The more I use Python the more I like it. It allows a lot of the early refactorings needed for a proof of concept prototype. Playing with it feels like playing with a well lubrificated rubix cube, it rotates well in all directions, allowing quick changes in the code's structure. I can't tell exactly why but I think the use of "self" in object methods, while a bit weird in the begining, is one of the best part. Eg morphing a helper function into a method is just a matter of one search and replace.