Message 379251 - Python tracker

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In-reply-to
Author	serhiy.storchaka
Recipients	corona10, pitrou, serhiy.storchaka, shihai1991, vstinner
Date	2020年10月21日.20:52:33
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1603313553.4.0.509288379809.issue41052@roundup.psfhosted.org>

Content
I came to the same conclusion after trying to fix it. But we cannot just do it now. We have to fix bugs in Python 3.9 and support protocols 0 and 1 for some deprecation period. Also protocols 0 and 1 are used in some third-party implementations for other programming languages, so they can be used for interoperability with other languages. The proposed patch adds additional check. It uses the fact that the __new__ attribute for classes implemented in C is a bultin function with __self__ pointing to this class (it is created in tp_new_wrapper()).

Content

I came to the same conclusion after trying to fix it. But we cannot just do it now. We have to fix bugs in Python 3.9 and support protocols 0 and 1 for some deprecation period.
Also protocols 0 and 1 are used in some third-party implementations for other programming languages, so they can be used for interoperability with other languages.
The proposed patch adds additional check. It uses the fact that the __new__ attribute for classes implemented in C is a bultin function with __self__ pointing to this class (it is created in tp_new_wrapper()).

History
Date	User	Action	Args
2020年10月21日 20:52:33	serhiy.storchaka	set	recipients: + serhiy.storchaka, pitrou, vstinner, corona10, shihai1991
2020年10月21日 20:52:33	serhiy.storchaka	set	messageid: <1603313553.4.0.509288379809.issue41052@roundup.psfhosted.org>
2020年10月21日 20:52:33	serhiy.storchaka	link	issue41052 messages
2020年10月21日 20:52:33	serhiy.storchaka	create

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