[issue28866] Unexpected behavior resulting from mro() and __setattr__ in interactive mode

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

Python 2 is affected if make Foo a new style class.

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nosy: +serhiy.storchaka
priority: normal -> high
versions: +Python 3.6, Python 3.7 -Python 3.4

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<http://bugs.python.org/issue28866>
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