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0）安装环境
yum install -y gcc patch libffi-devel python-devel zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gdbm-devel db4-devel libpcap-devel xz-devel
1）下载解压
下载
wget https://www.python.org/ftp/python/3.6.6/Python-3.6.6.tgz
解压缩
tar -zxvf Python-3.6.6.tgz
2）编译安装
进入python文件夹cd Python-3.6.6，执行命令进行编译
./configure --prefix=/usr/local/python36 #指定安装目录为/usr/local/python36
make #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 install
3）修改配置
设置全局环境变量
vi /etc/profile
在最下面添加
PATH=/usr/local/python36/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/root/bin
保存退出，重载生效
source /etc/profile
4）进入Python
输入python3进入之后可以查看版本，exit()退出