diff options
Diffstat (limited to 'Lib/inspect.py')
| -rw-r--r-- | Lib/inspect.py | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/Lib/inspect.py b/Lib/inspect.py index 57cb3dc..25ddd26 100644 --- a/Lib/inspect.py +++ b/Lib/inspect.py @@ -2255,9 +2255,13 @@ def _signature_from_callable(obj, *, if type not in obj.__mro__: # We have a class (not metaclass), but no user-defined # __init__ or __new__ for it - if obj.__init__ is object.__init__: + if (obj.__init__ is object.__init__ and + obj.__new__ is object.__new__): # Return a signature of 'object' builtin. return signature(object) + else: + raise ValueError( + 'no signature found for builtin type {!r}'.format(obj)) elif not isinstance(obj, _NonUserDefinedCallables): # An object with __call__ |