There is a lot of Theory behind the whole simulation stuff and so to get into actual code I will need to explain that first. I can't just create the matrices of the linear system with magic. Poof! After the Electromagnetism Background I will explain the structures that we will be using etc. while also studying how we get the matrices...

I don't think that it would make any sense to just make a division using Ohm's law in Python as it's just:
I = V / R
literally.
Haha!