How to change a list of supported Python versions?
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

* Open debian/debian_defaults file and change `supported-versions` variable,
  separating multiple values by comma
* Open debian/control.in file and edit python3-all, python3-all-dev and
  python3-all-dbg's Depends line (add or remove pythonX.Y packages)


How to change default Python version?
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

* Open debian/debian_defaults file and change `default-version` variable