How to use the gconf.CLIENT_PRELOAD_RECURSIVE function in gconf

def __init__(self, guake):
        """Constructor of GConfHandler, just add the guake dir to the
        gconf client and bind the keys to its handler methods.
        """
        self.guake = guake

        client = gconf.client_get_default()
        client.add_dir(GCONF_PATH, gconf.CLIENT_PRELOAD_RECURSIVE)

        notify_add = client.notify_add

        # these keys does not need to be watched.
        # notify_add(KEY('/general/default_shell'), self.shell_changed)
        # notify_add(KEY('/general/use_login_shell'), self.login_shell_toggled)
        # notify_add(KEY('/general/use_popup'), self.popup_toggled)
        # notify_add(KEY('/general/window_losefocus'), self.losefocus_toggled)
        # notify_add(KEY('/general/use_vte_titles'), self.use_vte_titles_changed)
        # notify_add(KEY('/general/quick_open_enable'), self.on_quick_open_enable_changed)
        # notify_add(KEY('/general/quick_open_in_current_terminal'),
        #   self.on_quick_open_in_current_terminal_changed)

        # Notification is not required for mouse_display/display_n because
        # set_final_window_rect polls gconf and is called whenever Guake is
        # shown or resized

def __init__ (self, term, settings = {}):
    self.defaults['link_user'] = self.defaults['_link_user']%(self.defaults['link_userchars'], self.defaults['link_passchars'])

    # Set up any overridden settings
    for key in settings.keys ():
      defaults[key] = settings[key]

    self.term = term
    self.profile = self.defaults['profile_dir'] + self.defaults['profile']

    self.gconf_client = gconf.client_get_default ()
    self.gconf_client.add_dir (self.profile, gconf.CLIENT_PRELOAD_RECURSIVE)
    self.gconf_client.add_dir ('/apps/metacity/general', gconf.CLIENT_PRELOAD_RECURSIVE)

    self.clipboard = gtk.clipboard_get (gtk.gdk.SELECTION_CLIPBOARD)

    self._vte = vte.Terminal ()
    self._vte.set_size (5, 5)
    self.reconfigure_vte ()
    self._vte.show ()

    self._box = gtk.HBox ()
    self._scrollbar = gtk.VScrollbar (self._vte.get_adjustment ())
    if self.defaults['scrollbar']:
      self._scrollbar.show ()

    self._box.pack_start (self._vte)
    self._box.pack_start (self._scrollbar, False)

def __init__ (self, term, settings = {}):
    self.defaults['link_user'] = self.defaults['_link_user']%(self.defaults['link_userchars'], self.defaults['link_passchars'])

    # Set up any overridden settings
    for key in settings.keys ():
      defaults[key] = settings[key]

    self.term = term
    self.profile = self.defaults['profile_dir'] + self.defaults['profile']

    self.gconf_client = gconf.client_get_default ()
    self.gconf_client.add_dir (self.profile, gconf.CLIENT_PRELOAD_RECURSIVE)
    self.gconf_client.add_dir ('/apps/metacity/general', gconf.CLIENT_PRELOAD_RECURSIVE)

    self.clipboard = gtk.clipboard_get (gtk.gdk.SELECTION_CLIPBOARD)

    self._vte = vte.Terminal ()
    self._vte.set_size (5, 5)
    self.reconfigure_vte ()
    self._vte.show ()

    self._box = gtk.HBox ()
    self._scrollbar = gtk.VScrollbar (self._vte.get_adjustment ())
    if self.defaults['scrollbar']:
      self._scrollbar.show ()

    self._box.pack_start (self._vte)
    self._box.pack_start (self._scrollbar, False)

def __init__(self):
        self._parse_username()
        try:
            self._gconf_client = GConf.Client.get_default()
            self._gconf_client.add_dir(GCONF_DIR, GConf.ClientPreloadType.PRELOAD_RECURSIVE)
        except Exception as e:
            self._gconf_client = gconf.client_get_default()
            self._gconf_client.add_dir(GCONF_DIR, gconf.CLIENT_PRELOAD_RECURSIVE)

        self._init_config()

def get_wallcolor(width, height):
	import gconf
	client = gconf.client_get_default()
	client.add_dir("/desktop/gnome/background", gconf.CLIENT_PRELOAD_RECURSIVE)
	value = client.get("/desktop/gnome/background/primary_color")
	color = value.get_string()

	pbuf = gtk.gdk.Pixbuf(0, 1, 8, width, height)
	c = gtk.gdk.color_parse(color)
	fillr = (c.red / 256) << 24
	fillg = (c.green / 256) << 16
	fillb = (c.blue / 256) << 8
	fillcolor = fillr | fillg | fillb | 255
	pbuf.fill(fillcolor)

	return pbuf