https://www.python.org/downloads/release/python-370/ python3.7.0 win10环境，选：Windows x86-64可执行安装程序。 https://www.python.org/ftp/python/3.7.0/python-3.7.0-amd64.exe
https://www.liaoxuefeng.com/wiki/0014316089557264a6b348958f449949df42a6d3a2e542c000 Python教程 - 廖雪峰
https://blog.csdn.net/dongfuguo/ 董付国的Python专栏
https://www.cnblogs.com/shujuxiong/p/9148753.html python3简明教程 2019-7-27
https://www.cnblogs.com/butterfly100/p/8436627.html python学习笔记-基础（有点长，适合复习。看一下装饰器，和后半部分） 2018-5-21
http://www.cnblogs.com/butterfly100/p/9034281.html 数据库分库分表思路
https://www.liaoxuefeng.com/wiki/001374738125095c955c1e6d8bb493182103fac9270762a000/001386819879946007bbf6ad052463ab18034f0254bf355000 python装饰器
https://github.com/BisratYalew/python-cheatsheet 常用python代码片段 2019-4-21