Larry,

> Also, I assumed that anything that had a __text_signature__ wasn't going to have any other kind of signature information.  Therefore, if the object had a __text_signature__ attribute, then I already knew that's the best approach and it should definitely be first.

I think that __text_signature__ is similar to the __signature__ attribute, i.e. if an object has it, then it should blindly use it, without trying anything else (where __signature__ should have a higher priority than __text_signature__)