Lib/types.py

   1 """Define names for all type symbols known in the standard interpreter.
   2
   3 Types that are part of optional modules (e.g. array) are not listed.
   4 """
   5 from __future__ import generators
   6
   7 import sys
   8
   9 # Iterators in Python aren't a matter of type but of protocol.  A large
  10 # and changing number of builtin types implement *some* flavor of
  11 # iterator.  Don't check the type!  Use hasattr to check for both
  12 # "__iter__" and "next" attributes instead.
  13
  14 NoneType = type(None)
  15 TypeType = type
  16 ObjectType = object
  17
  18 IntType = int
  19 LongType = long
  20 FloatType = float
  21 try:
  22     ComplexType = complex
  23 except NameError:
  24     pass
  25
  26 StringType = str
  27 try:
  28     UnicodeType = unicode
  29     StringTypes = (StringType, UnicodeType)
  30 except NameError:
  31     StringTypes = (StringType,)
  32
  33 BufferType = type(buffer(''))
  34
  35 TupleType = tuple
  36 ListType = list
  37 DictType = DictionaryType = dict
  38
  39 def _f(): pass
  40 FunctionType = type(_f)
  41 LambdaType = type(lambda: None)         # Same as FunctionType
  42 try:
  43     CodeType = type(_f.func_code)
  44 except RuntimeError:
  45     # Execution in restricted environment
  46     pass
  47
  48 def g():
  49     yield 1
  50 GeneratorType = type(g())
  51 del g
  52
  53 class _C:
  54     def _m(self): pass
  55 ClassType = type(_C)
  56 UnboundMethodType = type(_C._m)         # Same as MethodType
  57 _x = _C()
  58 InstanceType = type(_x)
  59 MethodType = type(_x._m)
  60
  61 BuiltinFunctionType = type(len)
  62 BuiltinMethodType = type([].append)     # Same as BuiltinFunctionType
  63
  64 ModuleType = type(sys)
  65 FileType = file
  66 XRangeType = type(xrange(0))
  67
  68 try:
  69     raise TypeError
  70 except TypeError:
  71     try:
  72         tb = sys.exc_info()[2]
  73         TracebackType = type(tb)
  74         FrameType = type(tb.tb_frame)
  75     except AttributeError:
  76         # In the restricted environment, exc_info returns (None, None,
  77         # None) Then, tb.tb_frame gives an attribute error
  78         pass
  79     tb = None; del tb
  80
  81 SliceType = type(slice(0))
  82 EllipsisType = type(Ellipsis)
  83
  84 DictProxyType = type(TypeType.__dict__)
  85
  86 del sys, _f, _C, _x, generators                  # Not for export