code: def __len__(self) -> int:
      return len(self.data)
  
file_path: wandb/tests/functional_tests/t0_main/torch/t2_mp_simple.py
imports: import os
  import torch
  import torch.multiprocessing
  import torch.nn
  import torch.nn.functional
  import torch.optim
  import wandb
  from PIL import Image
  from torchvision import transforms
label_desc: Use image node_id 3 for calling the MyDatatse obj's underlying member method code with example usage: obj.__len__() and returns: len