code: def __init__(self, *lists_of_data):
      assert all(len(lists_of_data[0]) == len(d) for d in lists_of_data)
      self.lists_of_data = lists_of_data
  
file_path: dgl/examples/pytorch/rrn/sudoku_data.py
imports: import csv
  import os
  import urllib.request
  import zipfile
  from copy import copy
  import dgl
  import numpy
  import torch
  from torch.utils.data import DataLoader, RandomSampler, SequentialSampler
  from torch.utils.data.dataset import Dataset
label_desc: Use image node_id 1 to create a new ListDataset object from inherited base classes: Dataset with example: obj = ListDataset()