PIP3 не найден
sudo apt-get remove python3-pip; sudo apt-get install python3-pip
Cautious Crocodile
sudo apt-get remove python3-pip; sudo apt-get install python3-pip
python -m ensurepip
##possibly the best way to autmatically install pip, if it is not found #for pip, and not pip3:
sudo apt-get install python-pipapt-get install python3-pip