scripts/runtests.py cannot run tests/mypy_test.py

[Screwtapello]

Steps to reproduce:

1. clone a fresh copy of the repo

    git clone https://github.com/python/typeshed.git
    cd typeshed
   

2. Set up a local development enviroment as described in CONTRIBUTING.md:

    python3 -m venv .venv
    .venv/bin/pip install -U pip
    .venv/bin/pip install -r requirements-tests.txt
   

3. Run the local tests as described in tests/README.md:

    .venv/bin/python3 scripts/runtests.py stdlib/xml
   

Expected results:

• All tests pass or are skipped

Actual results:

mypy tests fail:

Running mypy for Python 3.7...
usage: mypy_test.py [-h] [-x [EXCLUDE ...]] [-v] [-p [{3.12,3.11,3.10,3.9,3.8} ...]]
                    [--platform [{linux,win32,darwin} ...]]
                    [filter ...]
mypy_test.py: error: argument -p/--python-version: invalid choice: '3.7' (choose from '3.12', '3.11', '3.10', '3.9', '3.8')

It looks like #10559 removed "3.7" from the tests/mypy_test.py wrapper, so it would reject requests to test types in Python 3.7 style, but did not update scripts/runtests.py to stop asking for Python 3.7 style.

Adding "3.7" back to the list of acceptable Python versions in tests/mypy_test.py gets things working nicely for me; alternatively, updating scripts/runtests.py to ask for Python 3.8 support works too.

[srittau]

Thanks for the report! Python 3.7 is only semi-supported in typeshed, since mypy dropped support. Even if we only officially drop support for 3.7 in January 2024 (#10113), I will send a PR to use 3.8 in runtests to prevent any potential problems.