Ubuntu 20.04: E: Unable to locate package python-pip

I don't believe python-pip exists anymore in 20.04, looks like it has been removed from the repositories and is removed during the upgrade from 18.04(in my case 19.10) to 20.04. Maybe the functionality of the package has been bundled with a different python package?

20.04 upgrade

Use pip3 instead of pip

I will assume you are using the Python3 version so you can install pip3 with

sudo apt-get install python3-pip

then you can install whatever you wanted starting with;

pip3 install

All the best :)