Merge branch 'v3' into generalize-stateful-store

* v3:
  remove outdated v2 source code and tests from v3 branch (zarr-developers#2182)
  Fix/empty listdir (zarr-developers#2225)
  Bump pypa/gh-action-pypi-publish in the actions group (zarr-developers#2219)
  Added Attributes.asdict (zarr-developers#2221)

Author: dcherian

.github/workflows/releases.yml

@@ -55,7 +55,7 @@ jobs:
         with:
           name: releases
           path: dist
-      - uses: pypa/gh-action-pypi-publish@v1.10.1
+      - uses: pypa/gh-action-pypi-publish@v1.10.2
         with:
           user: __token__
           password: ${{ secrets.pypi_password }}

src/zarr/core/array_spec.py

@@ -3,11 +3,11 @@
 from dataclasses import dataclass
 from typing import TYPE_CHECKING, Any, Literal
 
+import numpy as np
+
 from zarr.core.common import parse_fill_value, parse_order, parse_shapelike
 
 if TYPE_CHECKING:
-    import numpy as np
-
     from zarr.core.buffer import BufferPrototype
     from zarr.core.common import ChunkCoords
 
@@ -29,11 +29,12 @@ def __init__(
         prototype: BufferPrototype,
     ) -> None:
         shape_parsed = parse_shapelike(shape)
+        dtype_parsed = np.dtype(dtype)
         fill_value_parsed = parse_fill_value(fill_value)
         order_parsed = parse_order(order)
 
         object.__setattr__(self, "shape", shape_parsed)
-        object.__setattr__(self, "dtype", dtype)
+        object.__setattr__(self, "dtype", dtype_parsed)
         object.__setattr__(self, "fill_value", fill_value_parsed)
         object.__setattr__(self, "order", order_parsed)
         object.__setattr__(self, "prototype", prototype)

src/zarr/core/attributes.py

@@ -51,3 +51,6 @@ def put(self, d: dict[str, JSON]) -> None:
            {'a': 3, 'c': 4}
         """
         self._obj = self._obj.update_attributes(d)
+
+    def asdict(self) -> dict[str, JSON]:
+        return dict(self._obj.metadata.attributes)

src/zarr/store/local.py

@@ -93,11 +93,15 @@ async def clear(self) -> None:
 
     async def empty(self) -> bool:
         try:
-            subpaths = os.listdir(self.root)
+            with os.scandir(self.root) as it:
+                for entry in it:
+                    if entry.is_file():
+                        # stop once a file is found
+                        return False
         except FileNotFoundError:
             return True
         else:
-            return not subpaths
+            return True
 
     def __str__(self) -> str:
         return f"file://{self.root}"