# Author:  James Tam
# Version: November 21, 2013
#

from tkinter import *

aWindow = Frame()
aButton = Button(aWindow)

def start ():
    global aWindow
    global aButton

    aWindow.pack()
    aButton["text"] = "Press me"
    aButton["command"] = button_clicked
    aButton.grid(row=0, column=0)
    aWindow.mainloop()

start()