Python on Rails?
This is a great blog post. Rails developers chose a framework, and coding in Ruby is the afterthought.
Python developers chose the language for the language, not the framework. On the other hand, that made a lot lower bar to entry for frameworks.
Many of the methodology used in Rails has been translated into Django. Have you tried it?
I think one of the things that people like about RoR is the domain-specific language (DSL) style of programming. This is something that Ruby is much better at than Python.