我用 Pygame Zero 和 MU IDE 創(chuàng)建了一個小游戲。游戲結束后，應詢問用戶是否想再玩一次。如果他選擇是，游戲應該從頭開始。我知道我可以用一個 While 循環(huán)來做到這一點，但我不知道怎么做。我試圖插入一個while循環(huán)。在 while 循環(huán)中，游戲函數(shù)被調用，但它不起作用。我試過這個：play_again = raw_input("If you'd like to play again, please type 'yes'")while playagain == "yes"      draw()      place_banana()      on_mouse_down(pos)      update_time_left()....我知道這是不正確的，但我不知道如何正確地做from random import randint import timeimport pygameHEIGHT = 800WIDTH = 800score = 0 time_left = 10banana = Actor("banana")monkey = Actor("monkey")def draw():    screen.clear()    screen.fill("white")    banana.draw()    monkey.draw()    screen.draw.text("Number of bananas collected: " + str(score),      color = "black", topleft=(10,10))    screen.draw.text("Time: " + str(time_left), color = "black", topleft=(10,50))def place_banana():    banana.x = randint(125, 790)    banana.y = randint(186, 790)    monkey.x = 50    monkey.y = 740def on_mouse_down(pos):    global score    if banana.collidepoint(pos):         score = score + 1         place_banana() def update_time_left():    global time_left    if time_left:           time_left = time_left - 1    else:          screen.fill("pink")  # code is not executed        game_over() place_banana() clock.schedule_interval(update_time_left, 1.0)def game_over():    screen.fill("pink") # code is not executed    global time_left    message = ("Ende. Number of bananas collected")   # code is not   executed    time_left = 0    time.sleep(5.5)    quit()