Mercurial > cpython-lru_cache-weakref

annotate Tools/scripts/objgraph.py @ 49955:878d40468c4e legacy-trunk

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Issue #4384: Added logging integration with warnings module using captureWarnings(). This change includes a NullHandler which does nothing; it will be of use to library developers who want to avoid the "No handlers could be found for logger XXX" message which can appear if the library user doesn't configure logging.
author Vinay Sajip <vinay_sajip@yahoo.co.uk>
date Wed, 03 Dec 2008 23:22:58 +0000
parents 4727f260f6f8
children 46625e6122e9
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4573
73758db2f464 /usr/local/bin/python -> /usr/bin/env python
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1 #! /usr/bin/env python
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2
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3 # objgraph
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4 #
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5 # Read "nm -o" input (on IRIX: "nm -Bo") of a set of libraries or modules
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6 # and print various interesting listings, such as:
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7 #
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8 # - which names are used but not defined in the set (and used where),
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9 # - which names are defined in the set (and where),
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10 # - which modules use which other modules,
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11 # - which modules are used by which other modules.
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12 #
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13 # Usage: objgraph [-cdu] [file] ...
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14 # -c: print callers per objectfile
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15 # -d: print callees per objectfile
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16 # -u: print usage of undefined symbols
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17 # If none of -cdu is specified, all are assumed.
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18 # Use "nm -o" to generate the input (on IRIX: "nm -Bo"),
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19 # e.g.: nm -o /lib/libc.a | objgraph
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20
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21
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22 import sys
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23 import os
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24 import getopt
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25 import re
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26
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27 # Types of symbols.
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28 #
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29 definitions = 'TRGDSBAEC'
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30 externals = 'UV'
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31 ignore = 'Nntrgdsbavuc'
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32
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33 # Regular expression to parse "nm -o" output.
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34 #
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35 matcher = re.compile('(.*):\t?........ (.) (.*)$')
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36
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37 # Store "item" in "dict" under "key".
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38 # The dictionary maps keys to lists of items.
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39 # If there is no list for the key yet, it is created.
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40 #
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41 def store(dict, key, item):
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42 if dict.has_key(key):
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43 dict[key].append(item)
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44 else:
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45 dict[key] = [item]
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46
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47 # Return a flattened version of a list of strings: the concatenation
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48 # of its elements with intervening spaces.
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49 #
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50 def flat(list):
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51 s = ''
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52 for item in list:
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53 s = s + ' ' + item
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54 return s[1:]
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55
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56 # Global variables mapping defined/undefined names to files and back.
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57 #
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58 file2undef = {}
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59 def2file = {}
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60 file2def = {}
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61 undef2file = {}
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62
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63 # Read one input file and merge the data into the tables.
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64 # Argument is an open file.
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65 #
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66 def readinput(fp):
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67 while 1:
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68 s = fp.readline()
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69 if not s:
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70 break
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71 # If you get any output from this line,
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72 # it is probably caused by an unexpected input line:
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73 if matcher.search(s) < 0: s; continue # Shouldn't happen
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74 (ra, rb), (r1a, r1b), (r2a, r2b), (r3a, r3b) = matcher.regs[:4]
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75 fn, name, type = s[r1a:r1b], s[r3a:r3b], s[r2a:r2b]
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76 if type in definitions:
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77 store(def2file, name, fn)
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78 store(file2def, fn, name)
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79 elif type in externals:
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80 store(file2undef, fn, name)
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81 store(undef2file, name, fn)
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82 elif not type in ignore:
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83 print fn + ':' + name + ': unknown type ' + type
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84
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85 # Print all names that were undefined in some module and where they are
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86 # defined.
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87 #
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88 def printcallee():
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89 flist = file2undef.keys()
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90 flist.sort()
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91 for filename in flist:
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92 print filename + ':'
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93 elist = file2undef[filename]
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94 elist.sort()
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95 for ext in elist:
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96 if len(ext) >= 8:
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97 tabs = '\t'
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98 else:
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99 tabs = '\t\t'
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100 if not def2file.has_key(ext):
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101 print '\t' + ext + tabs + ' *undefined'
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102 else:
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103 print '\t' + ext + tabs + flat(def2file[ext])
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104
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105 # Print for each module the names of the other modules that use it.
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106 #
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107 def printcaller():
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108 files = file2def.keys()
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109 files.sort()
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110 for filename in files:
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111 callers = []
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112 for label in file2def[filename]:
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113 if undef2file.has_key(label):
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114 callers = callers + undef2file[label]
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115 if callers:
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116 callers.sort()
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117 print filename + ':'
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118 lastfn = ''
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119 for fn in callers:
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120 if fn <> lastfn:
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121 print '\t' + fn
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122 lastfn = fn
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123 else:
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124 print filename + ': unused'
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125
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126 # Print undefined names and where they are used.
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127 #
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128 def printundef():
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129 undefs = {}
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130 for filename in file2undef.keys():
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131 for ext in file2undef[filename]:
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132 if not def2file.has_key(ext):
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133 store(undefs, ext, filename)
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134 elist = undefs.keys()
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135 elist.sort()
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136 for ext in elist:
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137 print ext + ':'
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138 flist = undefs[ext]
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139 flist.sort()
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140 for filename in flist:
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141 print '\t' + filename
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142
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143 # Print warning messages about names defined in more than one file.
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144 #
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145 def warndups():
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146 savestdout = sys.stdout
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147 sys.stdout = sys.stderr
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148 names = def2file.keys()
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149 names.sort()
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150 for name in names:
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151 if len(def2file[name]) > 1:
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152 print 'warning:', name, 'multiply defined:',
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153 print flat(def2file[name])
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154 sys.stdout = savestdout
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155
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156 # Main program
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157 #
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158 def main():
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159 try:
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160 optlist, args = getopt.getopt(sys.argv[1:], 'cdu')
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161 except getopt.error:
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162 sys.stdout = sys.stderr
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163 print 'Usage:', os.path.basename(sys.argv[0]),
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164 print '[-cdu] [file] ...'
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165 print '-c: print callers per objectfile'
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166 print '-d: print callees per objectfile'
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167 print '-u: print usage of undefined symbols'
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168 print 'If none of -cdu is specified, all are assumed.'
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169 print 'Use "nm -o" to generate the input (on IRIX: "nm -Bo"),'
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170 print 'e.g.: nm -o /lib/libc.a | objgraph'
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171 return 1
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172 optu = optc = optd = 0
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173 for opt, void in optlist:
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174 if opt == '-u':
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175 optu = 1
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176 elif opt == '-c':
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177 optc = 1
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178 elif opt == '-d':
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179 optd = 1
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180 if optu == optc == optd == 0:
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181 optu = optc = optd = 1
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182 if not args:
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183 args = ['-']
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93c92f20b6bf Fix use of 'file' as a variable name.
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184 for filename in args:
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185 if filename == '-':
15930
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186 readinput(sys.stdin)
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187 else:
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188 readinput(open(filename, 'r'))
15930
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189 #
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190 warndups()
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191 #
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192 more = (optu + optc + optd > 1)
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193 if optd:
14a27acc755a Whitespace normalization.
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194 if more:
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195 print '---------------All callees------------------'
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196 printcallee()
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197 if optu:
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198 if more:
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199 print '---------------Undefined callees------------'
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200 printundef()
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201 if optc:
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202 if more:
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203 print '---------------All Callers------------------'
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204 printcaller()
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205 return 0
274
12a64115a4ee Initial revision
Guido van Rossum <guido@python.org>
parents:
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206
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207 # Call the main program.
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208 # Use its return value as exit status.
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209 # Catch interrupts to avoid stack trace.
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210 #
33074
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211 if __name__ == '__main__':
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212 try:
981fff7363b9 [Patch #1005491 ] use __name__ == '__main__' in scripts
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213 sys.exit(main())
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214 except KeyboardInterrupt:
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215 sys.exit(1)