Message 261296 - Python tracker

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In-reply-to
Author	petr.viktorin
Recipients	docs@python, petr.viktorin
Date	2016年03月07日.11:15:48
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1457349348.27.0.253072992901.issue26502@psf.upfronthosting.co.za>

Content
According to the docs [0], traceback.extract_tb should return 4-tuples (filename, line number, function name, text). [0] https://docs.python.org/3/library/traceback.html#traceback.extract_tb Instead, since Python 3.5, it returns FrameSummary objects, which are not tuples, nor tuple subclasses, nor even sequences. (This broke some code in the wild that called len() on FrameSummary.) Issue 25111 pointed out another tuple incompatibility, which was fixed. Should __len__ be added as well? Or the whole Sequence ABC? I can provide a patch when those questions are answered.

Content

According to the docs [0], traceback.extract_tb should return 4-tuples (filename, line number, function name, text).
[0] https://docs.python.org/3/library/traceback.html#traceback.extract_tb
Instead, since Python 3.5, it returns FrameSummary objects, which are not tuples, nor tuple subclasses, nor even sequences. (This broke some code in the wild that called len() on FrameSummary.)
Issue 25111 pointed out another tuple incompatibility, which was fixed. Should __len__ be added as well? Or the whole Sequence ABC?
I can provide a patch when those questions are answered.

History
Date	User	Action	Args
2016年03月07日 11:15:48	petr.viktorin	set	recipients: + petr.viktorin, docs@python
2016年03月07日 11:15:48	petr.viktorin	set	messageid: <1457349348.27.0.253072992901.issue26502@psf.upfronthosting.co.za>
2016年03月07日 11:15:48	petr.viktorin	link	issue26502 messages
2016年03月07日 11:15:48	petr.viktorin	create

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