So what the heck is pip after all?
sudo apt install python3-pip sudo pip3 install --upgrade pip setuptools sudo apt update&& sudo apt upgrade python-pip
Upgrade pip with pip and change the link as shown:
apt-get install python-pip pip install --upgrade pip pip --version ln -s /usr/local/bin/pip /usr/bin/ pip --version
Like above, but now use python -m pip
pip install --upgrade pip pip --version python -m pip --version
easy_install -U pip pip --version
on Windows use Chocolatey, and on macOS use homebrew !