rev

zarr/storage.py

@@ -517,7 +517,7 @@ def _dict_store_keys(d: Dict, prefix="", cls=dict):
             yield prefix + k
 
 
-class Store(MutableMapping):
+class Store:
     """Base class for stores implementation.
 
 
@@ -558,6 +558,16 @@ def close(self) -> None:
         pass
 
 
+class KVStore(Store):
+    """
+    This provide an default implementation of a store interface around
+    a mutable mapping, to avoid havign to test stores for presence of methods
+    """
+
+    def __init__(self):
+        pass
+
+
 class MemoryStore(Store):
     """Store class that uses a hierarchy of :class:`dict` objects, thus all data
     will be held in main memory.

zarr/tests/test_hierarchy.py

@@ -49,7 +49,7 @@ class TestGroup(unittest.TestCase):
     @staticmethod
     def create_store():
         # can be overridden in sub-classes
-        return MemoryStore(), None
+        return dict(), None
 
     def create_group(self, store=None, path=None, read_only=False,
                      chunk_store=None, synchronizer=None):