code: def _load_data(self):
      self.data_mat = torch.load(self.gen_data_file)
  
imports: import io
  import json
  import os
  import pickle
  from collections import Counter, OrderedDict
  from collections import defaultdict
  import numpy
  import torch
  import torch.nn
  from nltk.tokenize import sent_tokenize, word_tokenize
  from torch.utils.data import Dataset
  from torchvision import transforms, models, datasets
label_desc: Use image node_id 5 for calling the CUBImageFt obj's underlying member method code with example usage: obj._load_data() without return types