Question about Python objects in C++

Hi, i have a few questions:

I am trying to share Python objects between different Python scripts. I save these Python objects in C++ variables, an then pass these objects to other scripts later.

I do not understand, how garbage collection handles these objects. Does the Python interpreter destroy these objects each time, a script terminates? Can i prevent this? Do i have to make an INCREF or DECREF each time, this object is passed to another script?

Please, can someone give me some clue?