[issue16837] Number ABC can be instantiated

[Raymond Hettinger]

Raymond Hettinger <raymond.hettinger at gmail.com> added the comment:

Usually, setting hash to None is the proper way to turn-off hashability.  And it's possible that existing code has subclassed Number and provided other methods but not __hash__, so this could potentially break their code.  On the other hand, it would be desirable to prevent instantiation, perhaps using some other mechanism would be better.  I'll take a deeper look at this when I get a chance.

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assignee:  -> rhettinger

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue16837>
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