Earlier quoted context omitted.
It's also why I prefer more "straightforward" libraries such as Tornado or CherryPy.
Wait, that's contrasting to other Python libraries that use the Rails/Spring magic? Which ones?
A lot of the development process consists of adding fields with particular names to classes that have a long inheritance chain of their own, and it's not trivial at all to understand what all of your options are and how they work behind the scenes.