from gi.repository import Gtk


class RadioButtonWindow(Gtk.Window):

    def __init__(self):
        Gtk.Window.__init__(self, title="RadioButton Demo")
        self.set_border_width(10)

        hbox = Gtk.Box(spacing=6)
        self.add(hbox)

        button1 = Gtk.RadioButton.new_with_label_from_widget(None, "Button 1")
        button1.connect("toggled", self.on_button_toggled, "1")
        hbox.pack_start(button1, False, False, 0)

        button2 = Gtk.RadioButton.new_from_widget(button1)
        button2.set_label("Button 2")
        button2.connect("toggled", self.on_button_toggled, "2")
        hbox.pack_start(button2, False, False, 0)

        button3 = Gtk.RadioButton.new_with_mnemonic_from_widget(button1, "Button 3")
        button3.connect("toggled", self.on_button_toggled, "3")
        hbox.pack_start(button3, False, False, 0)

    def on_button_toggled(self, button, name):
        if button.get_active():
            state = "on"
        else:
            state = "off"
        print("Button", name, "was turned", state)


window = RadioButtonWindow()
window.connect("delete-event", Gtk.main_quit)
window.show_all()
Gtk.main()