looking fo documentation for module files

[snippsat]

This is also the greatest flaw of PYTHONPATH. Using the same installed modules for several versions of Python leads to troubles and inconsistencies.

Yes i do agree,i am very aware of what problem's it can cause,so for me personally it's not a problem.
So i would not advice using PYTHONPATH, use site module,and that has been my answer when this topic has been up before.