[issue21041] pathlib.PurePath.parents rejects negative indexes
Yaroslav Pankovych added the comment: Here's possible fix: https://github.com/python/cpython/pull/21799 -- ___ Python tracker <https://bugs.python.org/issue21041> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue21041] pathlib.PurePath.parents rejects negative indexes
Yaroslav Pankovych added the comment:
That's kinda weird for python. I mean, in regular list/etc if I need the last
element, I'd normally do list[-1], but here to get the last parent, I need to
actually know how many parents do I have.
So now, I can do something like this:
>>> parents_count = len(path.parents) - 1
>>> path.parents[parents_count]
PosixPath('.')
--
message_count: 16.0 -> 17.0
nosy: +ypank
nosy_count: 10.0 -> 11.0
pull_requests: +20938
stage: -> patch review
versions: +Python 3.10, Python 3.5, Python 3.6, Python 3.7, Python 3.9
pull_request: https://github.com/python/cpython/pull/21799
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[issue21041] pathlib.PurePath.parents rejects negative indexes
Yaroslav Pankovych added the comment: Any thoughts about that folks? It's a pretty old bug, let's decide smth for it. -- ___ Python tracker <https://bugs.python.org/issue21041> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue21041] pathlib.PurePath.parents rejects negative indexes
Yaroslav Pankovych added the comment: That makes sense, but should we have this behaviour only for negative indices? We'll end up with something lie: path.parents[len(path.parents) - 1] != path.parents[-1] I think that is should be consistent regardless of negative/positive indices. -- ___ Python tracker <https://bugs.python.org/issue21041> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue21041] pathlib.PurePath.parents rejects negative indexes
Yaroslav Pankovych added the comment: And it looks like a special case, so "Special cases aren't special enough to break the rules." -- ___ Python tracker <https://bugs.python.org/issue21041> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue21041] pathlib.PurePath.parents rejects negative indexes
Yaroslav Pankovych added the comment: Agree with that, it currently supports this behavior. -- ___ Python tracker <https://bugs.python.org/issue21041> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
