Updated 28-Jun-2024
First up, Python 2 is dead dead dead. Long live Python 3. Here are some steps to perform:
Update alternatives for Python
update-alternatives --remove python /usr/bin/python2
update-alternatives --install /usr/bin/python python /usr/bin/python3 10
Edit ~/.bashrc to include an alias to python3
nano ~/.bashrc
alias python=python3
Install the python-is-python3 application
sudo apt install python-is-python3