It does sound like subclassing Path should be made easier. On Sat, May 2, 2015 at 1:30 PM, Ryan Gonzalez <rym...@gmail.com> wrote:
> http://stackoverflow.com/a/29880095/2097780 > > My favorite thing about Python is that it's so easy to be evil. ;) > > > On Fri, May 1, 2015 at 2:30 PM, Christophe Bal <projet...@gmail.com> > wrote: > >> Hello. >> >> In this post >> <http://stackoverflow.com/questions/29850801/simple-subclassing-pathlib-path-does-not-work/29854141#29854141>, >> I have noticed a problem with the following code. >> >> from pathlib import Path >>> class PPath(Path): >>> def __init__(self, *args, **kwargs): >>> super().__init__(*args, **kwargs) >>> >>> test = PPath("dir", "test.txt") >>> >>> >> This gives the following error message. >> >> >> >>> Traceback (most recent call last): >>> File "/Users/projetmbc/test.py", line 14, in <module> >>> test = PPath("dir", "test.txt") >>> File "/anaconda/lib/python3.4/pathlib.py", line 907, in __new__ >>> self = cls._from_parts(args, init=False) >>> File "/anaconda/lib/python3.4/pathlib.py", line 589, in _from_parts >>> drv, root, parts = self._parse_args(args) >>> File "/anaconda/lib/python3.4/pathlib.py", line 582, in _parse_args >>> return cls._flavour.parse_parts(parts)AttributeError: type object >>> 'PPath' has no attribute '_flavour' >>> >>> >> This breaks the sub-classing from Python point of view. In the post >> <http://stackoverflow.com/questions/29850801/simple-subclassing-pathlib-path-does-not-work/29854141#29854141>, >> I give a hack to sub-class Path but it's a bit Unpythonic. >> >> *Christophe BAL* >> *Enseignant de mathématiques en Lycée **et développeur Python amateur* >> *---* >> *French math teacher in a "Lycée" **and **Python **amateur developer* >> >> _______________________________________________ >> Python-Dev mailing list >> Python-Dev@python.org >> https://mail.python.org/mailman/listinfo/python-dev >> Unsubscribe: >> https://mail.python.org/mailman/options/python-dev/rymg19%40gmail.com >> >> > > > -- > Ryan > [ERROR]: Your autotools build scripts are 200 lines longer than your > program. Something’s wrong. > http://kirbyfan64.github.io/ > > > _______________________________________________ > Python-Dev mailing list > Python-Dev@python.org > https://mail.python.org/mailman/listinfo/python-dev > Unsubscribe: > https://mail.python.org/mailman/options/python-dev/guido%40python.org > > -- --Guido van Rossum (python.org/~guido)
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