class_docstr: Dataset class for classification task.
class_docstr_tok: ["Dataset","class","for","classification","task","."]
code: def __init__(self):
      raise NotImplementedError
  
file_path: dgl/examples/pytorch/transformer/dataset/__init__.py
imports: import os
  import random
  from .fields import *
  from .graph import *
  from .utils import prepare_dataset
label_desc: Use image node_id 1 to create a new ClassificationDataset object from inherited base classes: object with example: obj = ClassificationDataset()