Source Code for Module SCons.compat._scons_builtins

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 23   
 24  # Portions of the following are derived from the compat.py file in 
 25  # Twisted, under the following copyright: 
 26  # 
 27  # Copyright (c) 2001-2004 Twisted Matrix Laboratories 
 28   
 29  __doc__ = """ 
 30  Compatibility idioms for builtins names 
 31   
 32  This module adds names to the builtins module for things that we want 
 33  to use in SCons but which don't show up until later Python versions than 
 34  the earliest ones we support. 
 35   
 36  This module checks for the following builtins names: 
 37   
 38          all() 
 39          any() 
 40          memoryview() 
 41   
 42  Implementations of functions are *NOT* guaranteed to be fully compliant 
 43  with these functions in later versions of Python.  We are only concerned 
 44  with adding functionality that we actually use in SCons, so be wary 
 45  if you lift this code for other uses.  (That said, making these more 
 46  nearly the same as later, official versions is still a desirable goal, 
 47  we just don't need to be obsessive about it.) 
 48   
 49  If you're looking at this with pydoc and various names don't show up in 
 50  the FUNCTIONS or DATA output, that means those names are already built in 
 51  to this version of Python and we don't need to add them from this module. 
 52  """ 
 53   
 54  __revision__ = "src/engine/SCons/compat/_scons_builtins.py  2013/03/03 09:48:35 garyo" 
 55   
 56  import builtins 
 57   
 58  try: 
 59      all 
 60  except NameError: 
 61      # Pre-2.5 Python has no all() function. 
 62 -    def all(iterable): 
 63          """ 
 64          Returns True if all elements of the iterable are true. 
 65          """ 
 66          for element in iterable: 
 67              if not element: 
 68                  return False 
 69          return True 
 70      builtins.all = all 
 71      all = all 
 72   
 73  try: 
 74      any 
 75  except NameError: 
 76      # Pre-2.5 Python has no any() function. 
 77 -    def any(iterable): 
 78          """ 
 79          Returns True if any element of the iterable is true. 
 80          """ 
 81          for element in iterable: 
 82              if element: 
 83                  return True 
 84          return False 
 85      builtins.any = any 
 86      any = any 
 87   
 88  try: 
 89      memoryview 
 90  except NameError: 
 91      # Pre-2.7 doesn't have the memoryview() built-in. 
 92 -    class memoryview(object): 
 93 -        def __init__(self, obj): 
 94              # wrapping buffer in () keeps the fixer from changing it 
 95              self.obj = (buffer)(obj) 
 96 -        def __getitem__(self, indx): 
 97              if isinstance(indx, slice): 
 98                  return self.obj[indx.start:indx.stop] 
 99              else: 
100                  return self.obj[indx] 
101      builtins.memoryview = memoryview 
102   
103  # Local Variables: 
104  # tab-width:4 
105  # indent-tabs-mode:nil 
106  # End: 
107  # vim: set expandtab tabstop=4 shiftwidth=4: 
108