Current working directory as a resource in Python

usage.py

with WorkDir("/foo/bar/baz"):
  # Do something while inside /foo/bar/baz ...
  pass

workdir.py

import os
from pathlib import Path

class WorkDir:

    def __init__(self, path: Path):
        self.new_dir = path
        self.old_dir = None

    def __enter__(self):
        self.old_dir = os.getcwd()
        os.chdir(self.new_dir)
        return self

    def __exit__(self, exc_type, exc_val, exc_tb):
        os.chdir(cast(Path, self.old_dir))