Install Updated pip in Ubuntu 16.04 - 1412kauti/martii GitHub Wiki
Remove any existing versions of pip
sudo apt remove python-pip
sudo apt autoremove
Install Updated pip (v20.x)
curl https://bootstrap.pypa.io/pip/2.7/get-pip.py | python
sudo apt remove python-pip
sudo apt autoremove
curl https://bootstrap.pypa.io/pip/2.7/get-pip.py | python