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<https://aicodev.cn/2019/05/14/%E4%BD%BF%E7%94%A8-python-%E5%92%8C-pygame-%E6%A8%A1%E5%9D%97%E6%9E%84%E5%BB%BA%E4%B8%80%E4%B8%AA%E6%B8%B8%E6%88%8F%E6%A1%86%E6%9E%B6/>