Message344250
Hi guys!
I'm new to python and working on my first real project with it....
I'm sorry if it's not the right place for posting this.
I noticed that that pathlib.with_name() method does not accept to give a name to a path that does not already have one.
It seems a bit inconsistent knowing that the Path constructor does not require one...
>>> Path()
PosixPath('.')
>>> Path().resolve()
PosixPath('/home/nono')
but:
>>> Path().with_name('dodo')
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/lib/python3.7/pathlib.py", line 819, in with_name
raise ValueError("%r has an empty name" % (self,))
ValueError: PosixPath('.') has an empty name
whereas if you do:
>>> Path().resolve().with_name('dodo')
PosixPath('/home/dodo')
I first tought "explicit is better than implicit" and then why not allways use resolve first! That was not a big deal but then I tried:
>>> Path('..').with_name('dudu').resolve()
PosixPath('/home/nono/dudu')
( ! )
>>> Path('..').resolve().with_name('dudu')
PosixPath('/dudu')
It seems that the dots and slashes are in fact not really interpreted leading to:
>>> Path('../..').with_name('dudu')
PosixPath('../dudu')
>>> Path('../..').with_name('dudu').resolve()
PosixPath('/home/dudu')
( ! )
>>> Path('../..').resolve().with_name('dudu')
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/lib/python3.7/pathlib.py", line 819, in with_name
raise ValueError("%r has an empty name" % (self,))
ValueError: PosixPath('/') has an empty name
Even if the doc briefly tells about this, I found this behavior quite disturbing....
I don't know what could be the correct answer to this,
maybe making Path('..') as invalid as Path('.'),
or adding a few more lines in the doc...
Sincerly yours, |
|
Date |
User |
Action |
Args |
2019-06-02 01:18:12 | Nophke | set | recipients:
+ Nophke |
2019-06-02 01:18:12 | Nophke | set | messageid: <1559438292.33.0.601764456145.issue37130@roundup.psfhosted.org> |
2019-06-02 01:18:12 | Nophke | link | issue37130 messages |
2019-06-02 01:18:11 | Nophke | create | |
|