Message375076
As I can see, pathlib path parents don't support slicing with negative indexes:
>>> import pathlib
>>> path = pathlib.PosixPath("some/very/long/path/here")
>>> path.parents[-1]
...
raise IndexError(idx)
IndexError: -1
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('.')
So that's how I can get the last parent. But is it pythonic? No.
So, I decided to fix this, and now we can do negative slicing:
>>> path.parents[-1] == path.parents[parents_count]
True
>>> path.parents[-2] == path.parents[parents_count - 1]
True
So what do you guys think about this? |
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Date |
User |
Action |
Args |
2020-08-09 17:43:16 | ypank | set | recipients:
+ ypank |
2020-08-09 17:43:16 | ypank | set | messageid: <1596994996.9.0.794186780316.issue41511@roundup.psfhosted.org> |
2020-08-09 17:43:16 | ypank | link | issue41511 messages |
2020-08-09 17:43:16 | ypank | create | |
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