make type hint accurate

pydata · Dec 6, 2024 · 61fe759 · 61fe759
1 parent bec8b42
commit 61fe759
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/xarray/backends/zarr.py b/xarray/backends/zarr.py
@@ -750,7 +750,7 @@ def __init__(
         self._close_store_on_close = close_store_on_close
         self._use_zarr_fill_value_as_mask = use_zarr_fill_value_as_mask
 
-        self._cache: dict[str, tuple[str, ...]] = {}
+        self._cache: dict[str, None | tuple[str, ...]] = {}
         if cache_array_keys:
             self._cache["array_keys"] = None