import dbus
BUS_NAME = 'org.freedesktop.Notifications'
OBJ_PATH = '/org/freedesktop/Notifications'
IFACE_NAME = 'org.freedesktop.Notifications'
bus = dbus.SessionBus()
notify_obj = bus.get_object(BUS_NAME,OBJ_PATH)
notifications = dbus.Interface(notify_obj,IFACE_NAME)
notifications.Notify("Software Update", 0, "", "New activities are available!", "Please check your activities list", [], {'x-sugar-icon-name': 'module-updater'}, -1)