Message 390698 - Python tracker

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Author	rhettinger
Recipients	congma, mark.dickinson, rhettinger, serhiy.storchaka, tim.peters
Date	2021-04-10.07:14:42
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1618038882.89.0.154882927505.issue43475@roundup.psfhosted.org>
In-reply-to

Content
Mark, is there any reason hash(float('NaN')) and hash(Decimal('NaN')) have to be a constant? Since NaNs don't compare equal, the hash homomorphism has no restrictions. Why not have hash() return the id() like we do for instances of object? I understand that sys.hash_info.nan would be invalidated, but that was likely useless anyway.

Mark, is there any reason hash(float('NaN')) and hash(Decimal('NaN')) have to be a constant?  Since NaNs don't compare equal, the hash homomorphism has no restrictions.  Why not have hash() return the id() like we do for instances of object?

I understand that sys.hash_info.nan would be invalidated, but that was likely useless anyway.

History
Date	User	Action	Args
2021-04-10 07:14:42	rhettinger	set	recipients: + rhettinger, tim.peters, mark.dickinson, serhiy.storchaka, congma
2021-04-10 07:14:42	rhettinger	set	messageid: <1618038882.89.0.154882927505.issue43475@roundup.psfhosted.org>
2021-04-10 07:14:42	rhettinger	link	issue43475 messages
2021-04-10 07:14:42	rhettinger	create