Re: [PATCH] tests/functional: fix pylint false positives for cv2 module

Hi

On Mon, Aug 17, 2026 at 11:19 AM Thomas Huth <[email protected]> wrote:
>
> On 15/08/2026 09.24, [email protected] wrote:
> > From: Marc-André Lureau <[email protected]>
> >
> > Add generated-members=cv2.* to pylintrc so pylint skips member
> > checking on the cv2 C extension module, whose members are not
> > visible to static analysis.
> >
> > Silence:
> > 2026-08-15 10:42:08,710 - INFO: qemu-test.test_pylint Checking files in /home/elmarco/src/qemu.qom-qapi/tests/functional/arm with pylint
> > 2026-08-15 10:42:10,941 - ERROR: qemu-test.test_pylint "/home/elmarco/src/qemu.qom-qapi/tests/functional/arm/test_integratorcp.py:83: E1101: Module 'cv2' has no 'imread' member (no-member)"
>
> Alex recently already sent a patch for that error here:
>
>   https://gitlab.com/qemu-project/qemu/-/commit/dd14a21b9dc1
>
> Didn't that help to silence the message in your case, too?

Ah I missed that, but it doesn't help:

pylint --rcfile ../tests/functional/pylintrc ../tests/functional/arm/
************* Module test_integratorcp
/home/elmarco/src/qemu.nohmp/tests/functional/arm/test_integratorcp.py:83:25:
E1101: Module 'cv2' has no 'imread' member (no-member)
/home/elmarco/src/qemu.nohmp/tests/functional/arm/test_integratorcp.py:84:26:
E1101: Module 'cv2' has no 'cvtColor' member (no-member)
/home/elmarco/src/qemu.nohmp/tests/functional/arm/test_integratorcp.py:84:55:
E1101: Module 'cv2' has no 'COLOR_BGR2GRAY' member (no-member)
/home/elmarco/src/qemu.nohmp/tests/functional/arm/test_integratorcp.py:85:17:
E1101: Module 'cv2' has no 'matchTemplate' member (no-member)
/home/elmarco/src/qemu.nohmp/tests/functional/arm/test_integratorcp.py:85:52:
E1101: Module 'cv2' has no 'imread' member (no-member)
/home/elmarco/src/qemu.nohmp/tests/functional/arm/test_integratorcp.py:86:35:
E1101: Module 'cv2' has no 'TM_CCOEFF_NORMED' member (no-member)

My understanding:

I1101 (c-extension-no-member) - disable: silence if pylint can't
introspect the module

E1101 (no-member) - but we need to tell pylint to trust any member
access on cv2 if it can

>
>   Thomas
>
>
>
> > Note: I also tried with extension-pkg-allow-list, but that didn't work
> > for some reason.
> >
> > Signed-off-by: Marc-André Lureau <[email protected]>
> > ---
> >   tests/functional/pylintrc | 6 ++++++
> >   1 file changed, 6 insertions(+)
> >
> > diff --git a/tests/functional/pylintrc b/tests/functional/pylintrc
> > index 949bea611fe4..373aabd6ca3f 100644
> > --- a/tests/functional/pylintrc
> > +++ b/tests/functional/pylintrc
> > @@ -79,6 +79,12 @@ disable=bad-inline-option,
> >           useless-suppression,
> >
> >
> > +[TYPECHECK]
> > +
> > +# cv2 is a C extension module whose members are not visible to pylint
> > +generated-members=cv2.*
> > +
> > +
> >   [SIMILARITIES]
> >
> >   # Minimum lines number of a similarity.
>