参考连接
http://www.laozuo.org/2573.html
http://ruiaylin.github.io/2014/12/12/python%20update/
http://yijiebuyi.com/blog/108ae6186bb00cc708bc54f02adec277.html
Centos下升级Python
原文：http://my.oschina.net/jiangbianwanghai/blog/488672
