Fix bug when reading scalar datasets

PythonModule/ZarrPy.py

@@ -100,6 +100,14 @@ def readZarr (kvstore_schema, starts, ends, strides):
         'kvstore': kvstore_schema,
     }).result()
 
+    # Convert integer inputs to single-element lists
+    if isinstance(starts, int):
+        starts = [starts]
+    if isinstance(ends, int):
+        ends = [ends]
+    if isinstance(strides, int):
+        strides = [strides]
+
     # Construct the indexing slices
     slices = tuple(slice(start, end, stride) for start, end, stride in zip(starts, ends, strides))
 

test/dataFiles/grp_v2/scalarData/.zarray

@@ -0,0 +1 @@
+{"chunks":[1],"compressor":{"blocksize":0,"clevel":5,"cname":"lz4","id":"blosc","shuffle":1},"dtype":"<f8","fill_value":0,"filters":[],"order":"C","shape":[1],"zarr_format":2}

test/tZarrRead.m

@@ -9,6 +9,7 @@
         ArrPathRead = "dataFiles/grp_v2/arr_v2"
         ArrPathReadSmall = "dataFiles/grp_v2/smallArr"
         ArrPathReadVector = "dataFiles/grp_v2/vectorData"
+        ArrPathReadScalar = "dataFiles/grp_v2/scalarData"
         ArrPathReadV3 = "dataFiles/grp_v3/arr_v3"
 
         ExpData = load(fullfile(pwd,"dataFiles","expZarrArrData.mat"))
@@ -78,6 +79,14 @@ function verifyPartialVectorData(testcase)
                 'Failed to verify using scalar Start, Stride, and Count.');
         end
 
+        function verifyReadScalarData(testcase)
+            zpath = testcase.ArrPathReadScalar; % data is 0
+            expectedData = 0;
+
+            actualData = testcase.verifyWarningFree(@()zarrread(zpath));
+            testcase.verifyEqual(actualData, expectedData)
+        end
+
         function verifyArrayDataRelativePath(testcase)
             % Verify array data if the input is using relative path to the
             % array.
@@ -182,4 +191,4 @@ function invalidPartialReadParams(testcase)
                 @()zarrread(zpath,Start=[3 4],Count=[2 2]),errID)
         end
     end
-end
+end