saving path to modules permanently

[Frank]

Hi,

I want to create some modules to use them in my programs. Now the
problem is, how to add the path to these modules permanently to the
python search path.

For example:

import sys
sys.path.append('path to my modules')


works fine for one session but does not save this path permanently. I
also tried alreday to set the PYTHONPAHT variable to my modules but
for some reason this does not work either.

Question:
Can one add a permenent path via pathon commands (I checked already
sys, but it does not seem to have a function for this).

If not, how to do it otherwise.

It would be great to give the precise commands if someone knows how.
(BTW, I use linux)

Thanks!

Frank