@shinyformica, very interesting. I have wondered about the rapid prototyping aspect myself.
My first reaction is that you do not need to learn ObjC to use the necessary iOS capabilities in Pythonista. Just some syntax conversion tricks, and then look up the manual.
But I get that the intent is more to lower the barrier of entry.
In terms of using actual custom Swift code as part of your non-App Store-deployed Pythonista app, I guess we are out of luck.
And going via ObjC looks like a no go without including some generated header files.
@omz, @jonb, @dgelessus, any expert opinions?