raylu/pyc: python competition @ master

raylu 68ec6a5d93 use __import__ instead of exec		14 anni fa
..
genpizza.py	8c26371331 Lab 3 (pizza)	14 anni fa
handout.piz	8c26371331 Lab 3 (pizza)	14 anni fa
invalid.piz	8c26371331 Lab 3 (pizza)	14 anni fa
lab1.py	68ec6a5d93 use __import__ instead of exec	14 anni fa
lab2.py	68ec6a5d93 use __import__ instead of exec	14 anni fa
lab3.py	68ec6a5d93 use __import__ instead of exec	14 anni fa