[issue17576] PyNumber_Index() is not int-subclass friendly (or operator.index() docos lie)

[Terry J. Reedy]

Changes by Terry J. Reedy <tjreedy at udel.edu>:


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versions:  -Python 3.1, Python 3.2

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue17576>
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