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Code Issues Projects Releases Packages Wiki Activity Actions 11

inspect.signature: Support classes without user-defined __init__/__new__ #20308

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This commit is contained in:
Yury Selivanov 2014-01-27 19:29:45 -05:00
parent 7aedea40d6
commit e7dcc5e97a
3 changed files with 28 additions and 0 deletions
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11
Lib/inspect.py
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@ -1561,6 +1561,17 @@ def signature(obj):
init = _get_user_defined_method(obj, '__init__')
if init is not None:
sig = signature(init)
if sig is None:
if type in obj.__mro__:
# 'obj' is a metaclass without user-defined __init__
# or __new__. Return a signature of 'type' builtin.
return signature(type)
else:
# We have a class (not metaclass), but no user-defined
# __init__ or __new__ for it
return signature(object)
elif not isinstance(obj, _NonUserDefinedCallables):
# An object with __call__
# We also check that the 'obj' is not an instance of