google app engine - Architecture guidance for appengine websites? -

I created unmaintainable websites using PHP because it was easy to work very easy and dirty I used Google's appenin But do not want to do the same thing with Python / Dzeng.

Is there a good architecture reference for creating websites using Django and Appengine? (For example, where business logic, where to use logic data, how to explicitly separate thoughts, how to do unit tests, etc.)

From its nature, the jaggers must have made it difficult to put things in the wrong places, this new generation of MVC framework One of the good things about, you have to work to make it a ball of soil.