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Re: Strangely rare pytest 7.x bug report

Cross-posted to 2 groups.

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Hi,

I'm a lurker of debian-python@lists.debian.org but seeing Python+Qt I
wanted to have a look. I don't have a solution (I might look more
another time if time permits) but I might have something that might help
someone who knows the tools better.

I am not familiar with Python Debian packaging details/tools neither
with pytest :-( so take all of this with a pinch of salt.

If it helps the error comes from:
/usr/lib/python3.9/importlib/__init__.py in the functin "import_modules"
it does:
"""
    if name.startswith('.'):
        if not package:
            msg = ("the 'package' argument is required to perform a relative "
                   "import for {!r}")
            raise TypeError(msg.format(name))
"""

When the import fails the "name" parameter of "import_modules" function
is: '.pybuild.cpython3_3.9_qtpy.build.qtpy.tests' , which is derived
from the hidden dirctory ".pybuild" as created by default by "pybuild".

I think that the initial "." is used only as a directory name but Python
assumes that is a relative import requiring the package parameter.

Just to check my thoughts, and after running dpkg-buildpackage and
failing let's try again:

$ cd .pybuild/cpython3_3.9_qtpy/build; python3.9 -m pytest qtpy/tests ; cd -
Fails with the:

TypeError: the 'package' argument is required to perform a relative import for '.pybuild.cpython3_3.9_qtpy.build.qtpy.tests'
/home/carles/git/python-qtpy

Then let's try to avoid the initial "." confusion:

$ mv .pybuild pybuild
$ cd pybuild/cpython3_3.9_qtpy/build; python3.9 -m pytest qtpy/tests ; cd -

It works.

I don't know why this is the only package affected by this though...

Hopefully it helps a bit!

On Jul/04/2022, Julian Gilbey wrote:
> Dear all,
> 
> I wonder whether you might have any clue about
> https://bugs.debian.org/1013700
> I have mostly worked out the "cause" of the bug, but I haven't quite
> got to the bottom of it.
> 
> When running the command
> PYTHONPATH=. python3.10 -m pytest qtpy/tests
> in the directory .pybuild/cpython3_3.10_qtpy/build, I get the error
> message:
> 
> ImportError while loading conftest '/home/jdg/debian/spyder-packages/qtpy/build-area/python-qtpy-2.1.0/.pybuild/cpython3_3.10_qtpy/build/qtpy/tests/conftest.py'.
> TypeError: the 'package' argument is required to perform a relative import for '.pybuild.cpython3_3.10_qtpy.build.qtpy.tests'
> 
> If the directory .pybuild is renamed to pybuild, the tests run without
> a problem.  So there seems to be something funny about conftest.py
> (and removing all of the other files from the qtpy/tests directory
> except for the empty __init__.py gives the same error); here's a link
> to it:
> 
> https://salsa.debian.org/python-team/packages/python-qtpy/-/blob/master/qtpy/tests/conftest.py
> 
> But there doesn't seem to be anything out of the ordinary about this.
> So I am mystified: why does pytest 7.x seem to not give this error on
> any other Debian package?
> 
> The only solution I currently have for this package is skip the tests
> at build time and rely on autopkgtest to do them.
> 
> Best wishes,
> 
>    Julian
-- 
Carles Pina i Estany
https://carles.pina.cat

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Thread

Re: Strangely rare pytest 7.x bug report Carles Pina i Estany <carles@pina.cat> - 2022-07-04 17:20 +0200
  Re: Strangely rare pytest 7.x bug report Julian Gilbey <julian@d-and-j.net> - 2022-07-04 20:40 +0200
    Re: Strangely rare pytest 7.x bug report Carles Pina i Estany <carles@pina.cat> - 2022-07-04 21:40 +0200
      Re: Strangely rare pytest 7.x bug report Carles Pina i Estany <carles@pina.cat> - 2022-07-05 09:50 +0200

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