[issue24188] Signature objects not hashable

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

([],) is immutable, but is not hashable. If default values affect the hash, the signature can't be always hashable.

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nosy: +serhiy.storchaka

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue24188>
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