'Creates and connects the button for the window'

def create_buttons(self):

    button_box = Gtk.Box()
    keep_right = Gtk.Button.new_with_label('Keep    RIGHT')
    keep_left = Gtk.Button.new_with_label('Keep    LEFT')
    quit = Gtk.Button.new_with_label('Quit')
    keep_right.connect('clicked', self.save, 'right')
    keep_left.connect('clicked', self.save, 'left')
    quit.connect('clicked', self.on_quit)
    space = Gtk.Box()
    button_box.pack_start(quit, False, False, 5)
    button_box.pack_start(space, True, True, 5)
    button_box.pack_start(keep_left, False, False, 5)
    button_box.pack_start(keep_right, False, False, 5)
    return button_box
