It's always so funny when a person starts using multiprocessing in Python, because if there's "multi", obviously THIS is the thing that should free the person from a headache of having GUI frozen. You know, because it does "multiple" ehm... stuff..... at once....... yeah. And it's popular, it must work for me too! Oh how often I see this. :D

Stupidly enough that's not entirely a user's fault, but Python's as naming things with "multi" doesn't end up well basically with anything. I bet if there was such thing as multipointer in C half of the beginners would be totally fucked and the other one would just break their machines beyond repair with a joy.

Yet... reading the damn documentation should be a requirement before using threading or multiprocessing to prevent the confusion, because there's this funny difference between multiple threads and multiple processes which will haunt you unless you see what's what and use it correctly.