https://github.com/aosabook/500lines/blob/master/template-engine/code/test_templite.py
http://aosabook.org/en/index.html
https://juejin.im/post/5a52e87f5188257340261417
http://jianpx.iteye.com/blog/899230
https://wiki.python.org/moin/Templating 这个推荐
https://github.com/purcell/airspeed