def delete(self, doc):
        if doc.id is None:
            raise DatabaseException('Document does not have id')
        if doc.sid is None:
            try:
                rs = self.db.docs.remove({'id': doc.id}, safe=True)
                assert rs['n'] == 1
            except Exception as e:
                raise DatabaseException(e)
            return None
        doc.data = None
        return self.update(doc)
def report(world, counts, log_time):
    report = world.report()
    log = {
        'missing_text': counts['missing_text'],
        'missing_labels': counts['missing_labels'],
        'missing_label_candidates': counts['missing_label_candidates'],
        'empty_string_label_candidates': counts['empty_string_label_candidates'],
        'label_candidates_with_missing_label': counts[
            'label_candidates_with_missing_label'
        ],
        'did_not_return_message': counts['did_not_return_message'],
    }
    text, log = log_time.log(report['exs'], world.num_examples(), log)
    return text, log