[Fix] Fix unit tests of evaluator (#162)

tests/test_evaluator/test_base_evaluator.py

@@ -79,10 +79,9 @@ def generate_test_results(size, batch_size, pred, label):
     bs_residual = size % batch_size
     for i in range(num_batch):
         bs = bs_residual if i == num_batch - 1 else batch_size
-        data_batch = [(np.zeros(
-            (3, 10, 10)), BaseDataElement(data={'label': label}))
+        data_batch = [(np.zeros((3, 10, 10)), BaseDataElement(label=label))
                       for _ in range(bs)]
-        predictions = [BaseDataElement(data={'pred': pred}) for _ in range(bs)]
+        predictions = [BaseDataElement(pred=pred) for _ in range(bs)]
         yield (data_batch, predictions)