如何在python中动态膨胀protobuf对象？

Question

I'm accessing a web service that provides 1) a protobuf schema and 2) binary data of a given protobuf message. The protobuf schema is retrieved in ZIP format, and contains a .proto file that is defined roughly as:

message FooMessage {
  //stuff
  ... 
}

//other .proto fun... 

Once I've fetched the .proto file, I compile it:

protoc --python_out=. path/to/message

And then I import the module:

module = importlib.import_module(libName, package=pkg)

The next step is to go and fetch the binary data for the given object. I do that and store it as a data = io.BytesIO object.

So now I want to inflate the FooMessage object with my fetched binary data that is defined in the .proto file, ala:

obj = module.FooMessage(data) 

Questions:

1. How can I retrieve the FooMessage class name from the module that I've imported so that I can build the objects dynamically?
2. Even if I "cheat" and look at the compiled code for a single .proto file, I don't see an obvious way to pass in the binary data to inflate the FooMessage_pb2.py object. There doesn't seem to be a method that would take in the binary data to instantiate the object ala: obj = module.FooMessage(data)

Clearly I'm doing / thinking about this in the wrong way. I would greatly appreciate the help.

Answer 1

For #1, they include the class name in the schema. I just missed it.

Well, for #2, I just need to use the module.FooMessage.FromString(data) method which was not immediately obvious in the documentation.