code: def _start_driver(self, num_cores, redis_address):
      print("Start to launch ray driver on local")
      import ray._private.services
  
      node_ip = ray._private.services.get_node_ip_address(redis_address)
      self._start_restricted_worker(
          num_cores=num_cores,
          node_ip_address=node_ip,
          redis_address=redis_address,
      )
      ray.shutdown()
      init_params = dict(
          address=redis_address, _node_ip_address=node_ip
      )
      if self.redis_password:
          init_params["_redis_password"] = self.redis_password
      if version.parse(ray.__version__) >= version.parse("1.4.0"):
          init_params["namespace"] = "az"
      return ray.init(**init_params)
  
imports: import os
  import re
  import subprocess
  import time
  import uuid
  import random
  import warnings
  import tempfile
  import filelock
  import multiprocessing
  from packaging import version
  from zoo.ray.process import session_execute, ProcessMonitor
  from zoo.ray.utils import is_local
  from zoo.ray.utils import resource_to_bytes
  from zoo.ray.utils import get_parent_pid
label_desc: Use image node_id 13 for calling the RayContext obj's underlying member method code with example usage: obj._start_driver(num_cores, redis_address) and returns: ray