Update pyproject.toml

README.md

@@ -153,14 +153,6 @@ method and `assign_coords`, equivalent to `xr.Dataset` `assign_coords` method.
 Store as an Open Microscopy Environment-Next Generation File Format ([OME-NGFF])
 / [netCDF] [Zarr] store.
 
-It is highly recommended to use `dimension_separator='/'` in the construction of
-the Zarr stores.
-
-```python
-store = zarr.storage.DirectoryStore('multiscale.zarr', dimension_separator='/')
-multiscale.to_zarr(store)
-```
-
 **Note**: The API is under development, and it may change until 1.0.0 is
 released. We mean it :-).
 

multiscale_spatial_image/multiscale_spatial_image.py

@@ -4,13 +4,19 @@
 import numpy as np
 from collections.abc import MutableMapping, Hashable
 from pathlib import Path
-from zarr.storage import BaseStore
+import zarr.storage
 from multiscale_spatial_image.operations import (
     transpose,
     reindex_data_arrays,
     assign_coords,
 )
 
+# Zarr Python 3
+if hasattr(zarr.storage, "StoreLike"):
+    StoreLike = zarr.storage.StoreLike
+else:
+    StoreLike = Union[MutableMapping, str, Path, zarr.storage.BaseStore]
+
 
 @register_datatree_accessor("msi")
 class MultiscaleSpatialImage:
@@ -33,7 +39,7 @@ def __init__(self, xarray_obj: DataTree):
 
     def to_zarr(
         self,
-        store: Union[MutableMapping, str, Path, BaseStore],
+        store: StoreLike,
         mode: str = "w",
         encoding=None,
         **kwargs,
@@ -43,7 +49,7 @@ def to_zarr(
 
         Metadata is added according the OME-NGFF standard.
 
-        store : MutableMapping, str or Path, or zarr.storage.BaseStore
+        store : StoreLike
             Store or path to directory in file system
         mode : {{"w", "w-", "a", "r+", None}, default: "w"
             Persistence mode: “w” means create (overwrite if exists); “w-” means create (fail if exists);