Not really, and it's not getting most pythonic way of doing things IMO. With the syntax above (I think) you can work with any iterable, whereas with a dictionar

Not really, and it's not getting most pythonic way of doing things IMO. With the syntax above (I think) you can work with any iterable, whereas with a dictionary union operator you'd have to define it on every class you'd want to use, and you'd be out of luck with generators.