old_contents: #!/usr/bin/env python
  
  # Copyright (c) 2001, MetaSlash Inc.  All rights reserved.
  
  """
  Print out warnings from Python source files.
  """
  
  import sys
  import string
  import copy
  
  from pychecker import msgs
  from pychecker import Config
  from pychecker.Warning import Warning
  
  
  VAR_ARGS_BITS = 8
  MAX_ARGS_MASK = ((1 << VAR_ARGS_BITS) - 1)
  
  INIT = '__init__'
  LAMBDA = '<lambda>'
  
  # number of instructions to check backwards if it was a return
  BACK_RETURN_INDEX = 4
  
  
  _cfg = []
  
  def cfg() :
      return _cfg[-1]
  
  def initConfig(cfg) :
      _cfg.append(cfg)
  
  def pushConfig() :
      newCfg = copy.copy(cfg())
      _cfg.append(newCfg)
  
  def popConfig() :
      del _cfg[-1]
  
  
  def shouldUpdateArgs(operand) :
      return operand == Config.CHECKER_VAR
  
  def updateCheckerArgs(argStr, func, lastLineNum, warnings) :
      try :
          argList = string.split(argStr)
          # don't require long options to start w/--, we can add that for them
          for i in range(0, len(argList)) :
              if argList[i][0] != '-' :
                  argList[i] = '--' + argList[i]
  
          cfg().processArgs(argList)
          return 1
      except Config.UsageError, detail :
          warn = Warning(func, lastLineNum, msgs.INVALID_CHECKER_ARGS % detail)
          warnings.append(warn)
          return 0
                         
  
  def debug(*args) :
      if cfg().debug: print args
  
  
  PYTHON_1_5 = 0x10502
  PYTHON_2_0 = 0x20000
  PYTHON_2_1 = 0x20100
  PYTHON_2_2 = 0x20200
  
  def pythonVersion() :
      return sys.hexversion >> 8
  
  def startswith(s, substr) :
      "Ugh, supporting python 1.5 is a pain"
      return s[0:len(substr)] == substr
  
  def endswith(s, substr) :
      "Ugh, supporting python 1.5 is a pain"
      return s[-len(substr):] == substr
  
  
  # generic method that can be slapped into any class, thus the self parameter
  def std_repr(self) :
      return "<%s at 0x%x: %s>" % (self.__class__.__name__, id(self), str(self))
  
new_contents: #!/usr/bin/env python
  
  # Copyright (c) 2001, MetaSlash Inc.  All rights reserved.
  
  """
  Print out warnings from Python source files.
  """
  
  import sys
  import string
  import copy
  
  from pychecker import msgs
  from pychecker import Config
  from pychecker.Warning import Warning
  
  
  VAR_ARGS_BITS = 8
  MAX_ARGS_MASK = ((1 << VAR_ARGS_BITS) - 1)
  
  INIT = '__init__'
  LAMBDA = '<lambda>'
  
  # number of instructions to check backwards if it was a return
  BACK_RETURN_INDEX = 4
  
  
  _cfg = []
  
  def cfg() :
      return _cfg[-1]
  
  def initConfig(cfg) :
      _cfg.append(cfg)
  
  def pushConfig() :
      newCfg = copy.copy(cfg())
      _cfg.append(newCfg)
  
  def popConfig() :
      del _cfg[-1]
  
  
  def shouldUpdateArgs(operand) :
      return operand == Config.CHECKER_VAR
  
  def updateCheckerArgs(argStr, func, lastLineNum, warnings) :
      try :
          argList = string.split(argStr)
          # don't require long options to start w/--, we can add that for them
          for i in range(0, len(argList)) :
              if argList[i][0] != '-' :
                  argList[i] = '--' + argList[i]
  
          cfg().processArgs(argList)
          return 1
      except Config.UsageError, detail :
          warn = Warning(func, lastLineNum, msgs.INVALID_CHECKER_ARGS % detail)
          warnings.append(warn)
          return 0
                         
  
  def debug(*args) :
      if cfg().debug: print args
  
  
  PYTHON_1_5 = 0x10502
  PYTHON_2_0 = 0x20000
  PYTHON_2_1 = 0x20100
  PYTHON_2_2 = 0x20200
  PYTHON_2_3 = 0x20300
  PYTHON_2_4 = 0x20400
  
  def pythonVersion() :
      return sys.hexversion >> 8
  
  def startswith(s, substr) :
      "Ugh, supporting python 1.5 is a pain"
      return s[0:len(substr)] == substr
  
  def endswith(s, substr) :
      "Ugh, supporting python 1.5 is a pain"
      return s[-len(substr):] == substr
  
  
  # generic method that can be slapped into any class, thus the self parameter
  def std_repr(self) :
      return "<%s at 0x%x: %s>" % (self.__class__.__name__, id(self), str(self))
  
subject: add version info for py 2.3 and 2.4