Missing Attribute Error on pytest.fixture

[MisterBianco]

Please provide more information to help us understand the issue:

This is potentially both a bug and a feature request.

@pytest.mark.incremental
@pytest.mark.usefixtures("driver")
class TestNeatLogin(object):
    def test_hello(self) -> None:

        self.driver << Neat().home_page
        assert "hi" in self.driver.url

self.driver is the pytest fixture from a conftest file and is just a wrapper for selenium (unimportant)

Output of mypy --disallow-untyped-defs --ignore-missing-imports test_neat.py:

test_neat.py:18: error: "TestNeatLogin" has no attribute "driver"

I was hoping it would detect the fixture and move on

Environ:

    mypy: 0.660
   python: 3.7

I can try installing from master if anyone feels like that will fix the issue, just curious what I can do to either: fix the issue or ignore these particular errors.

[ilevkivskyi]

There is no way mypy can detect this. Potentially, one can write a mypy plugin (but again mypy core team has no bandwidth for this). Your best choice for now is just to use # type: ignore to silence the error.

[MisterBianco]

Ok thank you, I assume the comment is put at the top of the source file?

[ilevkivskyi]

On the line with error.

[MisterBianco]

Is there a way to ignore all instances of the same error?
Since it generates like 40 errors of the same type?

[ilevkivskyi]

Ignoring part of a file is not implemented yet, see #626. You can however just add ignore_errors = True for that file(s) in mypy.ini (some people do this for tests, because fixtures and mocks cause many false positives).

[JukkaL]

It may also be helpful to explicitly declare the attribute that mypy thinks is missing in the class body.