Reference where
my pip and pip3 are redirected Python3.7, to modify pip point to more trouble, so direct re-install a pip2 point Python2.7
Python2 first test is not what I want Python2.7
python2 -V
Download and install the 9.0.1 version pip2
wget https://pypi.python.org/packages/11/b6/abcb525026a4be042b486df43905d6893fb04f05aac21c32c638e939e447/pip-9.0.1.tar.gz#md5=35f01da33009719497f01a4ba69d63c9
tar -xf pip-9.0.1.tar.gz
cd pip-9.0.1
sudo python2 setup.py install
test
pip2 -V
