 | Event bindings call functions that take an event object as argument:
self.parent.bind('<q>', self.quit)
def quit(self,event): # the event arg is required!
self.parent.quit()
|
| Button must call a quit function without arguments:
def quit():
self.parent.quit()
quit_button = Button(frame, text='Goodbye, GUI World!',
command=quit)
|
