fix type checking errors

Author: d-v-b

src/zarr/codecs/arrow.py

@@ -32,7 +32,7 @@ def from_dict(cls, data: dict[str, JSON]) -> Self:
             data, "arrow-ipc", require_configuration=False
         )
         configuration_parsed = configuration_parsed or {}
-        return cls(**configuration_parsed)
+        return cls(**configuration_parsed)  # type: ignore[arg-type]
 
     def to_dict(self) -> dict[str, JSON]:
         return {"name": "arrow_ipc", "configuration": {"column_name": self.column_name}}

src/zarr/core/metadata/v3.py

@@ -105,10 +105,10 @@ def validate_codecs(codecs: tuple[Codec, ...], dtype: ZDType[TBaseDType, TBaseSc
     # TODO: use codec ID instead of class name
     codec_class_name = abc.__class__.__name__
     # TODO: Fix typing here
-    if isinstance(dtype, VariableLengthUTF8) and codec_class_name not in (
+    if isinstance(dtype, VariableLengthUTF8) and codec_class_name not in (  # type: ignore[unreachable]
         "VLenUTF8Codec",
         "ArrowIPCCodec",
-    ):  # type: ignore[unreachable]
+    ):
         raise ValueError(
             f"For string dtype, ArrayBytesCodec must be `VLenUTF8Codec`, got `{codec_class_name}`."
         )

tests/test_codecs/test_arrow.py

@@ -1,4 +1,5 @@
 import io
+from typing import Any
 
 import numpy as np
 import pytest
@@ -28,7 +29,9 @@
 
 
 @pytest.mark.parametrize("numpy_array_and_zdtype", numpy_array_fixtures)
-async def test_arrow_codec_round_trip(numpy_array_and_zdtype) -> None:
+async def test_arrow_codec_round_trip(
+    numpy_array_and_zdtype: tuple[np.ndarray[Any, Any], zarr.dtype.ZDType[Any, Any] | None],
+) -> None:
     numpy_array, zdtype = numpy_array_and_zdtype
     if zdtype is None:
         spec_dtype = parse_dtype(numpy_array.dtype, zarr_format=3)
@@ -88,8 +91,8 @@ def test_string_array() -> None:
 
     a = zarr.create_array(
         shape=4,
-        chunks=2,
-        dtype=zarr.dtype.VariableLengthUTF8(),
+        chunks=(2,),
+        dtype=zarr.dtype.VariableLengthUTF8(),  # type: ignore[arg-type]
         serializer=ArrowIPCCodec(),
         store=zarr.storage.MemoryStore(),
     )