centos7 yum安装python3.6 和pip3

此方法安装的python3和python2共存，分别使用python3和python调用

1.安装EPEL和IUS软件源

yum install epel-release -y
yum install https://centos7.iuscommunity.org/ius-release.rpm -y

2.安装python3.6

yum install python36u -y

3.配置python软链接

ln -s /usr/bin/python3.6 /usr/bin/python3

4.安装pip3

yum install python36u-pip -y

5.配置pip3软链接

ln -s /usr/bin/pip3.6 /usr/bin/pip3