[issue40853] "set() in set()" should raise TypeError: unhashable type: 'set'

[yesheng]

yesheng <sheng.1.ye at 139.com> added the comment:

thanks, it sounds reasonable.
is it possible to make dict give consistent result?
{1,2} in {frozenset({1,2}):3} 
# to return True

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue40853>
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