查看原Python版本

[root@host ~]# python -V
Python 2.6.6

安装升级相应的软件包

yum install zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gcc make

下载python 2.7 的源码包

wget http://mirrors.sohu.com/python/2.7.6/Python-2.7.6.tgz

解压

tar zxf Python-2.7.6.tgz -C /usr/local/src/

安装

cd /usr/local/src/Python-2.7.6/
./configure --prefix=/usr/local/python2.7
make && make install

配置python

mv /usr/bin/python /usr/bin/python.bak
ln -s /usr/local/python2.7/bin/python2.7 /usr/bin/python

查看版本

[root@host Python-2.7.6]# python -V
Python 2.7.6

解决无法使用yum的问题

vi /usr/bin/yum

修改第一行的#!/usr/bin/python为#!/usr/bin/python2.6