python cookbook3http://python3-cookbook.readthedocs.io/zh_CN/latest/index.html练手项目 https://www.zhihu.com/question/29372574版权声明：本文为xiaochonghao原创文章，遵循CC 4.0 BY-SA版权协议，转载请附上原文出处链接和本声明。原文链接：https://blog.csdn.net/xiaochonghao/article/details/70158860