Message 214642 - Python tracker

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Author	akira
Recipients	akira
Date	2014-03-23.22:16:50
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1395613011.22.0.29152070109.issue21041@psf.upfronthosting.co.za>
In-reply-to

Content
`pathlib.PurePath.parents` is a sequence [1] but it rejects negative indexes: >>> from pathlib import PurePath >>> PurePath('a/b/c').parents[-2] Traceback (most recent call last): ... IndexError: -2 Sequences in Python interpret negative indexes as `len(seq) + i` [2] I've included the patch that fixes the issue and adds corresponding tests. No documentation changes are needed. [1]: http://docs.python.org/3/library/pathlib#pathlib.PurePath.parents [2]: http://docs.python.org/3/library/stdtypes.html#sequence-types-list-tuple-range

`pathlib.PurePath.parents` is a sequence [1] but it rejects negative indexes:

  >>> from pathlib import PurePath
  >>> PurePath('a/b/c').parents[-2]
  Traceback (most recent call last):
  ...
  IndexError: -2

Sequences in Python interpret negative indexes as `len(seq) + i` [2]

I've included the patch that fixes the issue and adds corresponding tests. No documentation changes are needed.

[1]: http://docs.python.org/3/library/pathlib#pathlib.PurePath.parents
[2]: http://docs.python.org/3/library/stdtypes.html#sequence-types-list-tuple-range

History
Date	User	Action	Args
2014-03-23 22:16:51	akira	set	recipients: + akira
2014-03-23 22:16:51	akira	set	messageid: <1395613011.22.0.29152070109.issue21041@psf.upfronthosting.co.za>
2014-03-23 22:16:51	akira	link	issue21041 messages
2014-03-23 22:16:50	akira	create