#!/usr/bin/python2 import gtk def f(w): print hello window = gtk.Window() window.connect('delete-event', gtk.main_quit) box = gtk.VBox(False, 10) button = gtk.Button("Hello") button.connect('clicked', f) button2 = gtk.Button("World") box.pack_start(button, False) box.pack_start(button2, False) window.add(box) window.show_all() gtk.main()