Feature or enhancement

Proposal:

While not common, capsule objects can appear in APIs. For example the Python DLPack protocol specifies a __dlpack__ method returning a capsule object.

It would therefore be nice to add typing support for capsules. Ideally it should be parameterable by the capsule name, because it often serves as a discriminator for the actual C type under the capsule.

from typing import Capsule, Protocol

class DLPackExportable(Protocol):
    def __dlpack__(self) -> Capsule["dltensor"]:

Has this already been discussed elsewhere?

This is a minor feature, which does not need previous discussion elsewhere

Links to previous discussion of this feature:

No response