Revert "fix cifar label dimension. test=develop (#33475)"

This reverts commit 6c110344.

python/paddle/tests/test_dataset_cifar.py

@@ -32,8 +32,6 @@ class TestCifar10Train(unittest.TestCase):
         self.assertTrue(data.shape[2] == 3)
         self.assertTrue(data.shape[1] == 32)
         self.assertTrue(data.shape[0] == 32)
-        self.assertTrue(len(label.shape) == 1)
-        self.assertTrue(label.shape[0] == 1)
         self.assertTrue(0 <= int(label) <= 9)
 
 
@@ -51,8 +49,6 @@ class TestCifar10Test(unittest.TestCase):
         self.assertTrue(data.shape[2] == 3)
         self.assertTrue(data.shape[1] == 32)
         self.assertTrue(data.shape[0] == 32)
-        self.assertTrue(len(label.shape) == 1)
-        self.assertTrue(label.shape[0] == 1)
         self.assertTrue(0 <= int(label) <= 9)
 
         # test cv2 backend
@@ -67,8 +63,6 @@ class TestCifar10Test(unittest.TestCase):
         self.assertTrue(data.shape[2] == 3)
         self.assertTrue(data.shape[1] == 32)
         self.assertTrue(data.shape[0] == 32)
-        self.assertTrue(len(label.shape) == 1)
-        self.assertTrue(label.shape[0] == 1)
         self.assertTrue(0 <= int(label) <= 99)
 
         with self.assertRaises(ValueError):
@@ -89,8 +83,6 @@ class TestCifar100Train(unittest.TestCase):
         self.assertTrue(data.shape[2] == 3)
         self.assertTrue(data.shape[1] == 32)
         self.assertTrue(data.shape[0] == 32)
-        self.assertTrue(len(label.shape) == 1)
-        self.assertTrue(label.shape[0] == 1)
         self.assertTrue(0 <= int(label) <= 99)
 
 
@@ -108,8 +100,6 @@ class TestCifar100Test(unittest.TestCase):
         self.assertTrue(data.shape[2] == 3)
         self.assertTrue(data.shape[1] == 32)
         self.assertTrue(data.shape[0] == 32)
-        self.assertTrue(len(label.shape) == 1)
-        self.assertTrue(label.shape[0] == 1)
         self.assertTrue(0 <= int(label) <= 99)
 
         # test cv2 backend
@@ -124,8 +114,6 @@ class TestCifar100Test(unittest.TestCase):
         self.assertTrue(data.shape[2] == 3)
         self.assertTrue(data.shape[1] == 32)
         self.assertTrue(data.shape[0] == 32)
-        self.assertTrue(len(label.shape) == 1)
-        self.assertTrue(label.shape[0] == 1)
         self.assertTrue(0 <= int(label) <= 99)
 
         with self.assertRaises(ValueError):

python/paddle/vision/datasets/cifar.py

@@ -148,8 +148,7 @@ class Cifar10(Dataset):
                     six.b('labels'), batch.get(six.b('fine_labels'), None))
                 assert labels is not None
                 for sample, label in six.moves.zip(data, labels):
-                    self.data.append((sample,
-                                      np.array([label]).astype('int64')))
+                    self.data.append((sample, label))
 
     def __getitem__(self, idx):
         image, label = self.data[idx]
@@ -162,9 +161,9 @@ class Cifar10(Dataset):
             image = self.transform(image)
 
         if self.backend == 'pil':
-            return image, label.astype('int64')
+            return image, np.array(label).astype('int64')
 
-        return image.astype(self.dtype), label.astype('int64')
+        return image.astype(self.dtype), np.array(label).astype('int64')
 
     def __len__(self):
         return len(self.data)