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authorThomas Wouters <thomas@python.org>2007-02-23 15:07:44 (GMT)
committerThomas Wouters <thomas@python.org>2007-02-23 15:07:44 (GMT)
commitcf297e46b85257396560774e5492e9d71a40f32e (patch)
tree1dcf4bb9f75f4d2baacccd49b7dec711d5004a06 /Lib/heapq.py
parent63eecc7eee12e473701c834592db00ff1bf43423 (diff)
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Merged revisions 53623-53858 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk ........ r53624 | peter.astrand | 2007-02-02 20:06:36 +0100 (Fri, 02 Feb 2007) | 1 line We had several if statements checking the value of a fd. This is unsafe, since valid fds might be zero. We should check for not None instead. ........ r53635 | kurt.kaiser | 2007-02-05 07:03:18 +0100 (Mon, 05 Feb 2007) | 2 lines Add 'raw' support to configHandler. Patch 1650174 Tal Einat. ........ r53641 | kurt.kaiser | 2007-02-06 00:02:16 +0100 (Tue, 06 Feb 2007) | 5 lines 1. Calltips now 'handle' tuples in the argument list (display '<tuple>' :) Suggested solution by Christos Georgiou, Bug 791968. 2. Clean up tests, were not failing when they should have been. 4. Remove some camelcase and an unneeded try/except block. ........ r53644 | kurt.kaiser | 2007-02-06 04:21:40 +0100 (Tue, 06 Feb 2007) | 2 lines Clean up ModifiedInterpreter.runcode() structure ........ r53646 | peter.astrand | 2007-02-06 16:37:50 +0100 (Tue, 06 Feb 2007) | 1 line Applied patch 1124861.3.patch to solve bug #1124861: Automatically create pipes on Windows, if GetStdHandle fails. Will backport. ........ r53648 | lars.gustaebel | 2007-02-06 19:38:13 +0100 (Tue, 06 Feb 2007) | 4 lines Patch #1652681: create nonexistent files in append mode and allow appending to empty files. ........ r53649 | kurt.kaiser | 2007-02-06 20:09:43 +0100 (Tue, 06 Feb 2007) | 4 lines Updated patch (CodeContext.061217.patch) to [ 1362975 ] CodeContext - Improved text indentation Tal Einat 16Dec06 ........ r53650 | kurt.kaiser | 2007-02-06 20:21:19 +0100 (Tue, 06 Feb 2007) | 2 lines narrow exception per [ 1540849 ] except too broad ........ r53653 | kurt.kaiser | 2007-02-07 04:39:41 +0100 (Wed, 07 Feb 2007) | 4 lines [ 1621265 ] Auto-completion list placement Move AC window below input line unless not enough space, then put it above. Patch: Tal Einat ........ r53654 | kurt.kaiser | 2007-02-07 09:07:13 +0100 (Wed, 07 Feb 2007) | 2 lines Handle AttributeError during calltip lookup ........ r53656 | raymond.hettinger | 2007-02-07 21:08:22 +0100 (Wed, 07 Feb 2007) | 3 lines SF #1615701: make d.update(m) honor __getitem__() and keys() in dict subclasses ........ r53658 | raymond.hettinger | 2007-02-07 22:04:20 +0100 (Wed, 07 Feb 2007) | 1 line SF: 1397711 Set docs conflated immutable and hashable ........ r53660 | raymond.hettinger | 2007-02-07 22:42:17 +0100 (Wed, 07 Feb 2007) | 1 line Check for a common user error with defaultdict(). ........ r53662 | raymond.hettinger | 2007-02-07 23:24:07 +0100 (Wed, 07 Feb 2007) | 1 line Bug #1575169: operator.isSequenceType() now returns False for subclasses of dict. ........ r53664 | raymond.hettinger | 2007-02-08 00:49:03 +0100 (Thu, 08 Feb 2007) | 1 line Silence compiler warning ........ r53666 | raymond.hettinger | 2007-02-08 01:07:32 +0100 (Thu, 08 Feb 2007) | 1 line Do not let overflows in enumerate() and count() pass silently. ........ r53668 | raymond.hettinger | 2007-02-08 01:50:39 +0100 (Thu, 08 Feb 2007) | 1 line Bypass set specific optimizations for set and frozenset subclasses. ........ r53670 | raymond.hettinger | 2007-02-08 02:42:35 +0100 (Thu, 08 Feb 2007) | 1 line Fix docstring bug ........ r53671 | martin.v.loewis | 2007-02-08 10:13:36 +0100 (Thu, 08 Feb 2007) | 3 lines Bug #1653736: Complain about keyword arguments to time.isoformat. Will backport to 2.5. ........ r53679 | kurt.kaiser | 2007-02-08 23:58:18 +0100 (Thu, 08 Feb 2007) | 6 lines Corrected some bugs in AutoComplete. Also, Page Up/Down in ACW implemented; mouse and cursor selection in ACWindow implemented; double Tab inserts current selection and closes ACW (similar to double-click and Return); scroll wheel now works in ACW. Added AutoComplete instructions to IDLE Help. ........ r53689 | martin.v.loewis | 2007-02-09 13:19:32 +0100 (Fri, 09 Feb 2007) | 3 lines Bug #1653736: Properly discard third argument to slot_nb_inplace_power. Will backport. ........ r53691 | martin.v.loewis | 2007-02-09 13:36:48 +0100 (Fri, 09 Feb 2007) | 4 lines Bug #1600860: Search for shared python library in LIBDIR, not lib/python/config, on "linux" and "gnu" systems. Will backport. ........ r53693 | martin.v.loewis | 2007-02-09 13:58:49 +0100 (Fri, 09 Feb 2007) | 2 lines Update broken link. Will backport to 2.5. ........ r53697 | georg.brandl | 2007-02-09 19:48:41 +0100 (Fri, 09 Feb 2007) | 2 lines Bug #1656078: typo in in profile docs. ........ r53731 | brett.cannon | 2007-02-11 06:36:00 +0100 (Sun, 11 Feb 2007) | 3 lines Change a very minor inconsistency (that is purely cosmetic) in the AST definition. ........ r53735 | skip.montanaro | 2007-02-11 19:24:37 +0100 (Sun, 11 Feb 2007) | 1 line fix trace.py --ignore-dir ........ r53741 | brett.cannon | 2007-02-11 20:44:41 +0100 (Sun, 11 Feb 2007) | 3 lines Check in changed Python-ast.c from a cosmetic change to Python.asdl (in r53731). ........ r53751 | brett.cannon | 2007-02-12 04:51:02 +0100 (Mon, 12 Feb 2007) | 5 lines Modify Parser/asdl_c.py so that the __version__ number for Python/Python-ast.c is specified at the top of the file. Also add a note that Python/Python-ast.c needs to be committed separately after a change to the AST grammar to capture the revision number of the change (which is what __version__ is set to). ........ r53752 | lars.gustaebel | 2007-02-12 10:25:53 +0100 (Mon, 12 Feb 2007) | 3 lines Bug #1656581: Point out that external file objects are supposed to be at position 0. ........ r53754 | martin.v.loewis | 2007-02-12 13:21:10 +0100 (Mon, 12 Feb 2007) | 3 lines Patch 1463026: Support default namespace in XMLGenerator. Fixes #847665. Will backport. ........ r53757 | armin.rigo | 2007-02-12 17:23:24 +0100 (Mon, 12 Feb 2007) | 4 lines Fix the line to what is my guess at the original author's meaning. (The line has no effect anyway, but is present because it's customary call the base class __init__). ........ r53763 | martin.v.loewis | 2007-02-13 09:34:45 +0100 (Tue, 13 Feb 2007) | 3 lines Patch #685268: Consider a package's __path__ in imputil. Will backport. ........ r53765 | martin.v.loewis | 2007-02-13 10:49:38 +0100 (Tue, 13 Feb 2007) | 2 lines Patch #698833: Support file decryption in zipfile. ........ r53766 | martin.v.loewis | 2007-02-13 11:10:39 +0100 (Tue, 13 Feb 2007) | 3 lines Patch #1517891: Make 'a' create the file if it doesn't exist. Fixes #1514451. ........ r53767 | martin.v.loewis | 2007-02-13 13:08:24 +0100 (Tue, 13 Feb 2007) | 3 lines Bug #1658794: Remove extraneous 'this'. Will backport to 2.5. ........ r53769 | martin.v.loewis | 2007-02-13 13:14:19 +0100 (Tue, 13 Feb 2007) | 3 lines Patch #1657276: Make NETLINK_DNRTMSG conditional. Will backport. ........ r53771 | lars.gustaebel | 2007-02-13 17:09:24 +0100 (Tue, 13 Feb 2007) | 4 lines Patch #1647484: Renamed GzipFile's filename attribute to name. The filename attribute is still accessible as a property that emits a DeprecationWarning. ........ r53772 | lars.gustaebel | 2007-02-13 17:24:00 +0100 (Tue, 13 Feb 2007) | 3 lines Strip the '.gz' extension from the filename that is written to the gzip header. ........ r53774 | martin.v.loewis | 2007-02-14 11:07:37 +0100 (Wed, 14 Feb 2007) | 2 lines Patch #1432399: Add HCI sockets. ........ r53775 | martin.v.loewis | 2007-02-14 12:30:07 +0100 (Wed, 14 Feb 2007) | 2 lines Update 1432399 to removal of _BT_SOCKADDR_MEMB. ........ r53776 | martin.v.loewis | 2007-02-14 12:30:56 +0100 (Wed, 14 Feb 2007) | 3 lines Ignore directory time stamps when considering whether to rerun libffi configure. ........ r53778 | lars.gustaebel | 2007-02-14 15:45:12 +0100 (Wed, 14 Feb 2007) | 4 lines A missing binary mode in AppendTest caused failures in Windows Buildbot. ........ r53782 | martin.v.loewis | 2007-02-15 10:51:35 +0100 (Thu, 15 Feb 2007) | 2 lines Patch #1397848: add the reasoning behind no-resize-on-shrinkage. ........ r53783 | georg.brandl | 2007-02-15 11:37:59 +0100 (Thu, 15 Feb 2007) | 2 lines Make functools.wraps() docs a bit clearer. ........ r53785 | georg.brandl | 2007-02-15 12:29:04 +0100 (Thu, 15 Feb 2007) | 2 lines Patch #1494140: Add documentation for the new struct.Struct object. ........ r53787 | georg.brandl | 2007-02-15 12:29:55 +0100 (Thu, 15 Feb 2007) | 2 lines Add missing \versionadded. ........ r53800 | brett.cannon | 2007-02-15 23:54:39 +0100 (Thu, 15 Feb 2007) | 11 lines Update the encoding package's search function to use absolute imports when calling __import__. This helps make the expected search locations for encoding modules be more explicit. One could use an explicit value for __path__ when making the call to __import__ to force the exact location searched for encodings. This would give the most strict search path possible if one is worried about malicious code being imported. The unfortunate side-effect of that is that if __path__ was modified on 'encodings' on purpose in a safe way it would not be picked up in future __import__ calls. ........ r53801 | brett.cannon | 2007-02-16 20:33:01 +0100 (Fri, 16 Feb 2007) | 2 lines Make the __import__ call in encodings.__init__ absolute with a level 0 call. ........ r53809 | vinay.sajip | 2007-02-16 23:36:24 +0100 (Fri, 16 Feb 2007) | 1 line Minor fix for currentframe (SF #1652788). ........ r53818 | raymond.hettinger | 2007-02-19 03:03:19 +0100 (Mon, 19 Feb 2007) | 3 lines Extend work on revision 52962: Eliminate redundant calls to PyObject_Hash(). ........ r53820 | raymond.hettinger | 2007-02-19 05:08:43 +0100 (Mon, 19 Feb 2007) | 1 line Add merge() function to heapq. ........ r53821 | raymond.hettinger | 2007-02-19 06:28:28 +0100 (Mon, 19 Feb 2007) | 1 line Add tie-breaker count to preserve sort stability. ........ r53822 | raymond.hettinger | 2007-02-19 07:59:32 +0100 (Mon, 19 Feb 2007) | 1 line Use C heapreplace() instead of slower _siftup() in pure python. ........ r53823 | raymond.hettinger | 2007-02-19 08:30:21 +0100 (Mon, 19 Feb 2007) | 1 line Add test for merge stability ........ r53824 | raymond.hettinger | 2007-02-19 10:14:10 +0100 (Mon, 19 Feb 2007) | 1 line Provide an example of defaultdict with non-zero constant factory function. ........ r53825 | lars.gustaebel | 2007-02-19 10:54:47 +0100 (Mon, 19 Feb 2007) | 2 lines Moved misplaced news item. ........ r53826 | martin.v.loewis | 2007-02-19 11:55:19 +0100 (Mon, 19 Feb 2007) | 3 lines Patch #1490190: posixmodule now includes os.chflags() and os.lchflags() functions on platforms where the underlying system calls are available. ........ r53827 | raymond.hettinger | 2007-02-19 19:15:04 +0100 (Mon, 19 Feb 2007) | 1 line Fixup docstrings for merge(). ........ r53829 | raymond.hettinger | 2007-02-19 21:44:04 +0100 (Mon, 19 Feb 2007) | 1 line Fixup set/dict interoperability. ........ r53837 | raymond.hettinger | 2007-02-21 06:20:38 +0100 (Wed, 21 Feb 2007) | 1 line Add itertools.izip_longest(). ........ r53838 | raymond.hettinger | 2007-02-21 18:22:05 +0100 (Wed, 21 Feb 2007) | 1 line Remove filler struct item and fix leak. ........
Diffstat (limited to 'Lib/heapq.py')
-rw-r--r--Lib/heapq.py42
1 files changed, 40 insertions, 2 deletions
diff --git a/Lib/heapq.py b/Lib/heapq.py
index 9ab4c99..0168065 100644
--- a/Lib/heapq.py
+++ b/Lib/heapq.py
@@ -126,8 +126,8 @@ Believe me, real good tape sorts were quite spectacular to watch!
From all times, sorting has always been a Great Art! :-)
"""
-__all__ = ['heappush', 'heappop', 'heapify', 'heapreplace', 'nlargest',
- 'nsmallest']
+__all__ = ['heappush', 'heappop', 'heapify', 'heapreplace', 'merge',
+ 'nlargest', 'nsmallest']
from itertools import islice, repeat, count, imap, izip, tee
from operator import itemgetter, neg
@@ -308,6 +308,41 @@ try:
except ImportError:
pass
+def merge(*iterables):
+ '''Merge multiple sorted inputs into a single sorted output.
+
+ Similar to sorted(itertools.chain(*iterables)) but returns an iterable,
+ does not pull the data into memory all at once, and assumes that each of
+ the input streams is already sorted (smallest to largest).
+
+ >>> list(merge([1,3,5,7], [0,2,4,8], [5,10,15,20], [], [25]))
+ [0, 1, 2, 3, 4, 5, 5, 7, 8, 10, 15, 20, 25]
+
+ '''
+ _heappop, _heapreplace, _StopIteration = heappop, heapreplace, StopIteration
+
+ h = []
+ h_append = h.append
+ for itnum, it in enumerate(map(iter, iterables)):
+ try:
+ next = it.next
+ h_append([next(), itnum, next])
+ except _StopIteration:
+ pass
+ heapify(h)
+
+ while 1:
+ try:
+ while 1:
+ v, itnum, next = s = h[0] # raises IndexError when h is empty
+ yield v
+ s[0] = next() # raises StopIteration when exhausted
+ _heapreplace(h, s) # restore heap condition
+ except _StopIteration:
+ _heappop(h) # remove empty iterator
+ except IndexError:
+ return
+
# Extend the implementations of nsmallest and nlargest to use a key= argument
_nsmallest = nsmallest
def nsmallest(n, iterable, key=None):
@@ -341,3 +376,6 @@ if __name__ == "__main__":
while heap:
sort.append(heappop(heap))
print(sort)
+
+ import doctest
+ doctest.testmod()