dylemat Halla.py

#!/usr/bin/python

import random

gates = [1,2,3]

n = 1000000
n_switch = n_keep = 0

for i in xrange(n):
    prize = random.choice(gates)             # w tej bramce jest nagroda
    choice = random.choice(gates)            # bramka wybrana przez gracza
    empty = random.choice(list( set(gates) - set([prize,choice]) ))
    if prize == choice:
        n_keep += 1
    else:
        n_switch += 1

print 'zmiana: %f, bez zmiany: %f' % ( float(n_switch)/n, float(n_keep)/n )