def build_menu():
menu = Gtk.Menu()
#brightness
item_brightness_up = Gtk.MenuItem('Increase Brightness')
item_brightness_up.connect('activate', increase_brightness)
menu.append(item_brightness_up)
item_brightness_down = Gtk.MenuItem("Decrease Brightness")
item_brightness_down.connect('activate', decrease_brightness)
menu.append(item_brightness_down)
#rotate
item_rotate = Gtk.MenuItem('Rotate')
item_rotate.connect('activate', rotate_screen)
menu.append(item_rotate)
#flip
item_flip = Gtk.MenuItem('Flip')
item_flip.connect('activate', flip_screen)
menu.append(item_flip)
#seperator
seperator = Gtk.SeparatorMenuItem()
menu.append(seperator)
#quit
item_quit = Gtk.MenuItem('Quit')
item_quit.connect('activate', quit)
menu.append(item_quit)
menu.show_all()
return menu
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