title: pip install pathlib
body: <p>I work with python 2.7.8 and can't change the version of python because it affect other important programs. Continuously to <a href="https://stackoverflow.com/questions/28339000/unzip-zip-files-in-folders-and-subfolders-with-python#comment45037150_28345130">Unzip zip files in folders and subfolders with python</a> i don't know how to install "pip install pathlib". Any help would be great. </p>