[issue27598] Add SizedIterable to collections.abc and typing

[Neil Girdhar]

Neil Girdhar added the comment:

Given issue http://bugs.python.org/issue27802, it might be worth considering that all Collections implement __eq__ and __ne__, so maybe these should be abstract methods on Collection?

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue27598>
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