How to fake type with Python

Question

I recently developed a class named DocumentWrapper around some ORM document object in Python to transparently add some features to it without changing its inter

Answer 1

It sounds like you want to test the type of the object your DocumentWrapper wraps, not the type of the DocumentWrapper itself. If that's right, then the interface to DocumentWrapper needs to expose that type. You might add a method to your DocumentWrapper class that returns the type of the wrapped object, for instance. But I don't think that making the call to isinstance ambiguous, by making it return True when it's not, is the right way to solve this.