> Say you are talking about the function to build the user interface, can you stop defining that, go back and define the callback, then continue defining the gu

> Say you are talking about the function to build the user interface, can you stop defining that, go back and define the callback, then continue defining the gui builder function? That's how lisp folks worked. I don't see why that technique wouldn't work in bare python as well. Static type systems can make that difficult. How many frameworks impose analogous constraints?