code: def __len__(self) -> int:
      return len(self.data)
  
imports: import os
  from typing import Any, Callable, Dict, List, Optional, Tuple, Union
  from PIL import Image
  from .utils import check_integrity, download_and_extract_archive, download_url, verify_str_arg
  from .vision import VisionDataset
label_desc: Use image node_id 7 for calling the _LFW obj's underlying member method code with example usage: obj.__len__() and returns: len