Example Program: Quitter


from Tkinter import *
from tkMessageBox import askokcancel
import sys

def quit():
    ans = askokcancel('Verify exit', "Really quit?")
    if ans:
        sys.exit()

root = Tk()
root.title("Quitter")
b = Button(root, text="Don't do it", 
                 font="times 24 normal", 
                 command = quit)
b.pack()
root.mainloop()