Hi all,
I'm wondering if anyone knows of a better way to convert a C++ protobuf
into a Python protobuf.
I'm writing a Python module in C++ that wraps some of our protobuf-related
functionality such as reading our logs.
Right now I'm serializing the C++ protobuf and then de-serializing it in
Python.
I'd love to avoid this performance cost.
Here's roughly the code I'm using:
// Python setup code
const char pb_name[] = "foo.Message1";
PyObject* database_module =
PyImport_ImportModule("google.protobuf.symbol_database");
PyObject* database = PyObject_CallMethod(database_module, "Default", nullptr);
PyObject *msg_class = PyObject_CallMethod(database, "GetSymbol", "s", pb_name);
...
PyObject* ConvertToPythonPB(const ::google::protobuf::Message &msg) {
// Serialize into string
auto serialized_msg = msg.SerializeAsString();
// Create a new message instance
PyObject *py_msg = PyObject_CallObject(msg_class, nullptr);
// Deserialize into the Pyhton object
PyObject *result = PyObject_CallMethod(py_msg, "ParseFromString", "y#",
serialized_msg.data(),
serialized_msg.size());
...
return result;
}
I've looked into using the cpp protobuf implementation for Python, but I
haven't had any luck calling that C++ code from my module.
Is there documentation that I'm overlooking? I can't find anything on how
to do this more easily.
Thanks,
Phil
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