PYTHON

uninstall package with pip

##in console write: pip uninstall <packagename>
pip uninstall <packagename>

pip uninstalled itself

#the best way to install pip if uninstalled is using the following command

python -m ensurepip

# not only it will check whether there is pip installed , it will install 
# for you if not found

pip uninstalled

To install it again : python -m pip install --upgrade pip

how to uninstall pip

This is in windows command prompt or powershell
python -m ensurepip --upgrade