code: def get_driver_ip(nics):
      """
      :param nics: object return by `_driver_fn`
      :return: driver ip. We make sure all workers can connect to this ip.
      """
      iface = list(nics)[0]
      driver_ip = None
      for addr in net_if_addrs()[iface]:
          if addr.family == AF_INET:
              driver_ip = addr.address
  
      if not driver_ip:
          raise RuntimeError(
              "Cannot find an IPv4 address of the common interface."
          )
  
      return driver_ip
  
file_path: horovod/horovod/runner/util/network.py
imports: import psutil
  import random
  import socket
  from socket import AF_INET
  from psutil import net_if_addrs
  from horovod.common.util import _cache
  from horovod.runner.util import threads
label_desc: Use image node_id 6 for calling a global function with example usage: get_driver_ip(nics) and returns: driver_ip