1. sudo yum -y install epel-release
    3. sudo yum -y install https://centos7.iuscommunity.org/ius-release.rpm
    5. sudo yum -y install python36u
    7. sudo yum -y install python36u-pip
    10. # 亲测可省略
    11. ln -s /usr/bin/python3.6 /usr/bin/python3
    12. ln -s /usr/bin/pip3.6 /usr/bin/pip3