Python - Alarm Hide Function

from Tkinter import *class AlarmFrame(Frame):    def repeater(self):                                  self.bell()                                      self.after(self.msecs, self.repeater)        def __init__(self, msecs=1000):                      Frame.__init__(self)        self.msecs = msecs        self.pack()        stopper = Button(self, text='Stop the beeps!', command=self.quit)        stopper.pack()        stopper.config(bg='red', fg='white', bd=8)         self.stopper = stopper        self.repeater()class AlarmHide(AlarmFrame):   def repeater(self):      self.bell()      if self.shown:         self.stopper.pack_forget()      else:         self.stopper.pack()      self.shown = not self.shown      self.after(self.msecs, self.repeater)   def __init__(self, msecs=1000):      self.shown = 0      AlarmFrame.__init__(self, msecs)if __name__ == '__main__':   AlarmHide(msecs=500).mainloop()