Classes should not inherit from Any

[emmatyping]

Several classes in typeshed inherit from Any, and should not.

$ ag "class .*\(Any\)"
stdlib\3\multiprocessing\context.pyi
118:    class ForkProcess(Any):  # type: ignore
124:    class SpawnProcess(Any):  # type: ignore
130:    class ForkServerProcess(Any):  # type: ignore
148:    class SpawnProcess(Any):  # type: ignore

stdlib\3\types.pyi
81:class SimpleNamespace(Any): ...  # type: ignore

stdlib\3\unittest\mock.pyi
34:    class NonCallableMock(Any):

tests\pytype_blacklist.txt
11:# Because of 'class ForkProcess(Any):  # type: ignore'

third_party\3\jwt\algorithms.pyi
3:class Algorithm(Any): ...  # type: ignore

As can be seen, all but one of these are type-ignore'd and thus not picked up by mypy.

The multiprocessing classes have # TODO: type should be BaseProcess once a stub in multiprocessing.process exists, so that should be okay to change, as that module is there.

The types.pyi SimpleNameSpace needed my __setattr__ implementation.

Apparently the same for NonCallableMock

JWT stubs just seem very incomplete.

[JelleZijlstra]

Feel free to send some PRs. :)

[srittau]

Updated list:

stdlib/3/multiprocessing/context.pyi
134:    class ForkProcess(Any):  # type: ignore
140:    class SpawnProcess(Any):  # type: ignore
146:    class ForkServerProcess(Any):  # type: ignore
164:    class SpawnProcess(Any):  # type: ignore

third_party/3/jwt/algorithms.pyi
3:class Algorithm(Any): ...  # type: ignore

third_party/2and3/google/protobuf/internal/containers.pyi
51:class Mapping(Any): ...

Some are fixed, the protobuf one is new, but is marked explicitly as "not yet typed".

[hauntsaninja]

Looks like it's only the protobuf containers one left. Is it worth adding a test to prevent the addition of Any others?

[srittau]

I think adding a test to flake8-pyi would make sense.

[JelleZijlstra]

It would be better to turn on mypy's --disallow-subclassing-any flag (maybe with a type ignore for the protobuf ones).

[srittau]

Good point.