Re: [PATCH v2 1/3] kunit: tool: add subscripts for type annotations where appropriate

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On Mon, May 1, 2023 at 10:15 AM SeongJae Park <sj@xxxxxxxxxx> wrote:
>

[snip]

> >
> > It seems like support for the subscript wasn't added until Python 3.9.
> >
> > I know support for subscripting other types like re.Pattern was added
> > in 3.9 per https://peps.python.org/pep-0585/ but it doesn't mention
> > Popen there...
> > This patch also added typing.IO[str] and concurrent.Future[None], so
> > those might be problematic too.
> >
> > Can you check if the typing.IO and concurrent.Future[None] changes
> > cause problems?
> > (I don't have an easy way of testing against older Python versions currently).
>
> Thank you for quick reply.  Reverting Popen changes only as below fixed my
> issue.  So seems typing.IO and concurrent.Future[None] chages doesn't cause
> problems at least for my use case.

Sounds good.
Sent https://lore.kernel.org/linux-kselftest/20230501181610.2617032-1-dlatypov@xxxxxxxxxx

I was hoping adding `--python-version 3.7` to the `mypy --strict`
invocation would help, but it still fails for me :\

$ ./tools/testing/kunit/run_cheks.py
...
mypy: FAILED
> kunit_kernel.py:95: error: Missing type parameters for generic type "Popen"  [type-arg]
> kunit_kernel.py:116: error: Missing type parameters for generic type "Popen"  [type-arg]
> kunit_kernel.py:145: error: Missing type parameters for generic type "Popen"  [type-arg]
> Found 3 errors in 1 file (checked 8 source files)

And here I was, hoping it would complain about code incompatible with
python 3.7...
But at the very least, that patch should fix the current problem.

Daniel




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