get extension from filename python code example

Example 1: split filename and extension python

>>> import os
>>> filename, file_extension = os.path.splitext('/path/to/somefile.ext')
>>> filename
'/path/to/somefile'
>>> file_extension
'.ext'

Example 2: python get file extension from path

import os.path
extension = os.path.splitext(filename)[1]

Example 3: python get filename without extension

#Using pathlib in Python 3.4+
from pathlib import Path
Path('/root/dir/sub/file.ext').stem

Example 4: os extension

>>> os.path.splitext('/a/b.c/d')
('/a/b.c/d', '')