Centos install Python3

1. 下载Python3
   wget http://python.org/ftp/python/3.4.1/Python-3.4.1.tar.xz
   
   

2. 安装
   yum install openssl-devel bzip2-devel expat-devel gdbm-devel readline-devel sqlite-devel
   

   tar xvf Python-3.4.1.tar.xz
   cd Python-3.4.1

   ./configure --prefix=/opt/python3
   make
   make install

   cd /opt/python3/bin/
   cp python3 /usr/bin/
   cd /usr/bin/
   mv python python.bak
   mv python3 python