Ubuntu系统安装pip
apt-get install python-pip
示例： pip install reuquests
Centos 系统安装
https://pypi.python.org/pypi/pip#downloads
wget https://pypi.python.org/packages/source/p/pip/pip-7.1.2.tar.gz#md5=3823d2343d9f3aaab21cf9c917710196
解压
Python setup.py install
原文：http://it1693.blog.51cto.com/2342744/1697476