Python Guide / Document?

[Qui_Ten]

I'm trying to get into programming by learning Python and there's a video that mentions something like an official Python guide, but I couldn't find such thing, could someone please link me that guide? thank you

This is the part of the video that I'm talking about:
https://youtu.be/5mJ_Qftw2_0?t=109

[Gribouillis]

Here it is: The Python Tutorial