code: def search(self, id, k):
      request = recall_pb2.Query(userID=id, k=k)
      try:
          candidates = self.stub.searchCandidates(request)
          return candidates.candidate
      except Exception as e:
          logging.warning("RPC failed:{}".format(e))
          return
  
imports: import logging
  import grpc
  from friesian.example.serving.generated import recall_pb2_grpc, recall_pb2
  import os
  import pandas
  import argparse
  import time
  import threading
  from urllib.parse import urlparse
  from os.path import exists
  from bigdl.dllib.utils import log4Error
label_desc: Use image node_id 2 for calling the SimilarityClient obj's underlying member method code with example usage: obj.search(id, k) and returns: candidates