code: def __len__(self) -> int:
      return len(self.files)
  
file_path: audio/examples/avsr/lrs3.py
imports: import os
  import torchaudio
  import torchvision
  from torch.utils.data import Dataset
label_desc: Use image node_id 3 for calling the LRS3 obj's underlying member method code with example usage: obj.__len__() and returns: len