Step 1

Create my_data.proto

syntax = "proto3";

message MyData {
  int32 id = 1;
  string name = 2;
  float value = 3;
}

Step 2

protoc --python_out=. my_data.proto

Step 3

poetry add protobuf

Note: Remember protoc --version should be same or closer as protobuf minor version number from pypi library.

In my setup protoc --version = 29.3, pypi protobuf = 5.29.2 Minor version of protobuf is 29.2 which is closer to 29.3

Create Python file my_data_process.py

Step 4

poetry run python my_data_process.py

This creates .bin file