安装python3

tar -xzvf Python-3.3.tgz
cd Python-3.3

export LANG=zh_CN.UTF-8
export LANGUAGE=zh_CN.UTF-8

mkdir /usr/local/python3
./configure --prefix=/usr/local/python3

make all
make install
make clean

rm /usr/bin/python
ln -s /usr/local/python3/bin/python3 /usr/bin/python

修复不能正常工作的Yum：
打开Yum的配置文件/usr/bin/yum，将第一行修改为：!#/usr/bin/python2.4
打开/usr/sbin/yum-updatesd，将第一行修改为：!#/usr/bin/python2.4
运行命令：/usr/bin/python2.4，然后import yum