cpython/Lib/types.py

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"""Define names for all type symbols known in the standard interpreter.
Types that are part of optional modules (e.g. array) are not listed.
"""
import sys
# Iterators in Python aren't a matter of type but of protocol. A large
# and changing number of builtin types implement *some* flavor of
# iterator. Don't check the type! Use hasattr to check for both
# "__iter__" and "next" attributes instead.
NoneType = type(None)
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TypeType = type
ObjectType = object
IntType = int
LongType = long
FloatType = float
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try:
ComplexType = complex
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except NameError:
pass
StringType = str
try:
UnicodeType = unicode
StringTypes = (StringType, UnicodeType)
except NameError:
StringTypes = (StringType,)
BufferType = type(buffer(''))
TupleType = tuple
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ListType = list
DictType = DictionaryType = dict
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def _f(): pass
FunctionType = type(_f)
LambdaType = type(lambda: None) # Same as FunctionType
try:
CodeType = type(_f.func_code)
except RuntimeError:
# Execution in restricted environment
pass
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def g():
yield 1
GeneratorType = type(g())
del g
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class _C:
def _m(self): pass
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ClassType = type(_C)
UnboundMethodType = type(_C._m) # Same as MethodType
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_x = _C()
InstanceType = type(_x)
MethodType = type(_x._m)
BuiltinFunctionType = type(len)
BuiltinMethodType = type([].append) # Same as BuiltinFunctionType
ModuleType = type(sys)
FileType = file
XRangeType = type(xrange(0))
try:
raise TypeError
except TypeError:
try:
tb = sys.exc_info()[2]
TracebackType = type(tb)
FrameType = type(tb.tb_frame)
except AttributeError:
# In the restricted environment, exc_info returns (None, None,
# None) Then, tb.tb_frame gives an attribute error
pass
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tb = None; del tb
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SliceType = type(slice(0))
EllipsisType = type(Ellipsis)
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DictProxyType = type(TypeType.__dict__)
del sys, _f, _C, _x # Not for export