Lib/types.py

   1 """
   2 Define names for built-in types that aren't directly accessible as a builtin.
   3 """
   4 import sys
   5
   6 # Iterators in Python aren't a matter of type but of protocol.  A large
   7 # and changing number of builtin types implement *some* flavor of
   8 # iterator.  Don't check the type!  Use hasattr to check for both
   9 # "__iter__" and "__next__" attributes instead.
  10
  11 def _f(): pass
  12 FunctionType = type(_f)
  13 LambdaType = type(lambda: None)         # Same as FunctionType
  14 CodeType = type(_f.__code__)
  15
  16 def _g():
  17     yield 1
  18 GeneratorType = type(_g())
  19
  20 class _C:
  21     def _m(self): pass
  22 MethodType = type(_C()._m)
  23
  24 BuiltinFunctionType = type(len)
  25 BuiltinMethodType = type([].append)     # Same as BuiltinFunctionType
  26
  27 ModuleType = type(sys)
  28
  29 try:
  30     raise TypeError
  31 except TypeError:
  32     tb = sys.exc_info()[2]
  33     TracebackType = type(tb)
  34     FrameType = type(tb.tb_frame)
  35     tb = None; del tb
  36
  37 # For Jython, the following two types are identical
  38 GetSetDescriptorType = type(FunctionType.__code__)
  39 MemberDescriptorType = type(FunctionType.__globals__)
  40
  41 del sys, _f, _g, _C,                              # Not for export