Print info when server starts (#30964)

examples/python/helloworld/greeter_client.py

@@ -26,6 +26,7 @@ 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.
+    print("Will try to greet world ...")
     with grpc.insecure_channel('localhost:50051') as channel:
         stub = helloworld_pb2_grpc.GreeterStub(channel)
         response = stub.SayHello(helloworld_pb2.HelloRequest(name='you'))

examples/python/helloworld/greeter_server.py

@@ -28,10 +28,12 @@ class Greeter(helloworld_pb2_grpc.GreeterServicer):
 
 
 def serve():
+    port = '50051'
     server = grpc.server(futures.ThreadPoolExecutor(max_workers=10))
     helloworld_pb2_grpc.add_GreeterServicer_to_server(Greeter(), server)
-    server.add_insecure_port('[::]:50051')
+    server.add_insecure_port('[::]:' + port)
     server.start()
+    print("Server started, listening on " + port)
     server.wait_for_termination()