# Suppose you're on a game show, and you're given the choice of three doors: Behind one door is a car; behind the others, goats. You pick a door, say No. 1 [but the door is not opened], and the host, who knows what's behind the doors, opens another door, say No. 3, which has a goat. He then says to you, "Do you want to pick door No. 2?" Is it to your advantage to switch your choice?

import sys, traceback, random

def Game(switch):

    # players options
    doors = []
    doors.append("Car")
    doors.append("Goat")
    doors.append("Goat")

    # player chooses a random door
    players_choice = doors[random.randint(0,2)]

    doors.pop(random.randint(1,2))

    # switch or stick with initial choice
    if (switch):

        if (players_choice == "Car"):
            return False
        else:
            return True

    else:
        return players_choice == "Car"

def Run():

    tries = int(raw_input("Number of tries: "))

    switch_success = 0
    stay_success = 0

    # play and switch
    for index in range(tries):
        if (Game(True)):
            switch_success += 1

    # play and keep original choice
    for index in range(tries):
        if (Game(False)):
            stay_success += 1

    switch_percent = (float(switch_success)/float(tries))*100
    stay_percent = (float(stay_success)/float(tries))*100

    print "Switching success: " + str(switch_percent)
    print "Staying success: " + str(stay_percent)

def main(args):
    try:
        Run();
    except:
        traceback.print_exc(file=sys.stdout)
        # error handling code here
        return 1  # exit on error
    else:
        return 0  # exit errorlessly

if __name__ == '__main__':
    sys.exit(main(sys.argv))