Package SCons :: Package compat :: Module _scons_builtins
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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          sorted() 
 41          memoryview() 
 42   
 43  Implementations of functions are *NOT* guaranteed to be fully compliant 
 44  with these functions in later versions of Python.  We are only concerned 
 45  with adding functionality that we actually use in SCons, so be wary 
 46  if you lift this code for other uses.  (That said, making these more 
 47  nearly the same as later, official versions is still a desirable goal, 
 48  we just don't need to be obsessive about it.) 
 49   
 50  If you're looking at this with pydoc and various names don't show up in 
 51  the FUNCTIONS or DATA output, that means those names are already built in 
 52  to this version of Python and we don't need to add them from this module. 
 53  """ 
 54   
 55  __revision__ = "src/engine/SCons/compat/_scons_builtins.py 5023 2010/06/14 22:05:46 scons" 
 56   
 57  import builtins 
 58   
 59  try: 
 60      all 
 61  except NameError: 
 62      # Pre-2.5 Python has no all() function. 
63 - def all(iterable):
64 """ 65 Returns True if all elements of the iterable are true. 66 """ 67 for element in iterable: 68 if not element: 69 return False 70 return True
71 builtins.all = all 72 all = all 73 74 try: 75 any 76 except NameError: 77 # Pre-2.5 Python has no any() function.
78 - def any(iterable):
79 """ 80 Returns True if any element of the iterable is true. 81 """ 82 for element in iterable: 83 if element: 84 return True 85 return False
86 builtins.any = any 87 any = any 88 89 try: 90 memoryview 91 except NameError: 92 # Pre-2.7 doesn't have the memoryview() built-in.
93 - class memoryview(object):
94 - def __init__(self, obj):
95 # wrapping buffer in () keeps the fixer from changing it 96 self.obj = (buffer)(obj)
97 - def __getitem__(self, indx):
98 if isinstance(indx, slice): 99 return self.obj[indx.start:indx.stop] 100 else: 101 return self.obj[indx]
102 builtins.memoryview = memoryview 103 104 try: 105 sorted 106 except NameError: 107 # Pre-2.4 Python has no sorted() function. 108 # 109 # The pre-2.4 Python list.sort() method does not support 110 # list.sort(key=) nor list.sort(reverse=) keyword arguments, so 111 # we must implement the functionality of those keyword arguments 112 # by hand instead of passing them to list.sort().
113 - def sorted(iterable, cmp=None, key=None, reverse=False):
114 if key is not None: 115 result = [(key(x), x) for x in iterable] 116 else: 117 result = iterable[:] 118 if cmp is None: 119 # Pre-2.3 Python does not support list.sort(None). 120 result.sort() 121 else: 122 result.sort(cmp) 123 if key is not None: 124 result = [t1 for t0,t1 in result] 125 if reverse: 126 result.reverse() 127 return result
128 builtins.sorted = sorted 129 130 #if sys.version_info[:3] in ((2, 2, 0), (2, 2, 1)): 131 # def lstrip(s, c=string.whitespace): 132 # while s and s[0] in c: 133 # s = s[1:] 134 # return s 135 # def rstrip(s, c=string.whitespace): 136 # while s and s[-1] in c: 137 # s = s[:-1] 138 # return s 139 # def strip(s, c=string.whitespace, l=lstrip, r=rstrip): 140 # return l(r(s, c), c) 141 # 142 # object.__setattr__(str, 'lstrip', lstrip) 143 # object.__setattr__(str, 'rstrip', rstrip) 144 # object.__setattr__(str, 'strip', strip) 145 146 # Local Variables: 147 # tab-width:4 148 # indent-tabs-mode:nil 149 # End: 150 # vim: set expandtab tabstop=4 shiftwidth=4: 151