def extend_mondrian(self, data, train_ids_new, settings, param, cache):
        self.extend_mondrian_block(self.root, train_ids_new, data, settings, param, cache)
        if settings.debug:
            print 'completed extend_mondrian'
            self.check_tree(settings, data)
extend Mondrian tree to include new training data indexed by train_ids_new
dataset/ETHPy150Open balajiln/mondrianforest/src/mondrianforest.py/MondrianTree.extend_mondrian