import gtk

w = gtk.Window()
w.set_default_size(200, 200)
w.realize()
w.show()
c = w.window.cairo_create()
c.set_source_rgb(255, 0, 0)
c.move_to(0, 1)
c.line_to(50, 50)
c.stroke()
c.get_target().write_to_png('noobs.png')
gtk.main()