PSSE Version 33.4 contains a bug so that you can't import module wx or cmath without getting ImportError respectively making PSSE and Python crash. The bug is fixed in version 33.5 and 33.6 of PSSE so update your version of PSSE if you run into the problem. There is no quick-fix for the problem. Update your PSSE version instead!
You can't open PSSE GUI graphically after calling psseinint() from python.
You can't establish contact between an already running GUI PSSe instance and python code EXCEPT via "Run automation File".