pip2

curl https://bootstrap.pypa.io/pip/2.7/get-pip.py -o get-pip.py 


sudo python2 get-pip.py


pip -V
pip 20.3.4 from /Library/Python/2.7/site-packages/pip (python 2.7)

pip3

curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py


sudo python3 get-pip.py


pip3 -V
pip 21.2.4 from /usr/local/lib/python3.9/site-packages/pip (python 3.9)

curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py