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, 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
">

(original) (raw)

Hello.

In this post, 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, 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