Get Filename with Directory Names or Extensions in Python

import os
fpath = "./your-directory/sub-dir/fname.jpg"
print(os.sep)
# /

basename_ext = os.path.basename(fpath)
# fname.jpg

basename = os.path.splitext(os.path.basename(fpath))[0]
# fname

extension = os.path.splitext(os.path.basename(fpath))[-1]
# .jpg

dirname = os.path.dirname(fpath) 
# ./your-directory/sub-dir