fix mysterious linting errors

Author: d-v-b

src/zarr/core/_info.py

@@ -69,7 +69,7 @@ def byte_info(size: int) -> str:
 
 
 @dataclasses.dataclass(kw_only=True, frozen=True, slots=True)
-class ArrayInfo:
+class ArrayInfo:  # type: ignore[misc]
     """
     Visual summary for an Array.
 

src/zarr/core/dtype/common.py

@@ -125,7 +125,7 @@ def check_dtype_spec_v2(data: object) -> TypeGuard[DTypeSpec_V2]:
 DTypeSpec_V3 = str | NamedConfig[str, Mapping[str, object]]
 
 
-def check_dtype_spec_v3(data: object) -> TypeGuard[DTypeSpec_V3]:
+def check_dtype_spec_v3(data: object) -> TypeGuard[DTypeSpec_V3]:  # type: ignore[valid-type]
     """
     Type guard for narrowing the type of a python object to an instance of
     DTypeSpec_V3, i.e either a string or a dict with a "name" field that's a string and a
@@ -141,7 +141,7 @@ def check_dtype_spec_v3(data: object) -> TypeGuard[DTypeSpec_V3]:
     return False
 
 
-def unpack_dtype_json(data: DTypeSpec_V2 | DTypeSpec_V3) -> DTypeJSON:
+def unpack_dtype_json(data: DTypeSpec_V2 | DTypeSpec_V3) -> DTypeJSON:  # type: ignore[valid-type]
     """
     Return the array metadata form of the dtype JSON representation. For the Zarr V3 form of dtype
     metadata, this is a no-op. For the Zarr V2 form of dtype metadata, this unpacks the dtype name.

src/zarr/core/dtype/npy/structured.py

@@ -317,7 +317,7 @@ def to_json(self, zarr_format: ZarrFormat) -> StructuredJSON_V2 | StructuredJSON
         elif zarr_format == 3:
             v3_unstable_dtype_warning(self)
             fields = [
-                [f_name, f_dtype.to_json(zarr_format=zarr_format)]  # type: ignore[list-item]
+                [f_name, f_dtype.to_json(zarr_format=zarr_format)]
                 for f_name, f_dtype in self.fields
             ]
             base_dict = {

src/zarr/core/dtype/wrapper.py

@@ -57,7 +57,7 @@
 
 
 @dataclass(frozen=True, kw_only=True, slots=True)
-class ZDType(ABC, Generic[TDType_co, TScalar_co]):
+class ZDType(ABC, Generic[TDType_co, TScalar_co]):  # type: ignore[misc]
     """
     Abstract base class for wrapping native array data types, e.g. numpy dtypes
 
@@ -169,10 +169,10 @@ def from_json(cls: type[Self], data: DTypeJSON, *, zarr_format: ZarrFormat) -> S
     def to_json(self, zarr_format: Literal[2]) -> DTypeSpec_V2: ...
 
     @overload
-    def to_json(self, zarr_format: Literal[3]) -> DTypeSpec_V3: ...
+    def to_json(self, zarr_format: Literal[3]) -> DTypeSpec_V3: ...  # type: ignore[valid-type]
 
     @abstractmethod
-    def to_json(self, zarr_format: ZarrFormat) -> DTypeSpec_V2 | DTypeSpec_V3:
+    def to_json(self, zarr_format: ZarrFormat) -> DTypeSpec_V2 | DTypeSpec_V3:  # type: ignore[valid-type]
         """
         Serialize this ZDType to JSON.
 

tests/test_dtype/test_wrapper.py

@@ -80,7 +80,7 @@ class BaseTestZDType:
     valid_json_v2: ClassVar[tuple[DTypeSpec_V2, ...]] = ()
     invalid_json_v2: ClassVar[tuple[str | dict[str, object] | list[object], ...]] = ()
 
-    valid_json_v3: ClassVar[tuple[DTypeSpec_V3, ...]] = ()
+    valid_json_v3: ClassVar[tuple[DTypeSpec_V3, ...]] = ()  # type: ignore[valid-type]
     invalid_json_v3: ClassVar[tuple[str | dict[str, object], ...]] = ()
 
     # for testing scalar round-trip serialization, we need a tuple of (data type json, scalar json)
@@ -120,9 +120,9 @@ def test_from_json_roundtrip_v2(self, valid_json_v2: DTypeSpec_V2) -> None:
         assert zdtype.to_json(zarr_format=2) == valid_json_v2
 
     @pytest.mark.filterwarnings("ignore::zarr.core.dtype.common.UnstableSpecificationWarning")
-    def test_from_json_roundtrip_v3(self, valid_json_v3: DTypeSpec_V3) -> None:
+    def test_from_json_roundtrip_v3(self, valid_json_v3: DTypeSpec_V3) -> None:  # type: ignore[valid-type]
         zdtype = self.test_cls.from_json(valid_json_v3, zarr_format=3)
-        assert zdtype.to_json(zarr_format=3) == valid_json_v3
+        assert zdtype.to_json(zarr_format=3) == valid_json_v3  # type: ignore[operator]
 
     def test_scalar_roundtrip_v2(self, scalar_v2_params: tuple[ZDType[Any, Any], Any]) -> None:
         zdtype, scalar_json = scalar_v2_params