安装python3

yum install epel-release
yum install python36 python36-devel

修改默认python

mv /usr/bin/python/usr/bin/python.bak
 ln -s/usr/bin/python3.6/usr/bin/python

由于yum是基于python2,所以还需修改相关文件

vim /usr/bin/yum
vim /usr/libexec/urlgrabber-ext-down
将文件 #!/usr/bin/python修改为#!/usr/bin/python2即可

安装pip

wget https://bootstrap.pypa.io/get-pip.py
python get-pip.py