import gtk
import sys

w  = gtk.Window()
b1 = gtk.Button("Button 1")
b2 = gtk.Button("Click Me")
v  = gtk.VBox()

v.pack_start(b1)
v.pack_start(b2)
w.add(v)

b1.connect("clicked", lambda b: sys.stdout.write("hello world\n"))
b1.connect("clicked", lambda b: sys.stdout.write("I was clicked\n"))
b2.connect("clicked", lambda b: gtk.main_quit())
w.show_all()
gtk.main()