我不確定為什么分數沒有更新。當任一玩家得分時，調試器打印 0。這是我的分數變量。player_score = 0opponent_score = 0basic_font = pygame.font.Font('freesansbold.ttf', 32)And the variables for rendering the score:player_text = basic_font.render(f'{player_score}', False, light_grey)screen.blit(player_text, (660, 470))opponent_text = basic_font.render(f'{opponent_score}', False, light_grey)screen.blit(opponent_text, (600, 470))還有我的更新方法。    def update(self, left_paddle, right_paddle, player_score, opponent_score):    self.rect.x += self.vx    self.rect.y += self.vy    if self.rect.top <= 0 or self.rect.bottom >= screen_height:        self.vy *= -1    if self.rect.left <= 0:        self.ball_start()        player_score += 1    if self.rect.right >= screen_width:        self.ball_start()        opponent_score += 1    if self.rect.colliderect(left_paddle) or self.rect.colliderect(right_paddle):        self.vx *= -1def ball_start(self):    self.rect.center = (screen_width / 2, screen_height / 2)    self.vy *= random.choice((1, -1))    self.vx *= random.choice((1, -1))然后我調用更新方法：ball.update(left_paddle, right_paddle, player_score, opponent_score)這是項目的代碼。非常感謝您的幫助。