All-on, all-off button for checkbuttons?

[Nick Arnett]

Thanks -- I suspected there was something along those lines.  I think it
should work.  I'm using Tkinter, which I should have mentioned.

...

> Depending on the GUI you're using, there should probably
> be a way to find all objects on a form/frame, and loop over
> them. That would be another way to do it.

That's what I was after -- how to loop through them and do the comparison
operation to see if the object is a Checkbutton.

Nick