You pretty much always need to import things first : https://xkcd.com/353/ :D

I'm extremely tempted to try typing import antigravity into my code now :D

Actually, do try it. It links you to that comic.

Also try

import this

That should be in every tutorial even before the hello world.

Tutorials are often lacking. For instance, none seems to deal virtual environments, one of the most important concepts of python.

That's probably because before python 3.3 virtual environments were a third party solution and not part of the standard library. When we finally get good python 3 tutorials maybe they'll include venv.