http://python.jobbole.com/77821/
http://python.jobbole.com/86405/
http://python.jobbole.com/81336/
https://www.zhihu.com/question/20899988
https://www.liaoxuefeng.com/wiki/0014316089557264a6b348958f449949df42a6d3a2e542c000/0014317849054170d563b13f0fa4ce6ba1cd86e18103f28000
https://www.2cto.com/kf/201507/417660.html
http://python.jobbole.com/87284/
https://www.cnblogs.com/xueweihan/p/4592212.html
https://cuiqingcai.com/category/technique/python
https://cuiqingcai.com/4380.html
http://python.jobbole.com/87284/