looking fo documentation for module files

[Gribouillis]

First do this

>>> import site
>>> site.getsitepackages()
['/usr/local/lib/python3.8/dist-packages', '/usr/lib/python3/dist-packages', '/usr/lib/python3.8/dist-packages']

You can store your python modules in one of the directories on the returned list to make them available to all users.

You could also create a specific directory, for example

Output:
mkdir /usr/local/lib/python3.8/our-site-packages

Then

>>> import sitecustomize
>>> sitecustomize
<module 'sitecustomize' from '/usr/lib/python3.8/sitecustomize.py'>

Edit sitecustomize.py and add this

import site
site.addsitedir('/usr/local/lib/python3.8/our-site-packages')

Then use this directory for your modules.