code: def address_info(self):
      if self._address_info:
          return self._address_info
      else:
          raise Exception(
              "The Ray cluster has not been launched yet. Please call init first"
          )
  
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 9 for calling the RayContext obj's underlying member method code with example usage: obj.address_info() and returns: self