Centos8 installing python2.7

1、 install python2

dnf install python2

2、 Configure environment variables

vim /etc/profile
# To configure python Environmental Science 
PYTHON_HOME=/usr/bin/python2
PATH=$PYTHON_HOME/bin:$PATH
export PYTHON_HOME PATH

source /etc/profile
python2 -V
pip2 -V

# add to python2 The soft links 
ln -s /usr/bin/python2 /usr/bin/python
# add to pip2 The soft links 
ln -s /usr/bin/pip2 /usr/bin/pip