issue_comments: 1464927490

This data as json

html_url issue_url id node_id user created_at updated_at author_association body reactions performed_via_github_app issue
https://github.com/pydata/xarray/pull/7368#issuecomment-1464927490 https://api.github.com/repos/pydata/xarray/issues/7368 1464927490 IC_kwDOAMm_X85XUQUC 43316012 2023-03-11T14:50:02Z 2023-03-11T14:50:24Z COLLABORATOR

DataAlignable = TypeVar("DataAlignable", bound=DataWithCoords | Coordinates) -> doesn't work since we cannot mix DataWithCoords and Coordinates when aligning each object (input type = output type)

I think thats exactly correct. The whold idea of using a TypeVar for the inputs means that all inputs must have the same type.

Consider the following example: ```python class A: ... class B(A): ... class C: ...

T = TypeVar("T", bound=Union[A, C]) def f(*x: T) -> T: ...

f(A(), A()) # OK f(A(), B()) # OK f(C(), C()) # OK f(A(), C()) # not ok, because the common type of A and C is object ``` Also: sorry for the late reply.

 
{
    "total_count": 0,
    "+1": 0,
    "-1": 0,
    "laugh": 0,
    "hooray": 0,
    "confused": 0,
    "heart": 0,
    "rocket": 0,
    "eyes": 0
}
   1485037066