Failure to import FixtureDef

[oliverdain]

I just upgraded from 0.23.8 to 0.24.0 and my tests are now failing with:

  File ".../venv/lib/python3.10/site-packages/pytest_asyncio/plugin.py", line 35, in <module>
    from pytest import (
ImportError: cannot import name 'FixtureDef' from 'pytest'

This is with pytest 8.3.2. I'm not sure if there's just a but in pytest-asyncio or if it needs to specify that it requires a newer version of pytest.

[ZivotJeKrasny]

I have the same issue with 0.24.0. Downgrading to 0.23.8 helped to "solve" the problem.

[seifertm]

Thanks for the report, I'll look into this!

[seifertm]

Hmm, pytest v8.3.2 explicitly exports the FixtureDef symbol. That means the import statement in pytest-asyncio should be fine. Pytest-asyncio also performs type checking with mypy, which doesn't show any issues.

Do you have any idea what else could break the import? Anything specific to your respective projects?

Is there a chance you can reduce the code to a minimal reproducible example?

[seifertm]

@oliverdain @ZivotJeKrasny Do you happen to have any additional information on this?

[oliverdain]

@oliverdain @ZivotJeKrasny Do you happen to have any additional information on this?

I'm afraid not. When it happened I pinned the version of pytest-asyncio to pytest-asyncio==0.23.8 to avoid the issue and that's about all the debugging I've done.

[webknjaz]

@seifertm the plugin's metadata still sets pytest 8.2 as the minimum version. I can imagine a situation where resolvelib (the dependency resolver in pip install) would backtrack and decide to downgrade the version to an incompatible one, because of some other package in their env, but people would still think it's new. After all, nobody provided any proof of what versions their pip list shows.

[eric-tramel]

Hit this error today on a fresh build off a mamba environment solve.

Have the environment:

$ conda list | grep pytest
pytest                    7.4.4                    pypi_0    pypi
pytest-asyncio            0.24.0             pyhd8ed1ab_0    conda-forge
pytest-cov                5.0.0              pyhd8ed1ab_0    conda-forge
pytest-mock               3.14.0                   pypi_0    pypi

[webknjaz]

@eric-tramel this project does not package things for conda (somebody else, external, does), and you seem to have a mixed environment. If this can't be reproduced with a pip install, I'd suggest asking the downstream packagers for help.

Also, could you post the header of your pytest invocation output (and the command itself)? It contains the versions of Python, pytest, and all the loaded plugins. This is to make sure that it's not loading something else from some other place on your system.