self.temporary = temporary

        if leveldict:

            self.levels = leveldict

        else:

            self.levels = {}

            self.reload(quiet=True, graph=graph)

        if not self.temporary:

            dispatcher.connect(self.reload, 'reload all subs')

    def reload(self, quiet=False, graph=None):

        if self.temporary:

            return

        try:

            oldlevels = self.levels.copy()

            self.levels.clear()

            patchGraph = showconfig.getGraph()

            if graph is None:

                graph = Graph()

                graph.parse(showconfig.subFile(self.name), format="nt")

            self.uri = L9['sub/%s' % self.name]

            for lev in graph.objects(self.uri, L9['lightLevel']):

                chan = graph.value(lev, L9['channel'])

                val = graph.value(lev, L9['level'])

                name = patchGraph.label(chan)

                self.levels[name] = float(val)

            if (not quiet) and (oldlevels != self.levels):

                print "sub %s changed" % self.name

        except IOError, e:

            print "Can't read file for sub: %r (%s)" % (self.name, e)

    def save(self):

        if self.temporary:

            print "not saving temporary sub named",self.name

            return

        graph = Graph()

        subUri = L9['sub/%s' % self.name]

        graph.add((subUri, RDFS.label, Literal(self.name)))

        for chan in self.levels.keys():

            try:

                chanUri = Patch.get_channel_uri(chan)

            except KeyError:

                print "saving dmx channels with no :Channel node is not supported yet. Give channel %s a URI for it to be saved. Omitting this channel from the sub." % chan

                continue

            lev = BNode()

            graph.add((subUri, L9['lightLevel'], lev))

            graph.add((lev, L9['channel'], chanUri))

            graph.add((lev, L9['level'],