python protobuf assign a dictionary to any fields of google proto

Question

I have a.prot file which consists of below fields user.proto

message Integration {
 string db_name = 1;
 oneof payload {
        Asset asset = 2;
        }
     }
message Asset {
 string address = 1;
 google.protobuf.Any extra_fields = 2;
 }

I just want to assign a large dictionary to extra_fields like below

importing the generated pb2 file

import user_pb2
i = user_pb2.Integration()
i.db_name = "sdsdsd"
i.asset.address = "sdsd"
i.asset.extra_fields = {"assd":"sdsd","sd":"asd"...}

but it is raising the

AttributeError: Assignment not allowed to field "extra_fields" in the protocol message object.

I don't want to specify the filed names in proto because my dict contains over 100 fields I just want to assign total dict to extra fields can anyone suggest how to insert dict to extra fields?

Answer 1

You just need to skip .asset and assign i.address or i.extra_fields directly. For example:

i.extra_fields = {"a": "b"}

see the documentation: https://developers.google.com/protocol-buffers/docs/reference/python-generated#oneof

Answer 2

Finally, we figured out how to add the dict to protobuf directly, using struct keyword in google protobuf

message Integration {
 string db_name = 1;
 oneof payload {
        Asset asset = 2;
        }
     }
message Asset {
 string address = 1;
google.protobuf.Struct extra_fields = 2;

 }

instead of any we used struct in the assigning, we can do directly update the dict

import user_pb2
i = user_pb2.Integration()
i.db_name = "sdsdsd"
i.asset.address = "sdsd"
i.asset.extra_fields.update({"assd":"sdsd","sd":"asd"})