Logout and Shutdown

shutdown.py

#!/usr/bin/env python3

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

class Shutdown(Gtk.Window):
    def __init__(self):
        Gtk.Window.__init__(self, title="Desligar o PC")
        self.set_border_width(10)
        self.set_size_request(300,50)
        self.set_position(Gtk.WindowPosition.CENTER_ALWAYS)

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

        button = Gtk.ToggleToolButton(label="Desligar", use_underline=True)
        #button.set_active(True)
        button.connect("toggled", self.on_button_one_toggled, "1")
        hbox.pack_start(button, True, True, 0)

        button = Gtk.ToggleToolButton(label="Logout", use_underline=True)
        #button.set_active(True)
        button.connect("toggled", self.on_button_two_toggled, "2")
        hbox.pack_start(button, True, True, 0)

    def on_button_one_toggled(self, button):
        if  button.get_active():
            os.system('shutdown -h now')

    def on_button_two_toggled(self, button):
        if  button.get_active():
            os.system('pkill -U $USER')

win = Shutdown()
win.connect("destroy", Gtk.main_quit)
win.show_all()
Gtk.main()