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python设计模式: http://www.pythontip.com/python-patterns/detail/abstract_factory
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python sqlite3的使用: https://blog.csdn.net/GuoQiZhang/article/details/91344509
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在Python中如何基于接口编程 https://zhuanlan.zhihu.com/p/106992017
python设计模式: http://www.pythontip.com/python-patterns/detail/abstract_factory
python sqlite3的使用: https://blog.csdn.net/GuoQiZhang/article/details/91344509
在Python中如何基于接口编程 https://zhuanlan.zhihu.com/p/106992017