Gnome 3 inhibitor for VLC (Python)

gnome-inhibitor-vlc.py

#!/usr/bin/python
# -*- coding: utf-8 -*-

import os
import sys
import dbus

class inhibitor:
    def __init__(self):
        bus = dbus.SessionBus()
        self.cookie = None
        self.proxy = bus.get_object('org.gnome.SessionManager', '/org/gnome/SessionManager')
    def start(self):
        if self.cookie == None:
            self.cookie = self.proxy.Inhibit('vlc', dbus.UInt32(0), 'VLC has disabled the screensaver', dbus.UInt32(8))
    def stop(self):
        if self.cookie != None:
            self.proxy.Uninhibit(self.cookie)
            self.cookie = None

inhibitor = inhibitor()
inhibitor.start()
arguments = ' '.join(sys.argv[1:])
if len(arguments) == 0:
    command = '/usr/bin/vlc'
else:
    command = '/usr/bin/vlc "%s"' % (arguments)
os.system(command)
inhibitor.stop()