[issue9533] metaclass can't derive from ABC

[Terry J. Reedy]

Terry J. Reedy <tjreedy at udel.edu> added the comment:

+- same traceback in 3.1
Since ABCmeta is not used (by name) its import is not needed.
I have no opinion on whether this should work.

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nosy: +terry.reedy
versions: +Python 2.7, Python 3.1, Python 3.2 -Python 2.6

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<http://bugs.python.org/issue9533>
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