code: def get(self):
      with self._lock:
          start = datetime.datetime.now()
          while not self._batch_queue:
              self._not_empty_cond.wait(_response_time)
              dt = datetime.datetime.now() - start
              if (
                  self.dataset_timeout is not None
                  and dt
                  > datetime.timedelta(seconds=self.dataset_timeout)
              ):
                  _raise_timeout_warning()
          batch, prefetch_state = self._batch_queue.pop(0)
          self._not_full_cond.notify()
          return batch, prefetch_state
  
imports: from __future__ import division
  import datetime
  import multiprocessing
  from multiprocessing import sharedctypes
  import signal
  import sys
  import threading
  import warnings
  import numpy
  import six
  from chainer.dataset import iterator
  from chainer.iterators import _statemachine
  from chainer.iterators.order_samplers import ShuffleOrderSampler
label_desc: Use image node_id 3 for calling the _Communicator obj's underlying member method code with example usage: obj.get() and returns: batch,  prefetch_state