1# Copyright 2023 gRPC authors. 2# 3# Licensed under the Apache License, Version 2.0 (the "License"); 4# you may not use this file except in compliance with the License. 5# You may obtain a copy of the License at 6# 7# http://www.apache.org/licenses/LICENSE-2.0 8# 9# Unless required by applicable law or agreed to in writing, software 10# distributed under the License is distributed on an "AS IS" BASIS, 11# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12# See the License for the specific language governing permissions and 13# limitations under the License. 14"""The Python implementation of the GRPC helloworld.Greeter client.""" 15 16import logging 17 18import grpc 19import helloworld_pb2 20import helloworld_pb2_grpc 21 22 23def run(): 24 print("Will try to greet world ...") 25 options = (("grpc.lb_policy_name", "round_robin"),) 26 # Load balancing takes effect when the DNS server returns multiple IPs for the DNS hostname. 27 # Replace "localhost" with such hostname to see the round robin LB policy take effect. 28 with grpc.insecure_channel("localhost:50051", options=options) as channel: 29 stub = helloworld_pb2_grpc.GreeterStub(channel) 30 response = stub.SayHello(helloworld_pb2.HelloRequest(name="you")) 31 print("Greeter client received: " + response.message) 32 33 34if __name__ == "__main__": 35 logging.basicConfig() 36 run() 37