examples/python/helloworld/greeter_client_with_options.py

# Copyright 2018 gRPC authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""gRPC Python helloworld.Greeter client with channel options and call timeout parameters."""

from __future__ import print_function
import logging

import grpc

import helloworld_pb2
import helloworld_pb2_grpc


def run():
    # NOTE(gRPC Python Team): .close() is possible on a channel and should be
    # used in circumstances in which the with statement does not fit the needs
    # of the code.
    #
    # For more channel options, please see https://grpc.io/grpc/core/group__grpc__arg__keys.html
    with grpc.insecure_channel(
            target='localhost:50051',
            options=[('grpc.lb_policy_name', 'pick_first'),
                     ('grpc.enable_retries', 0), ('grpc.keepalive_timeout_ms',
                                                  10000)]) as channel:
        stub = helloworld_pb2_grpc.GreeterStub(channel)
        # Timeout in seconds.
        # Please refer gRPC Python documents for more detail. https://grpc.io/grpc/python/grpc.html
        response = stub.SayHello(
            helloworld_pb2.HelloRequest(name='you'), timeout=10)
    print("Greeter client received: " + response.message)


if __name__ == '__main__':
    logging.basicConfig()
    run()