I actually went the other way around and used both Django and Rails as means to learn (or get deeper) in Python/Ruby languages. Both frameworks do a great work on abstracting bits of the language, which IMHO made it easier to start (I tried getting Python a couple of years before but gave up since I didn't have a good 'hello world' idea to keep me motivated - being able to build some useful web app also helped, when learning along with the framework)