fix: respect config when appending to array from zarr.open_array

Author: ianhi

src/zarr/api/asynchronous.py

@@ -1251,13 +1251,24 @@ async def open_array(
 
     zarr_format = _handle_zarr_version_or_format(zarr_version=zarr_version, zarr_format=zarr_format)
 
+    config: ArrayConfigParams = kwargs.get("config", {})
     if "order" in kwargs:
         _warn_order_kwarg()
     if "write_empty_chunks" in kwargs:
-        _warn_write_empty_chunks_kwarg()
+        if len(config) != 0:
+            msg = (
+                "Both write_empty_chunks and config keyword arguments are set. "
+                "This is redundant. When both are set, write_empty_chunks will be ignored and "
+                "config will be used."
+            )
+            warnings.warn(UserWarning(msg), stacklevel=1)
+        else:
+            _warn_write_empty_chunks_kwarg()
+            # don't pop as this is only used for AsyncArray.open
+            config["write_empty_chunks"] = kwargs["write_empty_chunks"]
 
     try:
-        return await AsyncArray.open(store_path, zarr_format=zarr_format)
+        return await AsyncArray.open(store_path, zarr_format=zarr_format, config=config)
     except FileNotFoundError:
         if not store_path.read_only and mode in _CREATE_MODES:
             overwrite = _infer_overwrite(mode)

src/zarr/core/array.py

@@ -869,6 +869,7 @@ async def open(
         cls,
         store: StoreLike,
         zarr_format: ZarrFormat | None = 3,
+        config: ArrayConfigLike | None = None,
     ) -> AsyncArray[ArrayV3Metadata] | AsyncArray[ArrayV2Metadata]:
         """
         Async method to open an existing Zarr array from a given store.
@@ -879,6 +880,8 @@ async def open(
             The store containing the Zarr array.
         zarr_format : ZarrFormat | None, optional
             The Zarr format version (default is 3).
+        config : ArrayConfigLike, optional
+            Runtime configuration for the array.
 
         Returns
         -------
@@ -896,7 +899,7 @@ async def open(
         metadata_dict = await get_array_metadata(store_path, zarr_format=zarr_format)
         # TODO: remove this cast when we have better type hints
         _metadata_dict = cast(ArrayV3MetadataDict, metadata_dict)
-        return cls(store_path=store_path, metadata=_metadata_dict)
+        return cls(store_path=store_path, metadata=_metadata_dict, config=config)
 
     @property
     def store(self) -> Store: