1、安装epel扩展源：“sudo yum install epel-release”

2、安装python-pip：“sudo yum install python-pip”

3、升级pip：“sudo pip install --upgrade pip”

4、安装requests包：“sudo pip install requests”

5、清除cache：“sudo yum clean all”

http://blog.csdn.net/trb331617/article/details/72851971