I don't know enough about Django's API to speak intelligently, but I have 15 years of Python experience and (except when APIs require it) it's perfectly easy to

I don't know enough about Django's API to speak intelligently, but I have 15 years of Python experience and (except when APIs require it) it's perfectly easy to write Python code without using inheritance (and your code base will be better because of it). If Django or whatever requires using inheritance, you have my sympathy, and I'm not arguing that you should go to great lengths to avoid it--I'm arguing that from a language design perspective inheritance is a mistake.