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
|
# Print tracebacks, with a dump of local variables.
# Also an interactive stack trace browser.
import sys
try:
import mac
os = mac
except ImportError:
import posix
os = posix
from stat import *
import string
def br(): browser(sys.last_traceback)
def tb(): printtb(sys.last_traceback)
def browser(tb):
if not tb:
print 'No traceback.'
return
tblist = []
while tb:
tblist.append(tb)
tb = tb.tb_next
ptr = len(tblist)-1
tb = tblist[ptr]
while 1:
if tb <> tblist[ptr]:
tb = tblist[ptr]
print `ptr` + ':',
printtbheader(tb)
try:
line = raw_input('TB: ')
except KeyboardInterrupt:
print '\n[Interrupted]'
break
except EOFError:
print '\n[EOF]'
break
cmd = string.strip(line)
if cmd:
if cmd == 'quit':
break
elif cmd == 'list':
browserlist(tb)
elif cmd == 'up':
if ptr-1 >= 0: ptr = ptr-1
else: print 'Bottom of stack.'
elif cmd == 'down':
if ptr+1 < len(tblist): ptr = ptr+1
else: print 'Top of stack.'
elif cmd == 'locals':
printsymbols(tb.tb_frame.f_locals)
elif cmd == 'globals':
printsymbols(tb.tb_frame.f_globals)
elif cmd in ('?', 'help'):
browserhelp()
else:
browserexec(tb, cmd)
def browserlist(tb):
filename = tb.tb_frame.f_code.co_filename
lineno = tb.tb_lineno
last = lineno
first = max(1, last-10)
for i in range(first, last+1):
if i == lineno: prefix = '***' + string.rjust(`i`, 4) + ':'
else: prefix = string.rjust(`i`, 7) + ':'
line = readfileline(filename, i)
if line[-1:] == '\n': line = line[:-1]
print prefix + line
def browserexec(tb, cmd):
locals = tb.tb_frame.f_locals
globals = tb.tb_frame.f_globals
try:
exec(cmd+'\n', globals, locals)
except:
print '*** Exception:',
print sys.exc_type,
if sys.exc_value <> None:
print ':', sys.exc_value,
print
print 'Type help to get help.'
def browserhelp():
print
print ' This is the traceback browser. Commands are:'
print ' up : move one level up in the call stack'
print ' down : move one level down in the call stack'
print ' locals : print all local variables at this level'
print ' globals : print all global variables at this level'
print ' list : list source code around the failure'
print ' help : print help (what you are reading now)'
print ' quit : back to command interpreter'
print ' Typing any other 1-line statement will execute it'
print ' using the current level\'s symbol tables'
print
def printtb(tb):
while tb:
print1tb(tb)
tb = tb.tb_next
def print1tb(tb):
printtbheader(tb)
if tb.tb_frame.f_locals is not tb.tb_frame.f_globals:
printsymbols(tb.tb_frame.f_locals)
def printtbheader(tb):
filename = tb.tb_frame.f_code.co_filename
lineno = tb.tb_lineno
info = '"' + filename + '"(' + `lineno` + ')'
line = readfileline(filename, lineno)
if line:
info = info + ': ' + string.strip(line)
print info
def printsymbols(d):
keys = d.keys()
keys.sort()
for name in keys:
print ' ' + string.ljust(name, 12) + ':',
printobject(d[name], 4)
print
def printobject(v, maxlevel):
if v == None:
print 'None',
elif type(v) in (type(0), type(0.0)):
print v,
elif type(v) == type(''):
if len(v) > 20:
print `v[:17] + '...'`,
else:
print `v`,
elif type(v) == type(()):
print '(',
printlist(v, maxlevel)
print ')',
elif type(v) == type([]):
print '[',
printlist(v, maxlevel)
print ']',
elif type(v) == type({}):
print '{',
printdict(v, maxlevel)
print '}',
else:
print v,
def printlist(v, maxlevel):
n = len(v)
if n == 0: return
if maxlevel <= 0:
print '...',
return
for i in range(min(6, n)):
printobject(v[i], maxlevel-1)
if i+1 < n: print ',',
if n > 6: print '...',
def printdict(v, maxlevel):
keys = v.keys()
n = len(keys)
if n == 0: return
if maxlevel <= 0:
print '...',
return
keys.sort()
for i in range(min(6, n)):
key = keys[i]
print `key` + ':',
printobject(v[key], maxlevel-1)
if i+1 < n: print ',',
if n > 6: print '...',
_filecache = {}
def readfileline(filename, lineno):
try:
stat = os.stat(filename)
except os.error, msg:
print 'Cannot stat', filename, '--', msg
return ''
cache_ok = 0
if _filecache.has_key(filename):
cached_stat, lines = _filecache[filename]
if stat[ST_SIZE] == cached_stat[ST_SIZE] and \
stat[ST_MTIME] == cached_stat[ST_MTIME]:
cache_ok = 1
else:
print 'Stale cache entry for', filename
del _filecache[filename]
if not cache_ok:
lines = readfilelines(filename)
if not lines:
return ''
_filecache[filename] = stat, lines
if 0 <= lineno-1 < len(lines):
return lines[lineno-1]
else:
print 'Line number out of range, last line is', len(lines)
return ''
def readfilelines(filename):
try:
fp = open(filename, 'r')
except:
print 'Cannot open', filename
return []
lines = []
while 1:
line = fp.readline()
if not line: break
lines.append(line)
if not lines:
print 'Empty file', filename
return lines
|
