Module 'google.protobuf.any_pb2' has no 'Any' member

[PhilippSelenium]

Bug description

When running pylint on the following code:

from google.protobuf import any_pb2

isinstance("foo", any_pb2.Any)

Throws a linter warning since protobuf==3.20.0 (It still worked fine with 3.19.4)

Executing the code directly in python yields no error:

from google.protobuf import any_pb2
isinstance("foo", any_pb2.Any)
isinstance(any_pb2.Any(), any_pb2.Any)

Configuration

No response

Command used

pylint test.py

Pylint output

************* Module test
test.py:5:18: E1101: Module 'google.protobuf.any_pb2' has no 'Any' member (no-member)

Expected behavior

No warning.

Pylint version

pylint 2.12.1
astroid 2.9.0
Python 3.8.10 (default, Mar 15 2022, 12:22:08) 
[GCC 9.4.0]

OS / Environment

Ubuntu 20.04

Additional dependencies

protobuf==3.19.4
protobuf==3.20.0

[mbmccoy]

I'm having a similar problem. It's related to this issue: protocolbuffers/protobuf#9730

The issue seems to stem from the fact that 3.20.0 protoc does in fact not directly define the classes that are expected, just a bunch of private variables. The classes are generated at import through python reflection.

However, there are correctly typed stub .pyi files that are generated. For some reason, it seems that pylint (and perhaps mypy) are ignoring generated pyi files.

I'll see if I can get a complete example and post a new issue in the next couple days.

(As an aside, the generated python protobuf code reads as something absolutely insane to python programmers.)

[belm0]

This is pretty bad. A workaround like disabling no-name-in-module globally on my project is not attractive, as it would miss other problems in the code.

[belm0]

pyi stub support appears to be coming soon (merged to Astroid), so it may resolve this

#4987

[Pierre-Sassoulas]

@belm0 would you mind trying out the new astroid using pip install git+https://github.com/pylint-dev/astroid.git@main and reporting back ?

[belm0]

pylint is not happy with astroid head, so I didn't get very far

File "/.../python3.8/site-packages/pylint/checkers/typecheck.py", line 1688, in _check_invalid_sequence_index
    if subscript.ctx is astroid.Store:
AttributeError: module 'astroid' has no attribute 'Store'

[Pierre-Sassoulas]

Thank you for checking. My bad, it's going to be checkable but with pip install git+https://github.com/pylint-dev/pylint.git@main and only when we release a new version of astroid with the latest pyi changes and integrate it in pylint probably in #8685

[mbyrnepr2]

Unfortunately #4987 won't resolve this. #4987 makes it possible to lint .pyi files but it doesn't make it possible to check if a member is defined in a example.pyi file after the member is not found in the example.py file.