code: def ip(self):
      return ray._private.services.get_node_ip_address()
  
imports: import ray
  from bigdl.dllib.nncontext import init_spark_on_yarn
  from bigdl.orca.ray import OrcaRayContext
label_desc: Use image node_id 3 for calling the TestRay obj's underlying member method code with example usage: obj.ip() and returns: ray