1、安装依赖文件

yum install openssl-devel bzip2-devel expat-devel gdbm-devel readline-devel sqlite-devel

yum install -y gcc-c++

2、下载python源码包

Python-3.5.5.tgz

3、解压：tar -zxvf Python-3.5.5.tgz

4、python3.5目录配置

./configure

编译安装 make install

5、设置默认版本3.5

mv /usr/bin/python /usr/bin/python2

mv /data/Python355/python /usr/bin/python

6、修改yum为python2

vim /usr/bin/yum

#!/usr/bin/python2