Author rhettinger
Recipients rhettinger, wbolster
Date 2017-07-13.04:58:32
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Message-id <1499921913.4.0.933851064383.issue30907@psf.upfronthosting.co.za>
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This seems like it optimizes an irrelevant use case, comparing a container to itself.  

I don't think this is likely to benefit any existing code, so it would be better not to add more code clutter/complexity with another special case code path unless we're pretty sure that special case actually arises in practice.

FWIW, the note about identity-implies-equality is a statement about how containers implement element comparison rather than about how two containers are compared to one another (as implemented in PyObject_RichCompareBool()).  Also, it isn't just an optimization, it is necessary to help us reason about containers (i.e. preserving the invariant: all(x in c for x in c)).
History
Date User Action Args
2017-07-13 04:58:33rhettingersetrecipients: + rhettinger, wbolster
2017-07-13 04:58:33rhettingersetmessageid: <1499921913.4.0.933851064383.issue30907@psf.upfronthosting.co.za>
2017-07-13 04:58:33rhettingerlinkissue30907 messages
2017-07-13 04:58:32rhettingercreate