mypy fixes

Author: dstansby

.pre-commit-config.yaml

@@ -30,4 +30,4 @@ repos:
       hooks:
       -   id: mypy
           args: [--config-file, pyproject.toml]
-          additional_dependencies: [numpy, pytest, crc32c, zfpy, 'zarr>=3.0.0rc1']
+          additional_dependencies: [numpy, pytest, crc32c, zfpy, 'zarr>=3']

numcodecs/zarr3.py

@@ -286,7 +286,7 @@ def __init__(self, **codec_config: dict[str, JSON]) -> None:
 
     def resolve_metadata(self, chunk_spec: ArraySpec) -> ArraySpec:
         if astype := self.codec_config.get("astype"):
-            return replace(chunk_spec, dtype=np.dtype(astype))  # type: ignore[arg-type]
+            return replace(chunk_spec, dtype=np.dtype(astype))  # type: ignore[call-overload]
         return chunk_spec
 
 
@@ -304,7 +304,7 @@ def __init__(self, **codec_config: JSON) -> None:
 
     def resolve_metadata(self, chunk_spec: ArraySpec) -> ArraySpec:
         if astype := self.codec_config.get("astype"):
-            return replace(chunk_spec, dtype=np.dtype(astype))  # type: ignore[arg-type]
+            return replace(chunk_spec, dtype=np.dtype(astype))  # type: ignore[call-overload]
         return chunk_spec
 
     def evolve_from_array_spec(self, array_spec: ArraySpec) -> FixedScaleOffset: