code: def __len__(self):
      return self.data.shape[0]
  
imports: import os
  import pickle
  from PIL import Image
  import h5py
  import json
  from torchmeta.utils.data import Dataset, ClassDataset, CombinationMetaDataset
  from torchmeta.datasets.utils import download_file_from_google_drive
label_desc: Use image node_id 2 for calling the MiniImagenetDataset obj's underlying member method code with example usage: obj.__len__() and returns: self