PyGIWarning: Gtk was imported without specifying a version first.

[Enkhbayar Doljinsuren]

PyGIWarning: Gtk was imported without specifying a version first. Use gi.require_version('Gtk', '3.0') before import to ensure that the right version gets loaded.
from gi.repository import Gtk, GLib
Traceback (most recent call last):
File "indicator.py", line 5, in
from gi.repository import AppIndicator3 as AppIndicator
ImportError: cannot import name AppIndicator3