Mercurial > cpython-lru_cache-weakref

annotate Lib/pdb.py @ 5817:48b94de85bf3 legacy-trunk

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Extensive changes by AMK.
author Guido van Rossum <guido@python.org>
date Thu, 17 Jul 1997 16:29:42 +0000
parents 03a57af72218
children 86c279a848eb
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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 # pdb.py -- finally, a Python debugger!
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4
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5 # (See pdb.doc for documentation.)
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6
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7 import string
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8 import sys
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9 import linecache
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10 import cmd
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11 import bdb
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12 import repr
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13
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14
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15 # Interaction prompt line will separate file and call info from code
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16 # text using value of line_prefix string. A newline and arrow may
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17 # be to your liking. You can set it once pdb is imported using the
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18 # command "pdb.line_prefix = '\n% '".
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19 # line_prefix = ': ' # Use this to get the old situation back
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20 line_prefix = '\n-> ' # Probably a better default
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21
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22 class Pdb(bdb.Bdb, cmd.Cmd):
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23
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24 def __init__(self):
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25 bdb.Bdb.__init__(self)
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26 cmd.Cmd.__init__(self)
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27 self.prompt = '(Pdb) '
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28
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29 def reset(self):
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30 bdb.Bdb.reset(self)
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31 self.forget()
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32
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33 def forget(self):
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34 self.lineno = None
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35 self.stack = []
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36 self.curindex = 0
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37 self.curframe = None
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38
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39 def setup(self, f, t):
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40 self.forget()
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41 self.stack, self.curindex = self.get_stack(f, t)
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42 self.curframe = self.stack[self.curindex][0]
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43
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44 # Override Bdb methods (except user_call, for now)
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45
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46 def user_line(self, frame):
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47 # This function is called when we stop or break at this line
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48 self.interaction(frame, None)
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49
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50 def user_return(self, frame, return_value):
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51 # This function is called when a return trap is set here
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52 frame.f_locals['__return__'] = return_value
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53 print '--Return--'
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54 self.interaction(frame, None)
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55
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56 def user_exception(self, frame, (exc_type, exc_value, exc_traceback)):
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57 # This function is called if an exception occurs,
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58 # but only if we are to stop at or just below this level
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59 frame.f_locals['__exception__'] = exc_type, exc_value
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60 if type(exc_type) == type(''):
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61 exc_type_name = exc_type
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62 else: exc_type_name = exc_type.__name__
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63 print exc_type_name + ':', repr.repr(exc_value)
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64 self.interaction(frame, exc_traceback)
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65
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66 # General interaction function
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67
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68 def interaction(self, frame, traceback):
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69 self.setup(frame, traceback)
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70 self.print_stack_entry(self.stack[self.curindex])
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71 self.cmdloop()
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72 self.forget()
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73
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74 def default(self, line):
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75 if line[:1] == '!': line = line[1:]
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76 locals = self.curframe.f_locals
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77 globals = self.curframe.f_globals
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78 globals['__privileged__'] = 1
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79 try:
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80 code = compile(line + '\n', '<stdin>', 'single')
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81 exec code in globals, locals
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82 except:
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83 if type(sys.exc_type) == type(''):
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84 exc_type_name = sys.exc_type
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85 else: exc_type_name = sys.exc_type.__name__
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86 print '***', exc_type_name + ':', sys.exc_value
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87
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88 # Command definitions, called by cmdloop()
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89 # The argument is the remaining string on the command line
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90 # Return true to exit from the command loop
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91
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92 do_h = cmd.Cmd.do_help
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93
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94 def do_break(self, arg):
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95 if not arg:
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96 print self.get_all_breaks() # XXX
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97 return
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98 # Try line number as argument
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99 try:
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100 arg = eval(arg, self.curframe.f_globals,
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101 self.curframe.f_locals)
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102 except:
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103 print '*** Could not eval argument:', arg
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104 return
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105
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106 # Check for condition
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107 try: arg, cond = arg
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108 except: arg, cond = arg, None
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109
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110 try:
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111 lineno = int(arg)
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112 filename = self.curframe.f_code.co_filename
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113 except:
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114 # Try function name as the argument
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115 import codehack
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116 try:
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117 func = arg
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118 if hasattr(func, 'im_func'):
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119 func = func.im_func
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120 code = func.func_code
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121 except:
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122 print '*** The specified object',
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123 print 'is not a function', arg
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124 return
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125 lineno = codehack.getlineno(code)
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126 filename = code.co_filename
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127
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128 # now set the break point
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129 err = self.set_break(filename, lineno, cond)
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130 if err: print '***', err
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131
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132 do_b = do_break
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133
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134 def do_clear(self, arg):
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135 if not arg:
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136 try:
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137 reply = raw_input('Clear all breaks? ')
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138 except EOFError:
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139 reply = 'no'
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140 reply = string.lower(string.strip(reply))
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141 if reply in ('y', 'yes'):
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142 self.clear_all_breaks()
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143 return
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144 try:
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145 lineno = int(eval(arg))
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146 except:
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147 print '*** Error in argument:', `arg`
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148 return
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149 filename = self.curframe.f_code.co_filename
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150 err = self.clear_break(filename, lineno)
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151 if err: print '***', err
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152 do_cl = do_clear # 'c' is already an abbreviation for 'continue'
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153
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154 def do_where(self, arg):
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155 self.print_stack_trace()
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156 do_w = do_where
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157
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158 def do_up(self, arg):
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159 if self.curindex == 0:
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160 print '*** Oldest frame'
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161 else:
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162 self.curindex = self.curindex - 1
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163 self.curframe = self.stack[self.curindex][0]
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164 self.print_stack_entry(self.stack[self.curindex])
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165 self.lineno = None
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166 do_u = do_up
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167
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168 def do_down(self, arg):
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169 if self.curindex + 1 == len(self.stack):
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170 print '*** Newest frame'
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171 else:
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172 self.curindex = self.curindex + 1
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173 self.curframe = self.stack[self.curindex][0]
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174 self.print_stack_entry(self.stack[self.curindex])
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175 self.lineno = None
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176 do_d = do_down
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177
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178 def do_step(self, arg):
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179 self.set_step()
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180 return 1
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181 do_s = do_step
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182
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183 def do_next(self, arg):
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184 self.set_next(self.curframe)
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185 return 1
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186 do_n = do_next
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187
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188 def do_return(self, arg):
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189 self.set_return(self.curframe)
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190 return 1
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191 do_r = do_return
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192
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193 def do_continue(self, arg):
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194 self.set_continue()
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195 return 1
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196 do_c = do_cont = do_continue
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197
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198 def do_quit(self, arg):
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199 self.set_quit()
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200 return 1
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201 do_q = do_quit
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202
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203 def do_args(self, arg):
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204 if self.curframe.f_locals.has_key('__args__'):
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205 print `self.curframe.f_locals['__args__']`
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206 else:
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207 print '*** No arguments?!'
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208 do_a = do_args
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209
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210 def do_retval(self, arg):
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211 if self.curframe.f_locals.has_key('__return__'):
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212 print self.curframe.f_locals['__return__']
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213 else:
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214 print '*** Not yet returned!'
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215 do_rv = do_retval
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216
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217 def do_p(self, arg):
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218 self.curframe.f_globals['__privileged__'] = 1
649
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diff changeset
219 try:
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220 value = eval(arg, self.curframe.f_globals, \
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221 self.curframe.f_locals)
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222 except:
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223 if type(sys.exc_type) == type(''):
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224 exc_type_name = sys.exc_type
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225 else: exc_type_name = sys.exc_type.__name__
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226 print '***', exc_type_name + ':', `sys.exc_value`
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227 return
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228
649
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229 print `value`
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230
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231 def do_list(self, arg):
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232 self.lastcmd = 'list'
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233 last = None
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234 if arg:
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235 try:
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236 x = eval(arg, {}, {})
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237 if type(x) == type(()):
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238 first, last = x
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239 first = int(first)
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240 last = int(last)
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241 if last < first:
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242 # Assume it's a count
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243 last = first + last
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244 else:
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245 first = max(1, int(x) - 5)
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246 except:
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247 print '*** Error in argument:', `arg`
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248 return
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249 elif self.lineno is None:
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250 first = max(1, self.curframe.f_lineno - 5)
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251 else:
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252 first = self.lineno + 1
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253 if last == None:
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254 last = first + 10
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255 filename = self.curframe.f_code.co_filename
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diff changeset
256 breaklist = self.get_file_breaks(filename)
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257 try:
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258 for lineno in range(first, last+1):
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259 line = linecache.getline(filename, lineno)
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260 if not line:
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261 print '[EOF]'
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262 break
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263 else:
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264 s = string.rjust(`lineno`, 3)
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265 if len(s) < 4: s = s + ' '
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266 if lineno in breaklist: s = s + 'B'
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267 else: s = s + ' '
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268 if lineno == self.curframe.f_lineno:
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269 s = s + '->'
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270 print s + '\t' + line,
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271 self.lineno = lineno
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272 except KeyboardInterrupt:
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273 pass
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274 do_l = do_list
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275
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276 def do_whatis(self, arg):
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diff changeset
277 try:
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278 value = eval(arg, self.curframe.f_globals, \
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279 self.curframe.f_locals)
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diff changeset
280 except:
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diff changeset
281 if type(sys.exc_type) == type(''):
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282 exc_type_name = sys.exc_type
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283 else: exc_type_name = sys.exc_type.__name__
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284 print '***', exc_type_name + ':', `sys.exc_value`
1261
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285 return
2c515f07367a Added whatis command (third try -- filesystem was full, rcs lock failed)
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286 code = None
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287 # Is it a function?
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288 try: code = value.func_code
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diff changeset
289 except: pass
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diff changeset
290 if code:
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291 print 'Function', code.co_name
1261
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292 return
2c515f07367a Added whatis command (third try -- filesystem was full, rcs lock failed)
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293 # Is it an instance method?
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294 try: code = value.im_func.func_code
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295 except: pass
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296 if code:
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297 print 'Method', code.co_name
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298 return
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299 # None of the above...
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300 print type(value)
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301
600
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302 # Print a traceback starting at the top stack frame.
649
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303 # The most recently entered frame is printed last;
600
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304 # this is different from dbx and gdb, but consistent with
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305 # the Python interpreter's stack trace.
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306 # It is also consistent with the up/down commands (which are
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307 # compatible with dbx and gdb: up moves towards 'main()'
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308 # and down moves towards the most recent stack frame).
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309
649
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310 def print_stack_trace(self):
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311 try:
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312 for frame_lineno in self.stack:
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313 self.print_stack_entry(frame_lineno)
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314 except KeyboardInterrupt:
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315 pass
600
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316
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317 def print_stack_entry(self, frame_lineno, prompt_prefix=line_prefix):
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318 frame, lineno = frame_lineno
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319 if frame is self.curframe:
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320 print '>',
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321 else:
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322 print ' ',
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323 print self.format_stack_entry(frame_lineno, prompt_prefix)
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324
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325
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326 # Help methods (derived from pdb.doc)
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327
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328 def help_help(self):
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329 self.help_h()
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330
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331 def help_h(self):
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332 print """h(elp)
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333 Without argument, print the list of available commands.
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334 With a command name as argument, print help about that command
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335 "help pdb" pipes the full documentation file to the $PAGER
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336 "help exec" gives help on the ! command"""
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337
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338 def help_where(self):
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339 self.help_w()
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340
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341 def help_w(self):
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342 print """w(here)
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343 Print a stack trace, with the most recent frame at the bottom.
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344 An arrow indicates the "current frame", which determines the
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345 context of most commands."""
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346
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347 def help_down(self):
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348 self.help_d()
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349
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350 def help_d(self):
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351 print """d(own)
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352 Move the current frame one level down in the stack trace
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353 (to an older frame)."""
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354
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355 def help_up(self):
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356 self.help_u()
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357
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358 def help_u(self):
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359 print """u(p)
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360 Move the current frame one level up in the stack trace
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361 (to a newer frame)."""
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362
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363 def help_break(self):
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364 self.help_b()
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365
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366 def help_b(self):
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367 print """b(reak) [lineno | function] [, "condition"]
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368 With a line number argument, set a break there in the current
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369 file. With a function name, set a break at the entry of that
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370 function. Without argument, list all breaks. If a second
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371 argument is present, it is a string specifying an expression
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372 which must evaluate to true before the breakpoint is honored.
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373 """
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374
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375 def help_clear(self):
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376 self.help_cl()
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377
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378 def help_cl(self):
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379 print """cl(ear) [lineno]
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380 With a line number argument, clear that break in the current file.
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381 Without argument, clear all breaks (but first ask confirmation)."""
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382
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383 def help_step(self):
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384 self.help_s()
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385
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386 def help_s(self):
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387 print """s(tep)
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388 Execute the current line, stop at the first possible occasion
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389 (either in a function that is called or in the current function)."""
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390
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391 def help_next(self):
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392 self.help_n()
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393
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394 def help_n(self):
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395 print """n(ext)
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396 Continue execution until the next line in the current function
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397 is reached or it returns."""
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398
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399 def help_return(self):
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400 self.help_r()
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401
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402 def help_r(self):
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403 print """r(eturn)
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404 Continue execution until the current function returns."""
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405
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406 def help_continue(self):
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407 self.help_c()
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408
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409 def help_cont(self):
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410 self.help_c()
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411
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412 def help_c(self):
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413 print """c(ont(inue))
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414 Continue execution, only stop when a breakpoint is encountered."""
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415
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416 def help_list(self):
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417 self.help_l()
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418
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419 def help_l(self):
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420 print """l(ist) [first [,last]]
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421 List source code for the current file.
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422 Without arguments, list 11 lines around the current line
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423 or continue the previous listing.
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424 With one argument, list 11 lines starting at that line.
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425 With two arguments, list the given range;
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426 if the second argument is less than the first, it is a count."""
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427
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428 def help_args(self):
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429 self.help_a()
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430
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431 def help_a(self):
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432 print """a(rgs)
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433 Print the argument list of the current function."""
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434
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435 def help_p(self):
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436 print """p expression
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437 Print the value of the expression."""
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438
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439 def help_exec(self):
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440 print """(!) statement
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441 Execute the (one-line) statement in the context of
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442 the current stack frame.
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443 The exclamation point can be omitted unless the first word
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444 of the statement resembles a debugger command.
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445 To assign to a global variable you must always prefix the
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446 command with a 'global' command, e.g.:
1940892d2fe3 Merge alpha100 branch back to main trunk
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447 (Pdb) global list_options; list_options = ['-l']
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448 (Pdb)"""
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449
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450 def help_quit(self):
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451 self.help_q()
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452
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453 def help_q(self):
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454 print """q(uit) Quit from the debugger.
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455 The program being executed is aborted."""
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456
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457 def help_pdb(self):
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458 help()
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459
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3dac204b74fa Added post_mortem() and pm() interfaces to pdb and wdb.
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460 # Simplified interface
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461
2437
62ebbcfea827 handle class exceptions; added runeval; made runctx obsolete
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462 def run(statement, globals=None, locals=None):
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463 Pdb().run(statement, globals, locals)
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464
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465 def runeval(expression, globals=None, locals=None):
62ebbcfea827 handle class exceptions; added runeval; made runctx obsolete
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466 return Pdb().runeval(expression, globals, locals)
600
d49b6a6725bd Moved documentation out to pdb.doc file.
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467
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468 def runctx(statement, globals, locals):
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469 # B/W compatibility
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470 run(statement, globals, locals)
600
d49b6a6725bd Moved documentation out to pdb.doc file.
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471
1006
903071377d29 Added a _v21 def to FL.py and added two new input field types
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472 def runcall(*args):
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473 return apply(Pdb().runcall, args)
1006
903071377d29 Added a _v21 def to FL.py and added two new input field types
Guido van Rossum <guido@python.org>
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474
1746
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475 def set_trace():
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476 Pdb().set_trace()
1041
3dac204b74fa Added post_mortem() and pm() interfaces to pdb and wdb.
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477
3dac204b74fa Added post_mortem() and pm() interfaces to pdb and wdb.
Guido van Rossum <guido@python.org>
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478 # Post-Mortem interface
3dac204b74fa Added post_mortem() and pm() interfaces to pdb and wdb.
Guido van Rossum <guido@python.org>
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479
3dac204b74fa Added post_mortem() and pm() interfaces to pdb and wdb.
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480 def post_mortem(t):
1317
ec312b647fcb pdb.py, bdb.py, cmd.py: use __init__() instead of init()
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481 p = Pdb()
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3dac204b74fa Added post_mortem() and pm() interfaces to pdb and wdb.
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482 p.reset()
3dac204b74fa Added post_mortem() and pm() interfaces to pdb and wdb.
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483 while t.tb_next <> None: t = t.tb_next
3dac204b74fa Added post_mortem() and pm() interfaces to pdb and wdb.
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484 p.interaction(t.tb_frame, t)
3dac204b74fa Added post_mortem() and pm() interfaces to pdb and wdb.
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485
3dac204b74fa Added post_mortem() and pm() interfaces to pdb and wdb.
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486 def pm():
3dac204b74fa Added post_mortem() and pm() interfaces to pdb and wdb.
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487 import sys
3dac204b74fa Added post_mortem() and pm() interfaces to pdb and wdb.
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488 post_mortem(sys.last_traceback)
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Guido van Rossum <guido@python.org>
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489
3dac204b74fa Added post_mortem() and pm() interfaces to pdb and wdb.
Guido van Rossum <guido@python.org>
parents: 1006
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490
3dac204b74fa Added post_mortem() and pm() interfaces to pdb and wdb.
Guido van Rossum <guido@python.org>
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491 # Main program for testing
3dac204b74fa Added post_mortem() and pm() interfaces to pdb and wdb.
Guido van Rossum <guido@python.org>
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492
649
da5b1433467c Rewritten to use bdb.Bdb as base class.
Guido van Rossum <guido@python.org>
parents: 601
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493 TESTCMD = 'import x; x.main()'
600
d49b6a6725bd Moved documentation out to pdb.doc file.
Guido van Rossum <guido@python.org>
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494
566
5a1f9ade1512 Initial revision
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495 def test():
649
da5b1433467c Rewritten to use bdb.Bdb as base class.
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496 run(TESTCMD)
1357
2fac209e1c3f * profile.py, pdb.py: added help() function
Guido van Rossum <guido@python.org>
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497
2fac209e1c3f * profile.py, pdb.py: added help() function
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498 # print help
2fac209e1c3f * profile.py, pdb.py: added help() function
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499 def help():
1358
3e33ca54fbdc Added missing "import os" to pdb.help()
Guido van Rossum <guido@python.org>
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500 import os
1357
2fac209e1c3f * profile.py, pdb.py: added help() function
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501 for dirname in sys.path:
2fac209e1c3f * profile.py, pdb.py: added help() function
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502 fullname = os.path.join(dirname, 'pdb.doc')
2fac209e1c3f * profile.py, pdb.py: added help() function
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503 if os.path.exists(fullname):
2fac209e1c3f * profile.py, pdb.py: added help() function
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504 sts = os.system('${PAGER-more} '+fullname)
2fac209e1c3f * profile.py, pdb.py: added help() function
Guido van Rossum <guido@python.org>
parents: 1331
diff changeset
505 if sts: print '*** Pager exit status:', sts
2fac209e1c3f * profile.py, pdb.py: added help() function
Guido van Rossum <guido@python.org>
parents: 1331
diff changeset
506 break
2fac209e1c3f * profile.py, pdb.py: added help() function
Guido van Rossum <guido@python.org>
parents: 1331
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507 else:
2fac209e1c3f * profile.py, pdb.py: added help() function
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parents: 1331
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508 print 'Sorry, can\'t find the help file "pdb.doc"',
2fac209e1c3f * profile.py, pdb.py: added help() function
Guido van Rossum <guido@python.org>
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509 print 'along the Python search path'
3822
db4ea3abf891 Two changes suggested by Andrew Kuchling:
Guido van Rossum <guido@python.org>
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diff changeset
510
db4ea3abf891 Two changes suggested by Andrew Kuchling:
Guido van Rossum <guido@python.org>
parents: 2922
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511 # When invoked as main program, invoke the debugger on a script
db4ea3abf891 Two changes suggested by Andrew Kuchling:
Guido van Rossum <guido@python.org>
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diff changeset
512 if __name__=='__main__':
db4ea3abf891 Two changes suggested by Andrew Kuchling:
Guido van Rossum <guido@python.org>
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diff changeset
513 import sys
4262
67d258edd3d9 Correct sys.path[0] when used stand-alone
Guido van Rossum <guido@python.org>
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diff changeset
514 import os
3822
db4ea3abf891 Two changes suggested by Andrew Kuchling:
Guido van Rossum <guido@python.org>
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diff changeset
515 if not sys.argv[1:]:
db4ea3abf891 Two changes suggested by Andrew Kuchling:
Guido van Rossum <guido@python.org>
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diff changeset
516 print "usage: pdb.py scriptfile [arg] ..."
db4ea3abf891 Two changes suggested by Andrew Kuchling:
Guido van Rossum <guido@python.org>
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diff changeset
517 sys.exit(2)
db4ea3abf891 Two changes suggested by Andrew Kuchling:
Guido van Rossum <guido@python.org>
parents: 2922
diff changeset
518
4262
67d258edd3d9 Correct sys.path[0] when used stand-alone
Guido van Rossum <guido@python.org>
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diff changeset
519 filename = sys.argv[1] # Get script filename
3822
db4ea3abf891 Two changes suggested by Andrew Kuchling:
Guido van Rossum <guido@python.org>
parents: 2922
diff changeset
520
4262
67d258edd3d9 Correct sys.path[0] when used stand-alone
Guido van Rossum <guido@python.org>
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diff changeset
521 del sys.argv[0] # Hide "pdb.py" from argument list
67d258edd3d9 Correct sys.path[0] when used stand-alone
Guido van Rossum <guido@python.org>
parents: 3822
diff changeset
522
67d258edd3d9 Correct sys.path[0] when used stand-alone
Guido van Rossum <guido@python.org>
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diff changeset
523 # Insert script directory in front of module search path
67d258edd3d9 Correct sys.path[0] when used stand-alone
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diff changeset
524 sys.path.insert(0, os.path.dirname(filename))
3822
db4ea3abf891 Two changes suggested by Andrew Kuchling:
Guido van Rossum <guido@python.org>
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diff changeset
525
db4ea3abf891 Two changes suggested by Andrew Kuchling:
Guido van Rossum <guido@python.org>
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diff changeset
526 run('execfile(' + `filename` + ')', {'__name__': '__main__'})