interacting with the file system using pathlib instead of os.path

[JessicaS11]

Currently, examples and code us os.path to interact with the file system. We'd like to transition to using pathlib instead. We're looking for someone interested in helping work with us on making this transition.

[fspaolo]

I think I can help replacing os.path, glob and directory/file operations with pathlib. I have started using pathlib on my code as well (and love this library).