PEP 370 -- Per user site-packages directory https://www.python.org/dev/peps/pep-0370/
Site-specific configuration hook¶ https://docs.python.org/3/library/site.html
https://stackoverflow.com/questions/7901373/configuring-python-to-use-additional-locations-for-site-packages https://stackoverflow.com/questions/45528195/import-logic-python-project https://stackoverflow.com/questions/16981921/relative-imports-in-python-3