Code below has 1 major and 1 minor problem. Major issue is, once you push the button it visually stays pushed. Minor problem is, I run this in Cygwin. I've got an rxvt window behind the Tk window.

In Python's tkinter, 'self' is a 'name tag used to point to the object (component or screen) that you are currently operating on.'The reason 'self' is necessary is so that multiple buttons or screens ...