CODEWITHSUNDEEP
pythonprotocol-buffers
alwaysday1
alwaysday1

Reputation: 1783

object has no attribute 'add' on python's protobuf

I want to test the nested message on protobuf's API on python.

My proto ndemo.proto file was:

package ndemotest;

message BaseRequest
{
    required bytes Key = 1;
}

message ContRequest
{
    required BaseRequest baseRequest = 1;
    optional string Url = 2;
}

My python ndemo.py code was:

import binascii
import ndemo_pb2


contReq = ndemo_pb2.ContRequest()
contReq.Url="www.google.com"

base_request = contReq.baseRequest.add()
base_request.Key="12345"


packed_data = contReq.SerializeToString()

print 'sending "%s"' % binascii.hexlify(packed_data)

When I ran my script as python ndemo.py, there was an error

Traceback (most recent call last): File "ndemo.py", line 8, in base_request = contReq.baseRequest.add() AttributeError: 'BaseRequest' object has no attribute 'add'

Upvotes: 2

Views: 7729

Answers (1)

Thomas Lee
Thomas Lee

Reputation: 1372

You only have add() for a repeated field, that's the point of it.

In your case, as baseRequest is required, you should simply assign the value directly to the field within BaseRequest, like:

contReq = ndemo_pb2.ContRequest()
contReq.baseRequest.key = "12345"

Upvotes: 6

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