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

[Antoine Pitrou]

Antoine Pitrou <pitrou at free.fr> added the comment:

For packaging I'm not sure it's worth complicating backporting.

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nosy: +eric.araujo, pitrou

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue13258>
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