def save(self):
        tmp_path = self.path + '.tmp'
        with open(tmp_path, 'w') as f:
            f.write(json.dumps(self.body_labels.items()))
        os.rename(tmp_path, self.path)
def db_version_control(engine, abs_path, version=None):
    """Mark a database as under this repository's version control.

    Once a database is under version control, schema changes should
    only be done via change scripts in this repository.

    :param engine:  SQLAlchemy engine instance for a given database
    :param abs_path: Absolute path to migrate repository
    :param version:  Initial database version
    """
    repository = _find_migrate_repo(abs_path)
    versioning_api.version_control(engine, repository, version)
    return version