1.下载liunx安装包
2.安装依赖库：
yum install openssl-devel bzip2-devel expat-devel gdbm-devel readline-devel sqlite-devel
3.解压缩
tar -zxvf python-3.6.2.tgz
4.进入压缩包
cd python-3.6.2/
5.创建安装路径
mkdir /usr/local/python3
6.为python指明安装路径
./configure -prefix =/usr/local/python3
7.编译，安装
sudo make &&make install
8.为python3创建软链接
ln -s /usr/local/python3/bin/python3 /usr/bin/python3
9.为pip创建软链接
ln -s /usr/local/python3/bin/pip3 /usr/bin/pip3
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liunx自带python2，但是没有pip模块
默认已经安装好了python2，为python2来添加pip功能
安装扩展源：yum -y install epel-release
yum安装python2的pip：yum install python-pip