code: def run(self):
      torch.cuda.set_device(self.local_rank)
      for item in self.generator:
          self.queue.put(item)
      self.queue.put(None)
  
imports: import numbers
  import os
  import queue
  import threading
  import mxnet
  import numpy
  import torch
  from torch.utils.data import DataLoader, Dataset
  from torchvision import transforms
label_desc: Use image node_id 2 for calling the BackgroundGenerator obj's underlying member method code with example usage: obj.run() without return types