Looking at the scipy directory, I see how they've organized their data. What I'm missing is how everything is connected. Any tips on educational material teac

Looking at the scipy directory, I see how they've organized their data. What I'm missing is how everything is connected. Any tips on educational material teaching how to connect all the pieces? For example, to use scipy, I know I need to import it. What I don't know is what happens behind the scenes that allows the imported module to connect to everything else.