mypy not ignoring file

[jaraco]

The jaraco.site project has a file in the tree that's ignored for tests.

However, even with that configuration, the file gets collected and is run by mypy and causes tests to fail:

__________________________________________________________________ test session ___________________________________________________________________
mypy exited with status 1.
...
====================================================================== mypy =======================================================================
jaraco/site/projecthoneypot/croakysteel.py:528: error: "Callable[[Any, Any, Any, Any], Any]" has no attribute "getSettings"  [attr-defined]
jaraco/site/projecthoneypot/croakysteel.py:529: error: "Callable[[Any, Any, Any, Any], Any]" has no attribute "makeHTML"  [attr-defined]
jaraco/site/projecthoneypot/croakysteel.py:533: error: "Callable[[Any, Any, Any, Any], Any]" not callable  [operator]
Found 3 errors in 1 file (checked 11 source files)
============================================================= short test summary info =============================================================
FAILED conftest.py::mypy-status
============================================== 1 failed, 25 passed, 10 skipped, 3 warnings in 5.09s ===============================================
py: exit 1 (5.43 seconds) /Users/jaraco/code/jaraco/jaraco.site> pytest pid=33733

Is there a way that pytest-mypy can honor collect_ignore?

[dmtucker]

I think mypy is following this import.

[jaraco]

Oh, right. I hadn't considered that the checking has to be done holistically. Yeah, that makes sense. I did find that I could suppress the errors by configuring the project to ignore types for that module.

I guess it's conceivable that pytest-mypy could translate the collect_ignore setting into mypy excludes, but that's definitely more of a feature request.

[jaraco]

I've found another project affected by this issue: keyrings.alt. This project has a module _win_crypto.py that imports ctypes and accesses attributes of ctypes that are only available on Windows. Thus when checking mypy, it fails its type checks. The module is excluded from tests, but that's insufficient to prevent mypy from failing, even when run under pytest:

keyrings/alt/_win_crypto.py:13: error: Module "ctypes" has no attribute "windll"  [attr-defined]
keyrings/alt/_win_crypto.py:13: error: Module "ctypes" has no attribute "WinDLL"  [attr-defined]
keyrings/alt/_win_crypto.py:13: error: Module "ctypes" has no attribute "WINFUNCTYPE"; maybe "PYFUNCTYPE"?  [attr-defined]
Found 3 errors in 1 file (checked 21 source files)