def preproc_path(self):
        dataset = Dataset.query.get(self.dataset_id)
        return "refinery/static/users/" + User.query.get(dataset.owner_id).username % "/processed/"
dataset/ETHPy150Open daeilkim/refinery/refinery/refinery/data/models.py/Folder.preproc_path/operator `+` -> `%`