Exiting/killing a program with tkinter but leaving the graphic on the screen

[jpezz]

I want the opposite of what most people want. I call a python subprogram to put a tk label on the screen. I want that program to terminate itself when it outputs the label (best) or to be sent a "kill" signal from the parent that will terminate the program but leave the label on the screen. Is that possible?

Note that the label is not interactive (i.e. not a button or anything that returns a value).

Note that the label will not have any titlebar. ".overrideredirect(1)"