How to change the symbology of a single layer at a transition from one scale to anoth

Hello,

I would like to assign two different symbology through a scale to another with Python programing.

I will explain, I have a buildings layer in the Luxembourg country. the full extent of the country is a 1:500 000, I want the polygone appear without contour from scale 1:500 000 to 1:10 000. And from 1:10 000 scale to 0, I want an outline appears around polygons.

I've never done python programing, so I do not know what to do, which is why I have given details, if someone could help me, I would be grateful.