def main(): pygame.init() pygame.display.set_caption(GAME_NAME) hero = HeroPlane( 240, 550, screen) # import module 与 from module import 的区别, 前者调用要先加模块名 enemy = Enemy(screen) while True: screen.blit(bg, (0., 0.)) hero.display() enemy.display() pygame.display.update() Control.key_control(hero)