feat: Update ArrowSeries.from_iterable

Author: dangotbanned

narwhals/_arrow/series.py

@@ -141,13 +141,20 @@ def _from_native_series(
 
     @classmethod
     def from_iterable(
-        cls, data: Iterable[Any], *, context: _FullContext, name: str = ""
+        cls,
+        data: Iterable[Any],
+        *,
+        context: _FullContext,
+        name: str = "",
+        dtype: DType | type[DType] | None = None,
     ) -> Self:
+        version = context._version
+        dtype_pa = narwhals_to_native_dtype(dtype, version) if dtype else None
         return cls(
-            chunked_array([data]),
+            chunked_array([data], dtype_pa),
             name=name,
             backend_version=context._backend_version,
-            version=context._version,
+            version=version,
         )
 
     def _from_scalar(self, value: Any) -> Self:

narwhals/_arrow/utils.py

@@ -74,11 +74,13 @@ def extract_py_scalar(value: Any, /) -> Any:
 
 def chunked_array(
     arr: ArrowArray | list[Iterable[pa.Scalar[Any]]] | ArrowChunkedArray,
+    dtype: pa.DataType | None = None,
+    /,
 ) -> ArrowChunkedArray:
     if isinstance(arr, pa.ChunkedArray):
         return arr
     if isinstance(arr, list):
-        return pa.chunked_array(cast("Any", arr))
+        return pa.chunked_array(cast("Any", arr), dtype)
     else:
         return pa.chunked_array([arr], arr.type)