url backup

python:
https://www.douban.com/group/topic/21206826/
http://developer.51cto.com/art/201007/213585.htm
http://www.tuicool.com/articles/QBZzquY

uqer:
uqer精华帖
uqer新手贴

A Practical Guide To Quantitative Finance Interviews - Xinfeng Zhou(绿皮书)
Quant Job Interview Questions and Answers