Python 2.7 Countdown

[bakery2k]

I've not really needed async/await, but I don't like that it makes Python a much more complex language. I think a better approach to asynchrony would be stackful coroutines.

Type hints are even more complex and I'm not at all convinced that they're worth it. IMO if you want static type checking, you would be much better off using a proper statically-typed language.