How to use the gconf.CLIENT_PRELOAD_ONELEVEL function in gconf

def __init__(self, root, defaults):
		self.gconf = gconf.client_get_default()
		self.gconf.add_dir(root, gconf.CLIENT_PRELOAD_ONELEVEL)
		self.root = root
		self.defaults = defaults

def __init__(self, root, defaults):
		self.gconf = gconf.client_get_default()
		self.gconf.add_dir(root, gconf.CLIENT_PRELOAD_ONELEVEL)
		self.root = root
		self.defaults = defaults

def __init__(self, dbus_client):
        """
        Begin listening on gconf, sending signals through the given D-Bus
        client.
        """
        self.client = gconf.client_get_default()
        self.client.add_dir(GCONF_DIR, gconf.CLIENT_PRELOAD_ONELEVEL)
        self.dbus_client = dbus_client
        self.client.notify_add(GCONF_NOTIFY_KEY, self.notify_callback)
        self.client.notify_add(GCONF_INTERVAL_KEY, self.interval_callback)
        self.client.notify_add(GCONF_WALLPAPER_KEY, self.wallpaper_callback)