text: import grpc
  
  import square_pb2
  import square_pb2_grpc
  
  
  # open a gRPC channel
  channel = grpc.insecure_channel("localhost:50051")
  
  # create a stub (client)
  stub = square_pb2_grpc.SquareStub(channel)
  
  # create a valid request message
  number = square_pb2.Number(value=16)
  
  # make the call
  response = stub.SquareRoot(number)
  print(response)
  
  