def __exit__(self, exc_type, exc_val, exc_tb):
        try:
            return super(savepoint_sqlite, self).__exit__(
                exc_type, exc_val, exc_tb)
        finally:
            if self._orig_isolation_level == None:
                self.db.get_conn().isolation_level = self._orig_isolation_level
dataset/ETHPy150Open coleifer/peewee/peewee.py/savepoint_sqlite.__exit__/operator `is not` -> `==`