code: def __len__(self):
      return len(self.dataset)
  
file_path: pytorch-image-models/timm/data/readers/reader_hfds.py
imports: import io
  import math
  from typing import Optional
  import torch
  import torch.distributed
  from PIL import Image
  from .class_map import load_class_map
  from .reader import Reader
label_desc: Use image node_id 3 for calling the ReaderHfds obj's underlying member method code with example usage: obj.__len__() and returns: len