[issue16049] Create abstract base classes by inheritance rather than a direct invocation of __metaclass__

[Bruno Dupuis]

Bruno Dupuis added the comment:

This solution hides the risk of metaclass conflicts, as the user did not explicitly set the metaclass. IMO, this risk should be clearly told in the Doc.

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nosy: +bruno.dupuis

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue16049>
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