cd /opt/env

下载

wget http://cdn.npm.taobao.org/dist/python/3.6.5/Python-3.6.5.tgz

解压
tar -zxvf Python-3.6.5.tgz

安装编译环境

yum install -y gcc

yum install -y zlib*

yum -y install zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gdbm-devel db4-devel libpcap-devel xz-devel

进入Python3 源文件文件夹

cd Python-3.6.5/

指定安装目录

./configure --prefix=/usr/local/python3 --with-ssl

编译源文件、正式安装

make && make install

建立软连接

 ln -s /usr/local/python3/bin/python3 /usr/bin/python3 
 ln -s /usr/local/python3/bin/pip3 /usr/bin/pip3

python 3安装成功！