def selective_search_IJCV_roidb(self):
        cache_file = os.path.join(self.cache_path,
                '{:s}_selective_search_IJCV_top_{:d}_roidb.pkl'.
                format(self.name, self.config['top_k']))

        if os.path.exists(cache_file):
            with open(cache_file, 'rb') as fid:
                roidb = cPickle.load(fid)
            print '{} ss roidb loaded from {}'.format(self.name, cache_file)
            return roidb

        gt_roidb = self.gt_roidb()
        ss_roidb = self._load_selective_search_IJCV_roidb(gt_roidb)
        roidb = datasets.imdb.merge_roidbs(gt_roidb, ss_roidb)
        with open(cache_file, 'wb') as fid:
            cPickle.dump(roidb, fid, cPickle.HIGHEST_PROTOCOL)
        print 'wrote ss roidb to {}'.format(cache_file)

        return roidb
Check the generation of the comment history
dataset/ETHPy150Open rbgirshick/fast-rcnn/lib/datasets/pascal_voc.py/pascal_voc.selective_search_IJCV_roidb--crossover with--dataset/ETHPy150Open edgewall/trac/trac/ticket/tests/model.py/TicketCommentEditTestCase.test_comment_history