Pygame -事件发生后精灵的旋转不起作用

import pygame

# 初始化Pygame
pygame.init()

# 创建游戏窗口
window_width = 800
window_height = 600
window = pygame.display.set_mode((window_width, window_height))

# 加载精灵图像
sprite_image = pygame.image.load("sprite.png")

# 创建精灵对象
sprite = pygame.sprite.Sprite()
sprite.image = sprite_image
sprite.rect = sprite.image.get_rect()
sprite.rect.center = (window_width / 2, window_height / 2)

# 游戏主循环
running = True
while running:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            running = False

    # 旋转精灵
    rotated_sprite = pygame.transform.rotate(sprite.image, 45)
    sprite.image = rotated_sprite

    # 绘制精灵
    window.fill((255, 255, 255))
    window.blit(sprite.image, sprite.rect)

    # 更新显示
    pygame.display.flip()

# 退出游戏
pygame.quit()