code: def get_pi(self):
      result = None
      while not result:
          with self.lock:
              if not self.result_queue.empty():
                  result = self.result_queue.get(block=False)
          time.sleep(1)
      return result
  
imports: import argparse
  import json
  import logging
  import numpy
  import os
  import threading
  import time
  from ray._private.test_utils import monitor_memory_usage
  from ray.data._internal.progress_bar import ProgressBar
  from collections import namedtuple
  from queue import Queue
  import ray
label_desc: Use image node_id 6 for calling the PiCalculator obj's underlying member method code with example usage: obj.get_pi() and returns: result