title: Python Tkinter menu bars don't display
body: <p>I'm trying to make a GUI using Tkinter and have come to implementing a menu bar. I've looked at a few tutorials and written some code for it, but a menu bar never seems to appear - just a blank frame with a white background. This doesn't just happen for my code though; on copying and pasting the code of one of the aforementioned tutorials into a new script, the same behaviour is exhibited.</p>
  
  <p>I'd appreciate it if anyone could shed any light on what's causing this. My system is OS X 10.5, Python 2.7, Tk 8.4. Here's the code from the tutorial that doesn't appear to work:</p>
  
  <pre><code>#!/usr/local/bin/python2.7
  
  from Tkinter import *
  from ttk import *
  
  class App(Frame):
      def __init__(self):
              Frame.__init__(self)
  
              self.master.geometry('400x300')
              self.master.title(__file__)
  
              self.pack()
  
              self.menu = Menu(tearoff=False)
              self.master.config(menu = self.menu)
  
              fm = self.file_menu = None
              fm = Menu(self.menu, tearoff=False)
              self.menu.add_cascade(label='File', menu = fm)
  
              fm.add_command(label='Say Hello', command = self.say_hello)
              fm.add_separator()
              fm.add_command(label='Quit', command = self.quit)
  
              self.mainloop()
  
      def say_hello(self, *e):
              self.label = Label(self.master, text='Hello there!')
              self.label.pack(anchor=CENTER, fill=NONE, expand=YES, side=LEFT)
  
  if __name__ == '__main__':
      App()
  </code></pre>
  
  <p>and my code is here:</p>
  
  <pre><code>from Tkinter import *
  
  class App(Frame):
  
      def __init__(self, parent):
          Frame.__init__(self, parent)
  
          parent.title("Cluedo Solver 1.0")
  
          menubar = Menu(root)
          menubar.add_command(label="File")
          menubar.add_command(label="Quit", command=root.quit())
  
          root.config(menu=menubar)
  
  root=Tk()
  root.geometry("300x250+300+300")
  app=App(root)
  root.mainloop()
  </code></pre>