Python os.path.relpath behavior

Question

I have a directory bar inside a directory foo, with file foo_file.txt in directory foo and file bar_file.txt in

Answer 1

os.path.relpath() assumes that its arguments are directories.

>>> os.path.join(os.path.relpath(os.path.dirname('foo/bar/bar_file.txt'),
        os.path.dirname('foo/foo_file.txt')),
        os.path.basename('foo/bar/bar_file.txt'))
'bar/bar_file.txt'