code: def __len__(self):
      return self.x.shape[0]
  
imports: from torch.utils.data import Dataset, DataLoader
  import torch
  import numpy
  from unittest import TestCase
  import pytest
  import tempfile
  from zoo.chronos.autots.model.auto_seq2seq import AutoSeq2Seq
  from zoo.orca.automl import hp
label_desc: Use image node_id 2 for calling the RandomDataset obj's underlying member method code with example usage: obj.__len__() and returns: self