[issue7624] isinstance(... , collections.Callable) fails with oldstyle class i nstances

[Florent Xicluna]

Florent Xicluna <laxyf at yahoo.fr> added the comment:

Wow, critical issue, are you sure?

Here is the patch, with tests.
IMO, the tests may be ported to 3.x.

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keywords: +patch
stage: needs patch -> patch review
Added file: http://bugs.python.org/file16038/issue7624_abc.diff

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