code: def y(self, y):
      raise UnsupportedOperationException(
          "Cannot set y on a DatasetView"
      )
  
imports: import torch
  import numpy
  from abc import ABC, abstractmethod
  from scipy.sparse import csr_matrix
  from small_text.base import LABEL_UNLABELED
  from small_text.data import DatasetView
  from small_text.data.datasets import check_size, check_target_labels, get_updated_target_labels
  from small_text.data.exceptions import UnsupportedOperationException
  from small_text.utils.annotations import experimental
  from small_text.utils.labels import csr_to_list, get_num_labels, list_to_csr
label_desc: Use image node_id 6 for calling the PytorchDatasetView obj's underlying member method code with example usage: obj.y(y) without return types