[Tkinter] Closing a window but not the whole program

[Larz60+]

you might be able to use lift and lower, which will hide it behind another widget, but of course you need to have another widget large enough to hide behind.
The other method is withdraw, which I believe doesn't actually delete the window and it can be restored. I have used withdraw, but have never tried to redraw a withdrawn window, it could be as simple as issuing another geometry command (place, pack or grid).
Google it for details.