diff options
Diffstat (limited to 'Lib/inspect.py')
| -rw-r--r-- | Lib/inspect.py | 16 |
1 files changed, 11 insertions, 5 deletions
diff --git a/Lib/inspect.py b/Lib/inspect.py index bc7eace943..4842965231 100644 --- a/Lib/inspect.py +++ b/Lib/inspect.py @@ -2097,10 +2097,14 @@ class Signature: def from_function(cls, func): '''Constructs Signature for the given python function''' - if not (isfunction(func) or _signature_is_functionlike(func)): - # If it's not a pure Python function, and not a duck type - # of pure function: - raise TypeError('{!r} is not a Python function'.format(func)) + is_duck_function = False + if not isfunction(func): + if _signature_is_functionlike(func): + is_duck_function = True + else: + # If it's not a pure Python function, and not a duck type + # of pure function: + raise TypeError('{!r} is not a Python function'.format(func)) Parameter = cls._parameter_cls @@ -2164,9 +2168,11 @@ class Signature: parameters.append(Parameter(name, annotation=annotation, kind=_VAR_KEYWORD)) + # Is 'func' is a pure Python function - don't validate the + # parameters list (for correct order and defaults), it should be OK. return cls(parameters, return_annotation=annotations.get('return', _empty), - __validate_parameters__=False) + __validate_parameters__=is_duck_function) @classmethod def from_builtin(cls, func): |