Trying to filter and ignore a caught `ImportError` inside source project which we then emit a `UserWarning` for

[dpanici]

Maybe related to #11483, in my code (like my source code, not inside of any testing files for pytest) I have a section that checks for an optional dependency and throws a warning if it is not installed, something like

import warnings
try:
    import optional
except ImportError:
    warnings.warn("optional dependency is not installed")

this emits a UserWarning, however in my setup.cfg I try to ignore this benign warning but still raise errors on other warnings:

filterwarnings=
    error
    # dont have pytest fail on optional dependency warning
    ignore:optional:UserWarning

but this does not seem to work, and throws an error still like this (this is from my real production code, so does not line up with the MWE above, but a situation exactly like the above is I think what is causing this issue):

ImportError while loading conftest '/home/dpanici/DESC/tests/conftest.py'.
tests/conftest.py:13: in <module>
    from desc.coils import (
desc/coils.py:24: in <module>
    from desc.compute import get_params
desc/compute/__init__.py:30: in <module>
    from . import (
desc/compute/_bootstrap.py:16: in <module>
    from ..integrals.surface_integral import surface_averages_map
desc/integrals/__init__.py:3: in <module>
    from ._bounce_utils import fast_chebyshev, fast_cubic_spline, fourier_chebyshev
desc/integrals/_bounce_utils.py:8: in <module>
    from desc.integrals._interp_utils import (
desc/integrals/_interp_utils.py:19: in <module>
    warnings.warn(
E   UserWarning:
E   jax-finufft is not installed.
E   If you want to use NUFFTs, follow the DESC installation instructions.
E   Otherwise you must set the parameter nufft_eps to zero
E   when computing effective ripple, Gamma_c, and any other
E   computations that involve bounce integrals.

Is there a way for me to have pytest not fail at catching this caught importerror-leading-to-warning? It seems like it is finding the raised ImportError despite it being caught and handled with the try/except block.

Thanks! I am using pytest versions:

pytest                        8.4.1
pytest-benchmark              5.1.0
pytest-cov                    6.2.1
pytest-monitor                1.6.6
pytest-mpl                    0.16.1
pytest-split                  0.10.0
pytest-timeout                2.4.0

on a Linux OS

[RonnyPfannschmidt]

the warning doenst happen in optional, it happens in your package - you need to filter for the correct module

[dpanici]

Sorry if there was confusion, I was using optional as an example.

In my real code I use this:
ignore:jax-finufft is not installed:UserWarning

I don't have the module or line specified because I thought that if not specified, it will just catch the warning if it is thrown at all?

My understanding of the filter warnings syntax is it goes
action:message:category:module:line
but the last two appear optional at least from examples in that same page and also in pytest's own doc section about filterwarnings?

So my understanding is that the filter I have setup should work, yet I get the error in my OP. My understanding could be wrong of course, and I appreciate any help!

If I add additionally the module that the warning occurs in, I still get the same error from pytest