from gi.repository import Gtk import common test = common.Test() test.show() box = Gtk.Box(orientation=Gtk.Orientation.HORIZONTAL) test.pack_start(box, True, False, 10) box.show() bar = Gtk.ProgressBar() bar.set_fraction(0.5) box.pack_start(bar, True, True, 10) bar.show() if __name__ == '__main__': common.main(test)