Currently the WFDB API uses 2 arguments to specify the location of files: pn_dir and file_name. This is confusing for users and confusing for developers (e.g. see: https://github.com/MIT-LCP/wfdb-python/pull/523/files).

I think the reason for having two arguments is to support auto-detection of files (e.g. get locally if local and if not get from the PhysioNet servers). This kind of behaviour doesn't seem like a good idea. If WFDB is retrieving a remote file, it should be explicit.

My preference would be to:

• Introduce a new path argument
• Deprecate pn_dir and file_name
• Remove any logic that automatically retrieves files from remote servers.