Glenn Linderman <v+pyt...@g.nevcal.com> added the comment:

Nick says (and later explains better what he meant): 
The status quo works. Proposals to change it on theoretical grounds have a 
significantly higher bar to meet than proposals to simply document it clearly.

I say:
What the status quo doesn't provide is containers that "work".  In this case 
what I mean by "work" is that equality of containers is based on value, and 
value comparisons, and accept and embrace non-reflexive equality.  It might be 
possible to implement alternate containers with these characteristics, but that 
requires significantly more effort than simply filtering values.

Nonetheless, I totally agree with msg134654, and agree that properly 
documenting the present implementation would be a great service to users of the 
present implementation.

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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue11945>
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