Message 334122 - Python tracker

Message334122

Author	jdemeyer
Recipients	AVINASH MISHRA, jdemeyer, ncoghlan, remi.lapeyre, ronaldoussoren, serhiy.storchaka, vstinner
Date	2019-01-21.10:48:34
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1548067714.77.0.445921593222.issue35707@roundup.psfhosted.org>
In-reply-to

Content
The motivation for PEP 357 was certainly using an object as the index for a sequence, but that's not the only use case. In fact PEP 357 states "For example, the slot can be used any time Python requires an integer internally" So despite the name __index__, I think that this is now the de facto standard for "convert the object (which is some kind of integer) to a Python int without loss of precision".

Content

The motivation for PEP 357 was certainly using an object as the index for a sequence, but that's not the only use case.

In fact PEP 357 states "For example, the slot can be used any time Python requires an integer internally"

So despite the name __index__, I think that this is now the de facto standard for "convert the object (which is some kind of integer) to a Python int without loss of precision".

History
Date	User	Action	Args
2019-01-21 10:48:35	jdemeyer	set	recipients: + jdemeyer, ronaldoussoren, ncoghlan, vstinner, serhiy.storchaka, remi.lapeyre, AVINASH MISHRA
2019-01-21 10:48:34	jdemeyer	set	messageid: <1548067714.77.0.445921593222.issue35707@roundup.psfhosted.org>
2019-01-21 10:48:34	jdemeyer	link	issue35707 messages
2019-01-21 10:48:34	jdemeyer	create