typing issue with __version_info__ += __parsed_version__.pre

mypy issue:

    __version_info__ += __parsed_version__.pre

src/webargs/__init__.py:14: error: Unsupported operand types for + ("Tuple[int, ...]" and "Tuple[str, int]")

Not sure what the problem is. I’m tempted to just add a # type: ignore. Any better idea, anyone?

[lafrech]

~Perhaps we could pin mypy to 0.910 in the meantime to avoid CI errors on unrelated PRs.~

Edit: In fact it is still pinned to 0.910 in dev branch as we haven’t merged #670 yet. I had it bumped to 0.930 through pre-commit autoupdate while working on #673. I just downgraded it in that branch to let tests pass.

Edit 2: It is pinned in pre-commit config but not in tox in the dedicated mypy target. I sent #674 to pin it there too.

[sirosen]

As detailed in the marshmallow PR, I had mixed up the semantics of + on tuples. (I thought it was vector addition, not concatenation.) So the code is correct, but we need to either annotate the version_info tuple as tuple[str | int, ...] or as tuple[int, int, int] | tuple[int, int, int, str, int]. I’ll continue to use the marshmallow PR to drive this, and we can just follow the decision we reach there.