1、安装依赖
yum install zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gcc make
2、安装工具，防止pip安装失败
yum install libffi-devel -y
3、打开python的官方网站：https://www.python.org/ -->Downloads-->Source code-->Latest Python 3 Release - Python 3.7.0-->拉到最下面，选择Gzipped source tarball，复制连接，如下
wget https://www.python.org/ftp/python/3.7.0/Python-3.7.0.tgz
4、解压
tar -zxvf Python-*.tgz
5、重命名文件夹
mv Python* python
6、安装
cd python ./configure make&&make install
7、建立python3软链
ln -s /usr/Python /usr/bin/python3
8检验
python3 -V
9、安装pip
yum -y install epel-release yum install python-pip pip install --upgrade pip
