Issue 24188: Signature objects not hashable (original) (raw)

This issue has been migrated to GitHub: https://github.com/python/cpython/issues/68376

classification

process

Created on 2015-05-14 09:35 by pitrou, last changed 2022-04-11 14:58 by admin. This issue is now closed.

Messages (6)
msg243164 - (view)	Author: Antoine Pitrou (pitrou) *	Date: 2015-05-14 09:35
inspect.Signature objects are immutable, but they are not hashable. It would be useful if they were. (I would have a similar request for bound arguments but unfortunately their mutability may make it less desirable)
msg243169 - (view)	Author: Serhiy Storchaka (serhiy.storchaka) *	Date: 2015-05-14 10:22
([],) is immutable, but is not hashable. If default values affect the hash, the signature can't be always hashable.
msg243171 - (view)	Author: Antoine Pitrou (pitrou) *	Date: 2015-05-14 10:23
But that kind of makes my point. While ([],) is not hashable, other tuples are hashable.
msg243172 - (view)	Author: Antoine Pitrou (pitrou) *	Date: 2015-05-14 10:24
Also, a workaround would be to id() the defaults when hashing.
msg243189 - (view)	Author: Yury Selivanov (Yury.Selivanov) *	Date: 2015-05-14 13:20
Signatures and Parameters are already hash able in 3.5. Please close the issue.
msg243190 - (view)	Author: Antoine Pitrou (pitrou) *	Date: 2015-05-14 13:20
Oh, great! Thank you.