notifications.py

import gi
from gi.repository import GLib
import dbus
from dbus.mainloop.glib import DBusGMainLoop

def print_notification(bus, message):
	keys = ["app_name", "replaces_id", "app_icon", "summary",
			"body", "actions", "hints", "expire_timeout"]
	args = message.get_args_list()
	if len(args) == 8:
		notification = dict([(keys[i], args[i]) for i in range(8)])
		print(notification["summary"], notification["body"])
	else:
		print("Unknown notification")
		print(args)


loop = DBusGMainLoop(set_as_default=True)
session_bus = dbus.SessionBus()
session_bus.add_match_string("type='method_call',interface='org.freedesktop.Notifications',member='Notify'")
session_bus.add_message_filter(print_notification)

GLib.MainLoop().run()