def make_uuid(mapper, connection, target):
    if hasattr(target, 'id') and target.id is None:
        if type(mapper.columns.get('id').type) is not GUID:
            target.id = uuid.UUID(bytes=os.urandom(16))
dataset/ETHPy150Open sjuxax/raggregate/raggregate/models/__init__.py/make_uuid/operator `is` -> `is not`