1.先下载源码包：wget https://www.python.org/ftp/python/3.6.6/Python-3.6.6.tgz
将源码包下载到 usr/soft路径下
2.下载python3编译的依赖包：yum install -y gcc patch libffi-devel zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gdbm-devel xz-devel
3.解压：tar -zxvf Python-3.6.6.tgz
4.进入解压后的Python3.6.6文件下：cd Python-3.6.6 ./configure --prefix=/usr/local/python3
5.编译：相当于把源码包里面的代码编译成linux服务器可以识别的代码 make
6.编译安装：make install
7.查看pip版本：pip3 -V
8.更改linux的path变量，添加python3:
1)编辑环境变量：vim /etc/profile
2)修改路径：path=/usr/local/python3/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/root/bin 注意：将python放在最前面
3)重载配置文件：source /etc/profile
4)查看path：echo $path
9.进入python3：python3
原博客：https://www.cnblogs.com/knighterrant/p/10719887.html
