I went straight to the "code" section. Didn't know there was stuff in the "construction" section too. I would definitely consider not using sklearn for anything other than data sets. You already defined them, why not use them? Or rename the "code" section. I expected that to be the final code as you build it. Maybe show the usage of both side by side, as a way to ease people into sklearn. But the "code" section should totally be focused on what you made.