code: def __len__(self) -> int:
      entries = self._get_entries()
      assert len(entries) == self.split.length
      return len(entries)
  
imports: import csv
  from enum import Enum
  import logging
  import os
  from typing import Callable, List, Optional, Tuple, Union
  import numpy
  from .extended import ExtendedVisionDataset
label_desc: Use image node_id 19 for calling the ImageNet obj's underlying member method code with example usage: obj.__len__() and returns: len