docstr: Number of images.
docstr_tok: ["Number","of","images","."]
code: def __len__(self) -> int:
      """Number of images."""
      return len(self.image_files)
  
file_path: imagededup/imagededup/utils/data_generator.py
imports: from pathlib import PurePath
  from typing import Dict, Callable, Optional, List, Tuple
  import numpy
  import torch
  from torch.utils.data import Dataset, DataLoader
  from imagededup.utils.image_utils import load_image
  from imagededup.utils.general_utils import generate_files
label_desc: Use image node_id 2 for calling the ImgDataset obj's underlying member method code with example usage: obj.__len__() and returns: len