[issue26915] Test identity first in membership operation of ItemsView, ValuesView and Sequence in collections.abc

[Serhiy Storchaka]

Changes by Serhiy Storchaka <storchaka+cpython at gmail.com>:


----------
stage: needs patch -> patch review

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue26915>
_______________________________________