array name is not nullable

Author: d-v-b

src/zarr/core/array.py

@@ -810,34 +810,30 @@ def path(self) -> str:
         return self.store_path.path
 
     @property
-    def name(self) -> str | None:
+    def name(self) -> str:
         """Array name following h5py convention.
 
         Returns
         -------
         str
             The name of the array.
         """
-        if self.path:
-            # follow h5py convention: add leading slash
-            name = self.path
-            if name[0] != "/":
-                name = "/" + name
-            return name
-        return None
+        # follow h5py convention: add leading slash
+        name = self.path
+        if not name.startswith("/"):
+            name = "/" + name
+        return name
 
     @property
-    def basename(self) -> str | None:
+    def basename(self) -> str:
         """Final component of name.
 
         Returns
         -------
         str
             The basename or final component of the array name.
         """
-        if self.name is not None:
-            return self.name.split("/")[-1]
-        return None
+        return self.name.split("/")[-1]
 
     @property
     def cdata_shape(self) -> ChunkCoords:
@@ -1626,8 +1622,7 @@ def path(self) -> str:
         return self._async_array.path
 
     @property
-    def name(self) -> str | None:
-        """Array name following h5py convention."""
+    def name(self) -> str:
         return self._async_array.name
 
     @property