https://docs.python.org/2/tutorial/
http://pandas.pydata.org/
http://matplotlib.org/
http://networkx.github.io/
http://scikit-learn.org/stable/
http://www.chioka.in/kaggle-competition-solutions/
哈佛大学主页http://www.seas.harvard.edu/
原文：http://www.cnblogs.com/sxbjdl/p/5596967.html