code: def _get_ipcontroller_pid(profile):
      pid_file = os.path.join(
          _get_ip_file_dir(profile), "..", "pid", "ipcontroller.pid"
      )
      if not os.path.exists(pid_file):
          return None
      with open(pid_file, "r") as f:
          try:
              s = f.read().strip()
              pid = int(s)
          except:
              return None
      return pid
  
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 7 for calling a global function with example usage: _get_ipcontroller_pid(profile) and returns: pid, None, None