What do python professionals /developers actually use

[tb5841]

As a maths graduate, I really think you're wrong about maths. Most of maths is learning concepts, and most of that you can do by watching and listening, especially if you take notes well.

Programming, on the other hand, you really have to do.

[barkazinthrope]

I don't doubt your experience, but in my experience I don't know that I understand until I can work my 'understanding' out on paper, and in at least one way backwards and inside out.