grpc python: return value is different from input with large numbers

I was following a tutorial online on using grpc. I ran into a problem when sending large values. For example if I send 5 I get 5. If I send 1,0000 I get 1,0000 back. But if the number is very large for example 9000000000 it returns 8999999488.0 Why is that? How can I fix this so I get the same value back.

Simple function for checking

def IsPrime(number):    return number  

server

  import grpc    from concurrent import futures    import time      import CheckPrime_pb2    import CheckPrime_pb2_grpc      import CheckPrime       class CalculatorServicer(CheckPrime_pb2_grpc.CalculatorServicer):      def CheckPrime(self, request, context):         response = CheckPrime_pb2.Number()         response.value = CheckPrime.IsPrime(request.value)         return response        server = grpc.server(futures.ThreadPoolExecutor(max_workers=10))           CheckPrime_pb2_grpc.add_CalculatorServicer_to_server(CalculatorServicer(), server)     print('Start server, Listening on port 50051.')     server.add_insecure_port('[::]:50051')     server.start()     try:      while True:         time.sleep(86500)    except KeyboardInterrupt:    server.stop(0)   

client

import grpc    import CheckPrime_pb2  import CheckPrime_pb2_grpc      channelname = 'localhost:50051'  channel = grpc.insecure_channel(channelname)    stub = CheckPrime_pb2_grpc.CalculatorStub(channel)    number = CheckPrime_pb2.Number(value= 9000000000)    response = stub.CheckPrime(number)    print(number)  print(response.value)  

https://stackoverflow.com/questions/66846748/grpc-python-return-value-is-different-from-input-with-large-numbers March 29, 2021 at 06:20AM