centos7.5 安装python3.7

一，官网下载最新版python安装包

二，解压并编译安装

，解决依赖关系
yum -y install epel-release libffi-devel zlib*
，解压编译
tar xf Python-3.7..tgz
cd Python-3.7.
./configure --prefix=/usr/local/ && make && make install
，替换原路径，修改yum配置文件
mv /usr/bin/python /usr/bin/python_old
ln -s /usr/local/bin/python3. /usr/bin/python
ln -s /usr/local/bin/python3. /usr/bin/python3
vim /usr/bin/yum
#!/usr/bin/python2   (首行修改为python2)
vim /usr/libexec/urlgrabber-ext-down

#!/usr/bin/python2   (首行修改为python2)
4，验证
python -V