Let's update the codebase and tests:

1. replace all os.path.exists(folder) usage by Path(folder).exists()
2. replace all os.path.join(a, b) by Path(a) / b
3. replace os.makedirs(folder) by Path.mkdir(folder, parents=True)
4. update all folder/files being str to Union[str, Path] and make all folder/file-like attributes as Path objects.

• ignite/ignite/handlers/checkpoint.py

  Line 649 in 0666b40

  class DiskSaver(BaseSaveHandler):