code: def _wait_client_file_ready(profile, trial=10):
      engine_file = os.path.join(
          _get_ip_file_dir(profile), "ipcontroller-client.json"
      )
      file_ready = False
      for _ in range(trial):
          if not os.path.exists(engine_file):
              time.sleep(0.5)
          else:
              file_ready = True
              break
      if not file_ready:
          raise RuntimeError(
              "Cannot find the ipcontroller-client.json file."
          )
      return engine_file
  
imports: import argparse
  import json
  import os
  import multiprocessing
  import signal
  import subprocess
  import time
  from typing import Dict, List
  import ipyparallel
  import bluefog
  from bluefog.run import env_util, network_util, horovod_driver
label_desc: Use image node_id 6 for calling a global function with example usage: _wait_client_file_ready(profile, trial) and returns: engine_file