[issue13258] replace hasattr(obj, '__call__') with callable(obj)

[Florent Xicluna]

Florent Xicluna <florent.xicl...@gmail.com> added the comment:

We have so many alternatives, it's funny ...


def callable(obj):
    return hasattr(obj, '__call__') or hasattr(obj, '__bases__')

def callable(obj):
    return isinstance(obj, collections.abc.Callable)

def callable(obj):
    return hasattr(obj, '__call__') or type(obj) == types.ClassType

def callable(obj):
    return any("__call__" in klass.__dict__
               for klass in type(obj).__mro__)

----------
stage:  -> patch review

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<http://bugs.python.org/issue13258>
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