This article will/shall always be inline for the sole purpose of keeping python up-to-date, and to the latest, greatest stable as always as possible version. We shall strictly speak to Ubuntu here I mean any version 19.10+(Eoan Ermine) at the time of writing and beyond in the upcoming future, however this might also work for Debian, Linux mint and its derivatives too, but your mileage might vary as per the repositories updated and as maintained d by he respective developers