!20702 Fix NumpySlicesDataset not accept NumPy as data

Merge pull request !20702 from xiaotianci/fix_numpy_slices

mindspore/dataset/engine/validators.py

@@ -1260,7 +1260,7 @@ def check_numpyslicesdataset(method):
 
         data = param_dict.get("data")
         column_names = param_dict.get("column_names")
-        if not data:
+        if data is None or len(data) == 0:  # pylint: disable=len-as-condition
             raise ValueError("Argument data cannot be empty")
         type_check(data, (list, tuple, dict, np.ndarray), "data")
         if isinstance(data, tuple):

tests/ut/python/dataset/test_dataset_numpy_slices.py

@@ -51,6 +51,16 @@ def test_numpy_slices_list_3():
         assert np.equal(data[0].asnumpy(), np_data[i]).all()
 
 
+def test_numpy_slices_numpy():
+    logger.info("Test NumPy structure data.")
+
+    np_data = np.array([[[1, 1], [2, 2]], [[3, 3], [4, 4]]])
+    ds = de.NumpySlicesDataset(np_data, column_names=["col1"], shuffle=False)
+
+    for i, data in enumerate(ds):
+        assert np.equal(data[0].asnumpy(), np_data[i]).all()
+
+
 def test_numpy_slices_list_append():
     logger.info("Test reading data of image list.")