# Creating a window with a menu bar
# This creates the menu hierarchy:
#
# File        Hello
#   |_Open      |_Say Hello
#   |______
#   |_Exit
#
# This code inspired by
# http://www.pythonware.com/library/tkinter/introduction/x5819-patterns.htm

from Tkinter import *

root = None

def hello():
    print "hello!"
   
def main():
    global root
    root = Tk()

    # Just put something in the window
    lbl = Label(root, text="test")
    lbl.pack()
    
    # create a toplevel menu
    menubar = Menu(root)

    # create a pulldown menu, and add it to the menu bar
    filemenu = Menu(menubar)                          # Create the file menu
    filemenu.add_command(label="Open", command=hello) # Add a command
    filemenu.add_separator()                          # Add a separator
    filemenu.add_command(label="Exit", command=root.destroy) # Add another command
    menubar.add_cascade(label="File", menu=filemenu)  # Add the menu to the menubar

    # Create another menu item named Hello and add to the menu
    helloMenu = Menu(menubar)
    helloMenu.add_command(label="Say hello", command=hello)
    menubar.add_cascade(label="Hello", menu=helloMenu)

    # display the menu
    root.config(menu=menubar)  
    
    root.mainloop()

main()