Message 358464 - Python tracker

Message358464

Author	Marco Sulla
Recipients	Marco Sulla, brandtbucher, cheryl.sabella, mark.dickinson, rhettinger, serhiy.storchaka, tim.peters
Date	2019-12-16.05:17:22
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1576473443.12.0.635199233863.issue36095@roundup.psfhosted.org>
In-reply-to

Content
Excuse me, I had an epiphany. NaN returns False for every comparison. So in teory any element of the iterable should result minor that NaN. So NaN should treated as the highest element, and should be at the end of the sorted result! Indeed this is the behavior in Java. NaNs are in the end of the sorted iterator. On the contrary, Python sorting does not move the NaN from its position. Why?

Content

Excuse me, I had an epiphany.

NaN returns False for every comparison.

So in teory any element of the iterable should result minor that NaN.

So NaN should treated as the highest element, and should be at the end of the sorted result!

Indeed this is the behavior in Java. NaNs are in the end of the sorted iterator.

On the contrary, Python sorting does not move the NaN from its position.

Why?

History
Date	User	Action	Args
2019-12-16 05:17:23	Marco Sulla	set	recipients: + Marco Sulla, tim.peters, rhettinger, mark.dickinson, serhiy.storchaka, cheryl.sabella, brandtbucher
2019-12-16 05:17:23	Marco Sulla	set	messageid: <1576473443.12.0.635199233863.issue36095@roundup.psfhosted.org>
2019-12-16 05:17:23	Marco Sulla	link	issue36095 messages
2019-12-16 05:17:22	Marco Sulla	create