That's what I'm a bit afraid of - that it will feel awkward to people without prior Python experience. I have spent a considerable amount of time developing in Python, so the way empty interface is written looks natural to me.
I program in Python professionally, and it still feels a bit awkward. :/ I don't want to make this a bigger deal than it is, but I'm not sure that you gain much by adhering to the Python syntax. That's just my $0.02. I'm excited to play around with it though. :)