code: def __init__(self, stub):
      self.stub = stub
  
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 1 to create a new SimilarityClient object  with example: obj = SimilarityClient(stub)