Pyright not recognizing metaclass keyword arguments

[StockerMC]

Describe the bug
Pyright doesn't recognize the keyword arguments of a metaclass when passing them in the class definition, though it does for classes with __init_subclass__ defined.

Screenshots or Code

from typing import TypeVar, Tuple, Dict, Any, Type, TYPE_CHECKING

CMT = TypeVar('CMT', bound='CommandMeta')

class BaseCommand:
    if TYPE_CHECKING:
        __foo__: int
        __bar__: str

    def __init_subclass__(cls, *, foo: int, bar: str) -> None: ...

class CommandMeta(type):
    if TYPE_CHECKING:
        __foo__: int
        __bar__: str

    def __new__(
        cls: Type[CMT],
        cls_name: str,
        bases: Tuple[type, ...],
        attrs: Dict[str, Any],
        *,
        foo: int,
        bar: str,
    ) -> CMT: ...


class One(BaseCommand, foo=1): ...  # Argument missing for parameter "bar"
class Two(metaclass=CommandMeta, foo=''): ...  # No error for the incorrect type or the missing parameter

VS Code extension or command-line
Are you running pyright as a VS Code extension or a command-line tool?
Command line (version 1.1.178)

[erictraut]

Yes, you should use __init_subclass__ if you want type checking for metaclass parameters. The behavior is consistent with mypy.

[erictraut]

Looks like this is a known missing feature in mypy. This issue was filed almost five years ago, and it still hasn't been addressed.

I think that metaclasses that take typed keyword parameters are pretty rare, so it's understandable that such a feature would be low priority for a type checker.

For now I'm going to close this request, but we can will reconsider in the future if there is sufficient interest (additional requests or upvotes on this issue).

[Zomatree]

I think this should be added, python uses them in the stdlib¹ and i commonly use them in my code as they can remove boilerplate.

I dont think we should be pinning not adding features due to mypy not supporting them, mypy is notorious for being slow at adding new features and fixing bugs.

[erictraut]

This is included in pyright 1.1.201, which I just published. It will also be included in the next release of pylance.