#!/usr/bin/python1.5
# File: menu-example-4.py

from Tkinter import *

root = Tk()

def hello():
    print "hello!"

# create a popup menu
menu = Menu(root, tearoff=0)
menu.add_command(label="Undo", command=hello)
menu.add_command(label="Redo", command=hello)

# create a canvas
frame = Frame(root, width=512, height=512)
frame.pack()

def popup(event):
    menu.post(event.x_root, event.y_root)

# attach popup to canvas
frame.bind("<Button-3>", popup)

mainloop()