To be honest, I still don't get it. He says, "Such and such will help you understand closures" and then a few lines of python, then suddenly, "because start_pos

To be honest, I still don't get it. He says, "Such and such will help you understand closures" and then a few lines of python, then suddenly, "because start_pos is a closure". Which, really, still doesn't explain what he means. That and for the love of god, I hate things such as Clojure. Call me a stick in the mud, but I like languages in which I don't have to mentally expand 80% of words.