code: def set_work_threads(self, work_threads):
      self.num_workers = work_threads
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import random
  import numpy
  import torch
  from torch.utils.data import Dataset, DataLoader
label_desc: Use image node_id 4 for calling the PyTorchTrainDataLoader obj's underlying member method code with example usage: obj.set_work_threads(work_threads) without return types