False positive no-name-in-module when importing from from ccxt.base.errors even when using the ignored-modules option

[eabrouwer3]

Bug description

Simply importing exceptions from the ccxt library is giving this error. Here's an example of how we import them:

from ccxt.base.errors import (
    AuthenticationError,
    ExchangeError,
    ExchangeNotAvailable,
    NetworkError,
    RateLimitExceeded,
    RequestTimeout,
)

Pycharm can find the exception classes just fine. I know they exist. It could have something to do with how the library is using __all__, but I don't know too much about how that works to draw that conclusion.

Also, note that we're using version 1.95.1 of ccxt. We use it in some critical paths, so we can't update it to the latest version quite yet.

The configuration written below is what I've tried, but it seems based on googling that that doesn't stop all errors from being ignored regarding those modules. So I'm still getting the issue.

Configuration

# List of module names for which member attributes should not be checked
# (useful for modules/projects where namespaces are manipulated during runtime
# and thus existing member attributes cannot be deduced by static analysis). It
# supports qualified module names, as well as Unix pattern matching.
ignored-modules=ccxt,ccxt.base,ccxt.base.errors

Command used

pylint test_ccxt_base_errors.py

Pylint output

************* Module test_ccxt_base_errors
test_ccxt_base_errors.py:1:0: E0611: No name 'errors' in module 'list' (no-name-in-module)

Expected behavior

No error to be reported

Pylint version

pylint 2.14.5
astroid 2.11.7
Python 3.9.16 (main, Dec  7 2022, 10:16:11)
[Clang 14.0.0 (clang-1400.0.29.202)]

OS / Environment

Intel based 2019 Mac Book Pro. Mac OS 13.1 (Ventura). Fish shell.

Additional dependencies

ccxt==1.95.1

[Pierre-Sassoulas]

Could you upgrade to at least 2.15.10 (better yet 2.16.0b1) and confirm the issue still exists, please ?

[eabrouwer3]

Tried with

pylint 2.15.10
astroid 2.13.4
Python 3.9.16 (main, Dec  7 2022, 10:16:11)
[Clang 14.0.0 (clang-1400.0.29.202)]

and also with pylint 2.16.0b1 and I still get the same issue.

[Pierre-Sassoulas]

Thank you ! I can reproduce, and ignored-modules does work with a simpler example like random.foo

[clavedeluna]

@Pierre-Sassoulas is the fix here:

1. figure out why the ccxt library causes a no-name-in-module msg
2. figure out why using ignored-modules is still raising no-name-in-module
   ?

[Pierre-Sassoulas]

Yes, I think 2/ is the one to prioritize as it's going to be useful for everyone and not just ccxt users. But if we manage find the root cause of 1/ it's going to be generic too.

[clavedeluna]

There is a non-ccxt root cause. This issue can be reproduced with the following dir structure:

pkg_mod_imports/__init__.py
pkg_mod_imports/base/__init__.py
pkg_mod_imports/base/errors.py

pkg_mod_imports/init.py should have :

base = [
    'Exchange',
    'Precise',
    'exchanges',
    'decimal_to_precision',
]

and pkg_mod_imports/base/errors.py

class SomeError(Exception):
    pass

in a test.py module add

from pkg_mod_imports.base.errors import SomeError

And then running pylint test.py the result is

test.py:1:0: E0611: No name 'errors' in module 'list' (no-name-in-module)

It's coming from the fact that errors is both a list inside the init file and the name of a module. variable.py does module = next(module.getattr(name)[0].infer()) . getattr fetches the errors list, not the module!