code: def diagnostics(self):
      # items_produced is updated only when VentilatedItemProcessedMessage is received. This will happen only on the
      # next call to get_results, so it's value may lag.
      return {
          "items_consumed": self._ventilated_items,
          "items_produced": self._ventilated_items_processed,
          "items_inprocess": self._ventilated_items
          - self._ventilated_items_processed,
          "zmq_copy_buffers": self._zmq_copy_buffers,
      }
  
imports: import logging
  import pickle
  import sys
  import os
  from time import sleep, time
  from traceback import format_exc
  from threading import Thread
  from psutil import pid_exists
  import zmq
  from zmq import ZMQBaseError
  from petastorm.reader_impl.pickle_serializer import PickleSerializer
  from petastorm.workers_pool import EmptyResultError, VentilatedItemProcessedMessage
  from petastorm.workers_pool.exec_in_new_process import exec_in_new_process
label_desc: Use image node_id 9 for calling the ProcessPool obj's underlying member method code with example usage: obj.diagnostics() and returns: dict