fixed chunk-shape calculation

apps/hiopy/configure/configure.py

@@ -87,7 +87,7 @@ def add_variable(
         _shard_shape = None
 
         if chunk_shape is not None:
-            _chunk_shape = (np.min(chunk_shape, shape),)
+            _chunk_shape = tuple(min(chunk_shape, shape))
             if chunks_per_shard is not None:
                 _shard_shape = tuple(i * chunks_per_shard for i in _chunk_shape)