Gambler's win

gamble.py

import random

cups = 3

i = 0
keeping_wins = 0
changing_wins = 0
while i < 1000:
    i += 1

    winning_cup = random.randint(1,cups)

    #first_pick = random.randint(1,cups)
    first_pick = 2

    while True:
        host_pick = random.randint(1,cups)
        if host_pick != first_pick and host_pick != winning_cup:
            break

    if first_pick == winning_cup:
        keeping_wins += 1
    else:
        changing_wins += 1

print "Keeping won {keep} times, changing won {change} times".format(
    keep=keeping_wins,
    change=changing_wins,
)