite3.
- Issue #11217: For 64-bit/32-bit Mac OS X universal framework builds,
ensure "make install" creates symlinks in --prefix bin for the "-32"
files in the framework bin directory like the installer does.
- Issue #11347: Use --no-as-needed when linking libpython3.so.
- Issue #11411: Fix 'make DESTDIR=' with a relative destination.
- Issue #11268: Prevent Mac OS X Installer failure if Documentation
package had previously been installed.
- Issue #11495: OSF support is eliminated. It was deprecated in Python 3.2.
IDLE
----
- Issue #14409: IDLE now properly executes commands in the Shell window
when it cannot read the normal config files on startup and
has to use the built-in default key bindings.
There was previously a bug in one of the defaults.
- IDLE can be launched as python -m idlelib
- Issue #3573: IDLE hangs when passing invalid command line args
(directory(ies) instead of file(s)) (Patch by Guilherme Polo)
- Issue #14200: IDLE shell crash on printing non-BMP unicode character.
- Issue #5219: Prevent event handler cascade in IDLE.
- Issue #964437: Make IDLE help window non-modal.
Patch by Guilherme Polo and Roger Serwy.
- Issue #13933: IDLE auto-complete did not work with some imported
module, like hashlib. (Patch by Roger Serwy)
- Issue #13506: Add '' to path for IDLE Shell when started and restarted with Restart Shell.
Original patches by Marco Scataglini and Roger Serwy.
- Issue #4625: If IDLE cannot write to its recent file or breakpoint files,
display a message popup and continue rather than crash. Original patch by
Roger Serwy.
- Issue #8641: Update IDLE 3 syntax coloring to recognize b".." and not u"..".
Patch by Tal Einat.
- Issue #13296: Fix IDLE to clear compile __future__ flags on shell restart.
(Patch by Roger Serwy)
- Issue #9871: Prevent IDLE 3 crash when given byte stings
with invalid hex escape sequences, like b'\x0'.
(Original patch by Claudiu Popa.)
- Issue #12636: IDLE reads the coding cookie when executing a Python script.
- Issue #12540: Prevent zombie IDLE processes on Windows due to changes
in os.kill().
- Issue #12590: IDLE editor window now always displays the first line
when opening a long file. With Tk 8.5, the first line was hidden.
- Issue #11088: don't crash when using F5 to run a script in IDLE on MacOSX
with Tk 8.5.
- Issue #1028: Tk returns invalid Unicode null in %A: UnicodeDecodeError.
With Tk < 8.5 _tkinter.c:PythonCmd() raised UnicodeDecodeError, caused
IDLE to exit. Converted to valid Unicode null in PythonCmd().
- Issue #11718: IDLE's open module dialog couldn't find the __init__.py
file in a package.
Tools/Demos
-----------
- Issue #14053: patchcheck.py ("make patchcheck") now works with MQ patches.
Patch by Francisco Martín Brugué.
- Issue #13930: 2to3 is now able to write its converted output files to another
directory tree as well as copying unchanged files and altering the file
suffix. See its new -o, -W and --add-suffix options. This makes it more
useful in many automated code translation workflows.
- Issue #13628: python-gdb.py is now able to retrieve more frames in the Python
traceback if Python is optimized.
- Issue #11996: libpython (gdb), replace "py-bt" command by "py-bt-full" and
add a smarter "py-bt" command printing a classic Python traceback.
- Issue #11179: Make ccbench work under Python 3.1 and 2.7 again.
- Issue #10639: reindent.py no longer converts newlines and will raise
an error if attempting to convert a file with mixed newlines.
"--newline" option added to specify new line character.
Extension Modules
-----------------
- Issue #16847: Fixed improper use of _PyUnicode_CheckConsistency() in
non-pydebug builds. Several extension modules now compile cleanly when
assert()s are enabled in standard builds (-DDEBUG flag).
- Issue #13840: The error message produced by ctypes.create_string_buffer
when given a Unicode string has been fixed.
- Issue #9975: socket: Fix incorrect use of flowinfo and scope_id. Patch by
Vilmos Nebehaj.
- Issue #7777: socket: Add Reliable Datagram Sockets (PF_RDS) support.
- Issue #13159: FileIO and BZ2Compressor/BZ2Decompressor now use a linear-time
buffer growth strategy instead of a quadratic-time one.
- Issue #10141: socket: Add SocketCAN (PF_CAN) support. Initial patch by
Matthias Fuchs, updated by Tiago Gonçalves.
- Issue #13070: Fix a crash when a TextIOWrapper caught in a reference cycle
would be finalized after the reference to its underlying BufferedRWPair's
writer got cleared by the GC.
- Issue #12881: ctypes: Fix segfault with large structure field names.
- Issue #13058: ossaudiodev: fix a file descriptor leak on error. Patch by
Thomas Jarosch.
- Issue #13013: ctypes: Fix a reference leak in PyCArrayType_from_ctype.
Thanks to Suman Saha for finding the bug and providing a patch.
- Issue #13022: Fix: _multiprocessing.recvfd() doesn't check that
file descriptor was actually received.
- Issue #1172711: Add 'long long' support to the array module.
Initial patch by Oren Tirosh and Hirokazu Yamamoto.
- Issue #12483: ctypes: Fix a crash when the destruction of a callback
object triggers the garbage collector.
- Issue #12950: Fix passing file descriptors in multiprocessing, under
OpenIndiana/Illumos.
- Issue #12764: Fix a crash in ctypes when the name of a Structure field is not
a string.
- Issue #11241: subclasses of ctypes.Array can now be subclassed.
- Issue #9651: Fix a crash when ctypes.create_string_buffer(0) was passed to
some functions like file.write().
- Issue #10309: Define _GNU_SOURCE so that mremap() gets the proper
signature. Without this, architectures where sizeof void* != sizeof int are
broken. Patch given by Hallvard B Furuseth.
- Issue #12051: Fix segfault in json.dumps() while encoding highly-nested
objects using the C accelerations.
- Issue #12017: Fix segfault in json.loads() while decoding highly-nested
objects using the C accelerations.
- Issue #1838: Prevent segfault in ctypes, when _as_parameter_ on a class is set
to an instance of the class.
Tests
-----
- Issue #13125: Silence spurious test_lib2to3 output when in non-verbose mode.
Patch by Mikhail Novikov.
- Issue #13447: Add a test file to host regression tests for bugs in the
scripts found in the Tools directory.
- Issue #10881: Fix test_site failure with OS X framework builds.
- Issue #13901: Prevent test_distutils failures on OS X with --enable-shared.
- Issue #13862: Fix spurious failure in test_zlib due to runtime/compile time
minor versions not matching.
- Issue #12804: Fix test_socket and test_urllib2net failures when running tests
on a system without internet access.
- Issue #13726: Fix the ambiguous -S flag in regrtest. It is -o/--slow for slow
tests.
- Issue #11659: Fix ResourceWarning in test_subprocess introduced by #11459.
Patch by Ben Hayden.
- Issue #11577: fix ResourceWarning triggered by improved binhex test coverage
- Issue #11509: Significantly increase test coverage of fileinput.
Patch by Denver Coneybeare at PyCon 2011 Sprints.
- Issue #11689: Fix a variable scoping error in an sqlite3 test
- Issue #13786: Remove unimplemented 'trace' long option from regrtest.py.
- Issue #13725: Fix regrtest to recognize the documented -d flag.
Patch by Erno Tukia.
- Issue #13304: Skip test case if user site-packages disabled (-s or
PYTHONNOUSERSITE). (Patch by Carl Meyer)
- Issue #5661: Add a test for ECONNRESET/EPIPE handling to test_asyncore. Patch
by Xavier de Gaye.
- Issue #13218: Fix test_ssl failures on Debian/Ubuntu.
- Re-enable lib2to3's test_parser.py tests, though with an expected failure
(see issue #13125).
- Issue #12656: Add tests for IPv6 and Unix sockets to test_asyncore.
- Issue #6484: Add unit tests for mailcap module (patch by Gregory Nofi)
- Issue #11651: Improve the Makefile test targets to run more of the test suite
more quickly. The --multiprocess option is now enabled by default, reducing
the amount of time needed to run the tests. "make test" and "make quicktest"
now include some resource-intensive tests, but no longer run the test suite
twice to check for bugs in .pyc generation. Tools/scripts/run_test.py provides
an easy platform-independent way to run test suite with sensible defaults.
- Issue #12331: The test suite for the packaging module can now run from an
installed Python.
- Issue #12331: The test suite for lib2to3 can now run from an installed
Python.
- Issue #12626: In regrtest, allow to filter tests using a glob filter
with the ``-m`` (or ``--match``) option. This works with all test cases
using the unittest module. This is useful with long test suites
such as test_io or test_subprocess.
- Issue #12624: It is now possible to fail after the first failure when
running in verbose mode (``-v`` or ``-W``), by using the ``--failfast``
(or ``-G``) option to regrtest. This is useful with long test suites
such as test_io or test_subprocess.
- Issue #12587: Correct faulty test file and reference in test_tokenize.
(Patch by Robert Xiao)
- Issue #12573: Add resource checks for dangling Thread and Process objects.
- Issue #12549: Correct test_platform to not fail when OS X returns 'x86_64'
as the processor type on some Mac systems.
- Skip network tests when getaddrinfo() returns EAI_AGAIN, meaning a temporary
failure in name resolution.
- Issue #11812: Solve transient socket failure to connect to 'localhost'
in test_telnetlib.py.
- Solved a potential deadlock in test_telnetlib.py. Related to issue #11812.
- Avoid failing in test_robotparser when mueblesmoraleda.com is flaky and
an overzealous DNS service (e.g. OpenDNS) redirects to a placeholder
Web site.
- Avoid failing in test_urllibnet.test_bad_address when some overzealous
DNS service (e.g. OpenDNS) resolves a non-existent domain name. The test
is now skipped instead.
- Issue #12440: When testing whether some bits in SSLContext.options can be
reset, check the version of the OpenSSL headers Python was compiled against,
rather than the runtime version of the OpenSSL library.
- Issue #11512: Add a test suite for the cgitb module. Patch by Robbie Clemons.
- Issue #12497: Install test/data to prevent failures of the various codecmaps
tests.
- Issue #12496: Install test/capath directory to prevent test_connect_capath
testcase failure in test_ssl.
- Issue #12469: Run wakeup and pending signal tests in a subprocess to run the
test in a fresh process with only one thread and to not change signal
handling of the parent process.
- Issue #8716: Avoid crashes caused by Aqua Tk on OSX when attempting to run
test_tk or test_ttk_guionly under a username that is not currently logged
in to the console windowserver (as may be the case under buildbot or ssh).
- Issue #12407: Explicitly skip test_capi.EmbeddingTest under Windows.
- Issue #12400: regrtest -W doesn't rerun the tests twice anymore, but captures
the output and displays it on failure instead. regrtest -v doesn't print the
error twice anymore if there is only one error.
- Issue #12141: Install copies of template C module file so that
test_build_ext of test_distutils and test_command_build_ext of
test_packaging are no longer silently skipped when
run outside of a build directory.
- Issue #8746: Add additional tests for os.chflags() and os.lchflags().
Patch by Garrett Cooper.
- Issue #10736: Fix test_ttk test_widgets failures with Cocoa Tk 8.5.9
2.8+ on Mac OS X. (Patch by Ronald Oussoren)
- Issue #12057: Add tests for ISO 2022 codecs (iso2022_jp, iso2022_jp_2,
iso2022_kr).
- Issue #12096: Fix a race condition in test_threading.test_waitfor(). Patch
written by Charles-François Natali.
- Issue #11614: import __hello__ prints "Hello World!". Patch written by
Andreas Stührk.
- Issue #5723: Improve json tests to be executed with and without accelerations.
- Issue #12041: Make test_wait3 more robust.
- Issue #11873: Change regex in test_compileall to fix occasional failures when
when the randomly generated temporary path happened to match the regex.
- Issue #11958: Fix FTP tests for IPv6, bind to "::1" instead of "localhost".
Patch written by Charles-Francois Natali.
- Issue #8407, #11859: Fix tests of test_io using threads and an alarm: use
pthread_sigmask() to ensure that the SIGALRM signal is received by the main
thread.
- Issue #11811: Factor out detection of IPv6 support on the current host
and make it available as ``test.support.IPV6_ENABLED``. Patch by
Charles-François Natali.
- Issue #10914: Add a minimal embedding test to test_capi.
- Issue #11223: Skip test_lock_acquire_interruption() and
test_rlock_acquire_interruption() of test_threadsignals if a thread lock is
implemented using a POSIX mutex and a POSIX condition variable. A POSIX
condition variable cannot be interrupted by a signal (e.g. on Linux, the
futex system call is restarted).
- Issue #11790: Fix sporadic failures in test_multiprocessing.WithProcessesTestCondition.
- Fix possible "file already exists" error when running the tests in parallel.
- Issue #11719: Fix message about unexpected test_msilib skip on non-Windows
platforms. Patch by Nadeem Vawda.
- Issue #11727: Add a --timeout option to regrtest: if a test takes more than
TIMEOUT seconds, dumps the traceback of all threads and exits.
- Issue #11653: fix -W with -j in regrtest.
- The email test suite now lives in the Lib/test/test_email package. The test
harness code has also been modernized to allow use of new unittest features.
- regrtest now discovers test packages as well as test modules.
- Issue #11577: improve test coverage of binhex.py. Patch by Arkady Koplyarov.
- New test_crashers added to exercise the scripts in the Lib/test/crashers
directory and confirm they fail as expected
- Issue #11578: added test for the timeit module. Patch by Michael Henry.
- Issue #11503: improve test coverage of posixpath.py. Patch by Evan Dandrea.
- Issue #11505: improves test coverage of string.py, increases granularity of
string.Formatter tests. Initial patch by Alicia Arlen.
- Issue #11548: Improve test coverage of the shutil module. Patch by
Evan Dandrea.
- Issue #11554: Reactivated test_email_codecs.
- Issue #11505: improves test coverage of string.py. Patch by Alicia
Arlen
- Issue #11490: test_subprocess.test_leaking_fds_on_error no longer gives a
false positive if the last directory in the path is inaccessible.
- Issue #11223: Fix test_threadsignals to fail, not hang, when the
non-semaphore implementation of locks is used under POSIX.
- Issue #10911: Add tests on CGI with non-ASCII characters. Patch written by
Pierre Quentel.
- Issue #9931: Fix hangs in GUI tests under Windows in certain conditions.
Patch by Hirokazu Yamamoto.
- Issue #10512: Properly close sockets under test.test_cgi.
- Issue #10992: Make tests pass under coverage.
- Issue #10826: Prevent sporadic failure in test_subprocess on Solaris due
to open door files.
- Issue #10990: Prevent tests from clobbering a set trace function.
C-API
-----
- Issue #13452: PyUnicode_EncodeDecimal() doesn't support error handlers
different than "strict" anymore. The caller was unable to compute the
size of the output buffer: it depends on the error handler.
- Issue #13560: Add PyUnicode_DecodeLocale(), PyUnicode_DecodeLocaleAndSize()
and PyUnicode_EncodeLocale() functions to the C API to decode/encode from/to
the current locale encoding.
- Issue #10831: PyUnicode_FromFormat() supports %li, %lli and %zi formats.
- Issue #11246: Fix PyUnicode_FromFormat("%V") to decode the byte string from
UTF-8 (with replace error handler) instead of ISO-8859-1 (in strict mode).
Patch written by Ray Allen.
- Issue #10830: Fix PyUnicode_FromFormatV("%c") for non-BMP characters on
narrow build.
- Add PyObject_GenericGetDict and PyObject_GeneriSetDict. They are generic
implementations for the getter and setter of a ``__dict__`` descriptor of C
types.
- Issue #13727: Add 3 macros to access PyDateTime_Delta members:
PyDateTime_DELTA_GET_DAYS, PyDateTime_DELTA_GET_SECONDS,
PyDateTime_DELTA_GET_MICROSECONDS.
- Issue #10542: Add 4 macros to work with surrogates: Py_UNICODE_IS_SURROGATE,
Py_UNICODE_IS_HIGH_SURROGATE, Py_UNICODE_IS_LOW_SURROGATE,
Py_UNICODE_JOIN_SURROGATES.
- Issue #12724: Add Py_RETURN_NOTIMPLEMENTED macro for returning NotImplemented.
- PY_PATCHLEVEL_REVISION has been removed, since it's meaningless with
Mercurial.
- Issue #12173: The first argument of PyImport_ImportModuleLevel is now `const
char *` instead of `char *`.
- Issue #12380: PyArg_ParseTuple now accepts a bytearray for the 'c' format.
Documentation
-------------
- Issue #23006: Improve the documentation and indexing of dict.__missing__.
Add an entry in the language datamodel special methods section.
Revise and index its discussion in the stdtypes mapping/dict section.
- Issue #13989: Document that GzipFile does not support text mode, and give a
more helpful error message when opened with an invalid mode string.
- Issue #13921: Undocument and clean up sqlite3.OptimizedUnicode,
which is obsolete in Python 3.x. It's now aliased to str for
backwards compatibility.
- Issue #12102: Document that buffered files must be flushed before being used
with mmap. Patch by Steffen Daode Nurpmeso.
- Issue #8982: Improve the documentation for the argparse Namespace object.
- Issue #9343: Document that argparse parent parsers must be configured before
their children.
- Issue #13498: Clarify docs of os.makedirs()'s exist_ok argument. Done with
great native-speaker help from R. David Murray.
- Issues #13491 and #13995: Fix many errors in sqlite3 documentation.
Initial patch for #13491 by Johannes Vogel.
- Issue #13402: Document absoluteness of sys.executable.
- Issue #13883: PYTHONCASEOK also works on OS X.
- Issue #9021: Add an introduction to the copy module documentation.
- Issue #6005: Examples in the socket library documentation use sendall, where
relevant, instead send method.
- Issue #12798: Updated the mimetypes documentation.
- Issue #12949: Document the kwonlyargcount argument for the PyCode_New
C API function.
- Issue #13513: Fix io.IOBase documentation to correctly link to the
io.IOBase.readline method instead of the readline module.
- Issue #13237: Reorganise subprocess documentation to emphasise convenience
functions and the most commonly needed arguments to Popen.
- Issue #13141: Demonstrate recommended style for socketserver examples.
- Issue #11818: Fix tempfile examples for Python 3.
**(For information about older versions, consult the HISTORY file.)**
|