Python version switching

Install multiple versions of python on ubuntu

sudo apt-get install python3.8
sudo apt-get install python3.9

Switch the current default python version

sudo update-alternatives --install /usr/bin/python3 python3 /usr/bin/python3.8 1
sudo update-alternatives --install /usr/bin/python3 python3 /usr/bin/python3.9 2
sudo update-alternatives --config python3

PIP installation

sudo apt-get install python3-pip

Problems that arise

from distutils.util import strtobool
ModuleNotFoundError: No module named 'distutils.util'

Solution

sudo apt-get install python3-distutils
python3 -m pip install --upgrade pip