import gi
gi.require_version("Gtk", "3.0")
from gi.repository import Gtk

def main():
	w = Gtk.Window(type=Gtk.WindowType.TOPLEVEL)
	w.set_title("Window Iconify")
	w.set_size_request(320, 200)
	w.set_position(Gtk.WindowPosition.CENTER)
	w.set_decorated(False)
	w.connect("delete_event", Gtk.main_quit)
	b = Gtk.Button(label="Iconify")
	b.connect('clicked', lambda b : w.iconify())
	w.add(b)
	w.show_all()
	Gtk.main()

if __name__ == "__main__":
	main()