Interesting, but I have a hard time accepting this. If I accept a type of iterable I would either check isinstance and do separate methods or check isinstance

Interesting, but I have a hard time accepting this. If I accept a type of iterable I would either check isinstance and do separate methods or check isinstance and convert to a single type and operate on it. On the other hand, I also try to minimize accepting multiple types of iterable. I don't do that very often except in the case of list and tuple. Since these two types are very very similar in nature I call a separate method in my code to handle the two types. That's okay, just a few extra lines. I don't really understand the benefit of mm and dispatch. This sounds useful for building routes in webapp. But for library, it sounds like we are bringing back C++'s single interface, multiple types... I don't even remember what that is called.