Completely agree. I wanted to learn Python, so I decided to write a book about it. In the end I published it and now I have two achievements: knowing python and

Completely agree. I wanted to learn Python, so I decided to write a book about it. In the end I published it and now I have two achievements: knowing python and having written a book. I would have never learned so many things up to this depth, if I didn't have to teach them.