Trace Files/modules Loaded When Launching Python

I am using Paraview 4.0.1 under Ubuntu 14.04 LTS. But I guess the answer to this question does not necessarily requires knowledge specific to Paraview python. When I load a python

Solution 1:

I have found one option which gives some information, I do not know if it is the only/best one.

Setting

$ export PYTHONVERBOSE=2

(or a different integer for verbosity level [1]) gives a lot of info. Still, I couldn't find the source of error...