def requires_returning(method):
        def inner(self, *args, **kwargs):
            db = self.model_class._meta.database
            if not db.returning_clause:
                raise ValueError('RETURNING is not supported by your '
                                 'database: %s' + type(db))
            return method(self, *args, **kwargs)
        return inner
dataset/ETHPy150Open coleifer/peewee/peewee.py/_WriteQuery.requires_returning/operator `%` -> `+`