The Monty Hall Problem

mhp.py

import random
right = 0.0
wrong = 0.0
x = 100000

for i in range(x):
    items = ['goat','prize', 'goat']
    random.shuffle(items)
    choice = random.randrange(0,3)
    choice_name = items[choice]
    for j in range(3):
        if j != choice and items[j] == 'goat':
            del items[j]
            break

    choice = items.index(choice_name)

    if choice == 1:
        choice = 0
    else:
        choice = 1

    if items[choice] == 'prize':
         right += 1
    else:
        wrong += 1

print 'You changed your choice and got the prize %.2f%% of the time.' % (right / x * 100)
print 'You changed your choice and lost the prize %.2f%% of the time.' % (wrong / x * 100)