Created
June 2, 2015 17:54
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Monty Hall Problem simulator
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| import random | |
| def monty_hall(door_selection=None, _choice=None): | |
| doors = ["goat" for _ in range(3)] | |
| car_index = random.randint(0, 2) | |
| doors[car_index] = "CAR" | |
| door_number = door_selection | |
| if door_number is None: | |
| door_number = int(input("Vyberte dvere c. 1, 2 nebo 3\n")) - 1 | |
| l = [0, 1, 2] | |
| l.remove(door_number) | |
| if door_number == car_index: | |
| opened_index = random.choice(l) | |
| if door_selection is None: | |
| print("Otevreny dvere c", str(opened_index + 1)) | |
| else: | |
| l.remove(car_index) | |
| opened_index = l[0] | |
| if door_selection is None: | |
| print("Otevreny dvere c", str(opened_index + 1)) | |
| if door_selection is None: | |
| print("chcete zmenit volbu dveri?") | |
| choice = _choice | |
| if choice is None: | |
| choice = input("Ano (a), Ne (n), Nahoda (r)\n") | |
| if choice == "r": | |
| choice = random.choice(["a", "n"]) | |
| l = [0, 1, 2] | |
| l.remove(door_number) | |
| l.remove(opened_index) | |
| if choice == "n": | |
| if door_selection is None: | |
| print(doors[door_number]) | |
| if doors[door_number] == "CAR": | |
| return True | |
| else: | |
| return False | |
| elif choice == "a": | |
| if door_selection is None: | |
| print(doors[l[0]]) | |
| if doors[l[0]] == "CAR": | |
| return True | |
| else: | |
| return False | |
| count_yes = 0 | |
| count_no = 0 | |
| count_rand = 0 | |
| for i in range(10000): | |
| res = monty_hall(random.randint(0, 2), "a") | |
| if res: | |
| count_yes += 1 | |
| res = monty_hall(random.randint(0, 2), "n") | |
| if res: | |
| count_no += 1 | |
| res = monty_hall(random.randint(0, 2), "r") | |
| if res: | |
| count_rand += 1 | |
| print("Wins, when decision changed", (count_yes / 10000) * 100, "%") | |
| print("Wins, when decision stayed", (count_no / 10000) * 100, "%") | |
| print("Wins, when decision was random", (count_rand / 10000) * 100, "%") |
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