20171130-2-python orm

https://www.cnblogs.com/pycode/p/mysql-orm.html

https://www.cnblogs.com/Hiberniane/archive/2011/01/30/2488506.html

http://python.jobbole.com/84100/

https://www.cnblogs.com/zhangyux/p/6284669.html

https://www.cnblogs.com/guqing/p/6653843.html

http://blog.csdn.net/haskei/article/details/57075381

http://blog.csdn.net/fgf00/article/details/52949973

https://segmentfault.com/a/1190000002475001

https://www.liaoxuefeng.com/wiki/001374738125095c955c1e6d8bb493182103fac9270762a000/001402228705570c9506d546a3349c6b7d64135127672fe000