Subclass `pathlib.Path` fails

Question

I would like to enhance the class pathlib.Path but the simple example above dose not work.

from pathlib import Path

class PPath(Path):
    def          


        

Answer 1

You may be able to simplify your life depending on why you want to extend Path (or PosixPath, or WindowsPath). In my case, I wanted to implement a File class that had all the methods of Path, and a few others. However, I didn't actually care if isinstance(File(), Path).

Delegation works beautifully:

class File:

    def __init__(self, path):
        self.path = pathlib.Path(path)
        ...

    def __getattr__(self, attr):
        return getattr(self.path, attr)

    def foobar(self):
        ...

Now, if file = File('/a/b/c'), I can use the entire Path interface on file, and also do file.foobar().