文件调用
https://blog.csdn.net/winycg/article/details/78512300
枚举
https://www.cnblogs.com/huwt/p/11183768.html
re模块
https://www.cnblogs.com/syw20170419/p/9749809.html
mysql 工具
https://blog.csdn.net/jor_ivy/article/details/81323199
Mac下maven的安装与配置
https://www.jianshu.com/p/a8704f402ad2
py 爬虫
http://c.biancheng.net/view/2011.html
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