code: def diagnostics(self):
      return {"output_queue_size": self.results_qsize()}
  
imports: import cProfile
  import pstats
  import random
  import sys
  from threading import Thread, Event
  from traceback import format_exc
  from six.moves import queue
  from petastorm.workers_pool import EmptyResultError, VentilatedItemProcessedMessage
label_desc: Use image node_id 9 for calling the ThreadPool obj's underlying member method code with example usage: obj.diagnostics() and returns: dict