from gi.repository import Gtk # UI elements left_label = Gtk.Label() right_label = Gtk.Label() def create_bottom(area): left_label.set_label("Bottom left") right_label.set_label("Bottom right") left_label.set_halign(1) right_label.set_halign(2) area.pack_start(left_label, True, True, 0) area.pack_start(right_label, True, True, 0)