Module has no attribute "_USE_C_DESCRIPTORS" error by mypy when trying to import a Protobu-CodePudding

I have created a simple Protobuf object (let's call it file_nam.proto) like the one below:

syntax = "proto3";

package something.somethingelse;

message SomeName {
  string first = 1;
  string second = 2;
  string third = 3;
  string forth = 4;
  uint64 fifth = 5;
  uint64 sixth = 6;
}

which I then successfully compile into .py file using protobuf package. The issue is that when I try to import the .py module in another module, mypy returns the following error when I run the pre-commit command.

interfaces/proto/file_name_pb2.py:28: error: Module has no attribute "_USE_C_DESCRIPTORS"

the error refers to the last line in

# -*- coding: utf-8 -*-
# Generated by the protocol buffer compiler.  DO NOT EDIT!
# source: rasv2_task.proto
"""Generated protocol buffer code."""
from google.protobuf import descriptor as _descriptor
from google.protobuf import descriptor_pool as _descriptor_pool
from google.protobuf import message as _message
from google.protobuf import reflection as _reflection
from google.protobuf import symbol_database as _symbol_database
.
.
.

if _descriptor._USE_C_DESCRIPTORS == False:
    .
    .
    .

but it doesn't make any sense because _descriptor does, in fact, have a _USE_C_DESCRIPTORS attribute.

CodePudding user response：

mypy does not understand the generated code from protobuf -- it does some meta-programmery things that confuse the type checker

but fortunately there's a project to generate .pyi stubs that mypy can understand -- https://github.com/nipunn1313/mypy-protobuf

mypy will prefer the .pyi files to the real .py files and you'll be able to use those types elsewhere