pytest 7.1.2 fails over tomli import on Python 3.11.0b1

[gitpushdashf]

python -m pytest --cov=scripts --cov-report=term --cov-fail-under=90 --durations=3
Traceback (most recent call last):
  File "<frozen runpy>", line 198, in _run_module_as_main
  File "<frozen runpy>", line 88, in _run_code
  File "/usr/local/lib/python3.11/site-packages/pytest/__main__.py", line 5, in <module>
    raise SystemExit(pytest.console_main())
                     ^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/_pytest/config/__init__.py", line 187, in console_main
    code = main()
           ^^^^^^
  File "/usr/local/lib/python3.11/site-packages/_pytest/config/__init__.py", line 145, in main
    config = _prepareconfig(args, plugins)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/_pytest/config/__init__.py", line 324, in _prepareconfig
    config = pluginmanager.hook.pytest_cmdline_parse(
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/pluggy/_hooks.py", line 265, in __call__
    return self._hookexec(self.name, self.get_hookimpls(), kwargs, firstresult)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/pluggy/_manager.py", line 80, in _hookexec
    return self._inner_hookexec(hook_name, methods, kwargs, firstresult)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/pluggy/_callers.py", line 55, in _multicall
    gen.send(outcome)
    ^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/_pytest/helpconfig.py", line 102, in pytest_cmdline_parse
    config: Config = outcome.get_result()
                     ^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/pluggy/_result.py", line 60, in get_result
    raise ex[1].with_traceback(ex[2])
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/pluggy/_callers.py", line 39, in _multicall
    res = hook_impl.function(*args)
          ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/_pytest/config/__init__.py", line 1016, in pytest_cmdline_parse
    self.parse(args)
    ^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/_pytest/config/__init__.py", line 1304, in parse
    self._preparse(args, addopts=addopts)
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/_pytest/config/__init__.py", line 1172, in _preparse
    self._initini(args)
    ^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/_pytest/config/__init__.py", line 1091, in _initini
    rootpath, inipath, inicfg = determine_setup(
                                ^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/_pytest/config/findpaths.py", line 186, in determine_setup
    rootdir, inipath, inicfg = locate_config([ancestor])
                               ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/_pytest/config/findpaths.py", line 108, in locate_config
    ini_config = load_config_dict_from_file(p)
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/_pytest/config/findpaths.py", line 67, in load_config_dict_from_file
    import tomli
    ^^^^^^^^^^^^
ModuleNotFoundError: No module named 'tomli'
Unable to run command:
    ``python -m pytest --cov=scripts --cov-report=term --cov-fail-under=90 --durations=3``. 
  Message:
Command 'python -m pytest --cov=scripts --cov-report=term --cov-fail-under=90 --durations=3' returned non-zero exit status 1.

I can try to come up with a minimal test case for this if needed.

[RonnyPfannschmidt]

https://github.com/pytest-dev/pytest/pull/9741/files was supposed to fix that i believe

[RonnyPfannschmidt]

@nicoddemus @bluetech seems like we missed to backport this one, i added the labels, but i probably wont get to it this weekend myself

[RonnyPfannschmidt]

closing - #9983 should resolve this once we merge/release

[RonnyPfannschmidt]

@gitpushdashf thanks for bringing this to attention

[bluetech]

A backport doesn't hurt, although I don't see why it would be needed - tomli should still work on Python 3.11. It looks like @gitpushdashf doesn't have that package installed.

[gitpushdashf]

@gitpushdashf thanks for bringing this to attention

Great, thank you so much!

A backport doesn't hurt, although I don't see why it would be needed - tomli should still work on Python 3.11. It looks like @gitpushdashf doesn't have that package installed.

I installed this in Docker, so it's a clean, standalone environment. I think it has to be some kind of dependency issue. Python 3.11 includes tomllib, preferably used instead of tomli.

[The-Compiler]

I agree this sounds like an issue in your setup, @gitpushdashf, and not pytest.

pytest depends on tomli (unconditionally, with 7.1.2), and evidently that's not installed in your setup.

How are you installing pytest? Can you share the Dockerfile perhaps?

[gitpushdashf]

I agree this sounds like an issue in your setup, @gitpushdashf, and not pytest.

pytest depends on tomli (unconditionally, with 7.1.2), and evidently that's not installed in your setup.

How are you installing pytest? Can you share the Dockerfile perhaps?

I'm starting to think you might be right. It's actually just one project I'm running into this with. Let me do some digging.

[gitpushdashf]

You're right! This is an issue with my virtualenv manager. My bad. Should I close this out?

[nicoddemus]

Yeah, thanks @gitpushdashf!