[Python-Dev] Sub-claasing pathlib.Path seems impossible

[Ryan Gonzalez]

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 <projetmbc at 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*
>
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-- 
Ryan
[ERROR]: Your autotools build scripts are 200 lines longer than your
program. Something’s wrong.
http://kirbyfan64.github.io/
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