Everyone should depend on “python3” or “python2”, never just “python”. They aren’t really the same language. python3 can’t run python2 scripts, nor vice versa,

Everyone should depend on “python3” or “python2”, never just “python”. They aren’t really the same language. python3 can’t run python2 scripts, nor vice versa, so no matter what you expected there will be systems on which you won’t get it.