'modal dialogs' with Tkinter

[Sean McIlroy]

I'd like to have a function f such that, when f is invoked, a Tk
window w is presented in which a number of variables can be modified,
and f returns the values that are indicated by the relevant
menus/checkbuttons/etc at the time w gets closed. I've tried various
ways of doing this, without success. Any assistance would be greatly
appreciated.

Peace,
Sean McIlroy