grpc/examples/python/greeter/client.py

import sys		
import argparse
import grpc

sys.path.insert(0, '../../../../../flatbuffers/python')

import flatbuffers
from models import HelloReply, HelloRequest, greeter_grpc_fb

parser = argparse.ArgumentParser()
parser.add_argument("port", help="server port to connect to", default=3000)
parser.add_argument("name", help="name to be sent to server", default="flatbuffers")

def say_hello(stub, hello_request):
    reply = stub.SayHello(hello_request)
    r = HelloReply.HelloReply.GetRootAs(reply)
    print(r.Message())

def say_many_hellos(stub, hello_request):
    greetings = stub.SayManyHellos(hello_request)
    for greeting in greetings:
        r = HelloReply.HelloReply.GetRootAs(greeting)
        print(r.Message())

def main():
    args = parser.parse_args()

    with grpc.insecure_channel('localhost:' + args.port) as channel:
        builder = flatbuffers.Builder()		
        ind = builder.CreateString(args.name)
        HelloRequest.HelloRequestStart(builder)
        HelloRequest.HelloRequestAddName(builder, ind)
        root = HelloRequest.HelloRequestEnd(builder)
        builder.Finish(root)
        output = bytes(builder.Output())
        stub = greeter_grpc_fb.GreeterStub(channel)
        say_hello(stub, output)
        say_many_hellos(stub, output)

main()