Runs 1 million "Let’s Make a Deal" games (demonstrating the Monty Hall Paradox)

goats.py

import random

# number of games to play
num_games = 1000000

# keeps track of wins that occur when using 
# the selection-change-after-reveal strategy
reselect_win_tally = 0

for i in range(num_games):

    # there are three doors, and a random 
    # one has the car behind it
    doors = [False, False, False]
    cars_door = random.randrange(len(doors))
    doors[cars_door] = True

    # player selects a random door
    selected_door = random.randrange(len(doors))

    # if the selected door is not a car, then the 
    # strategy of changing the selection after the
    # reveal will result in a win
    if not doors[selected_door]:
        reselect_win_tally+=1

print(str(reselect_win_tally) + " wins, " + 
    str(num_games - reselect_win_tally) + " losses")