[issue45080] functools._HashedSeq implements __hash__ but not __eq__

[Serhiy Storchaka]

Serhiy Storchaka <storchaka+cpython at gmail.com> added the comment:

1. self.hashvalue == other.hashvalue is not enough. Different tuples can have the same hash value, so you steel need to compare their context.

2. _HashedSeq is only used as a key in a dictionary. When you look up a key in dictionary, it compares hashes first. __eq__ is only called when hashes match.

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nosy: +rhettinger, serhiy.storchaka

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<https://bugs.python.org/issue45080>
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