#!/usr/bin/env python

import gtk

# This function will be called whenever you click on your button:
def click_handler(widget) :
    # quit the application:
    gtk.main_quit()

# Create the main window:
win = gtk.Window()

# Organize widgets in a vertical box:
vbox = gtk.VBox()
win.add(vbox)

# Make a pushbutton:
button = gtk.Button("Push me!")

# When it's clicked, call our handler:
button.connect("clicked", click_handler)

# Add it to the window:
vbox.pack_start(button)
button.show()

# Obey the window manager quit signal:
win.connect("destroy", gtk.main_quit)

vbox.show()
win.show()
gtk.main()