How about this?
import numpy as np
def play_monty_hall(rounds=100):
car = np.random.randint(low=1,high=4,size=rounds)
first_door = np.random.randint(low=1,high=4,size=rounds)
switching_wins = car != first_door
staying_wins = np.logical_not(switching_wins)
print(sum(switching_wins))
print(sum(staying_wins))