add range support in indexing (#56272)

* add range support in indexing

* add getitem ut case

python/paddle/fluid/dygraph/tensor_patch_methods.py

@@ -732,7 +732,7 @@ def monkey_patch_tensor():
             item = (item,)
 
         for slice_item in item:
-            if isinstance(slice_item, (list, np.ndarray, Variable)):
+            if isinstance(slice_item, (list, np.ndarray, Variable, range)):
                 return True
             elif isinstance(slice_item, slice):
                 if (

python/paddle/fluid/variable_index.py

@@ -259,11 +259,13 @@ def replace_ellipsis(var, item):
     return item
 
 
-def replace_ndarray(item):
+def replace_ndarray_and_range(item):
     new_item = []
     for slice_item in item:
         if isinstance(slice_item, np.ndarray):
             new_item.append(paddle.assign(slice_item))
+        elif isinstance(slice_item, range):
+            new_item.append(list(slice_item))
         else:
             new_item.append(slice_item)
     return new_item
@@ -416,7 +418,7 @@ def _setitem_impl_(var, item, value):
     ends = []
     steps = []
 
-    item = replace_ndarray(item)
+    item = replace_ndarray_and_range(item)
     item = replace_ellipsis(var, item)
     item, none_axes = replace_none(item)
     slice_info = SliceInfo()
@@ -700,7 +702,7 @@ def parse_index(x, indices):
     if not isinstance(indices, tuple):
         indices = (indices,)
 
-    indices = replace_ndarray(indices)
+    indices = replace_ndarray_and_range(indices)
     indices = replace_ellipsis(x, indices)
     indices, none_axes = replace_none(indices)
 

test/indexing/test_getitem.py

@@ -129,6 +129,15 @@ class TestGetitemInDygraph(unittest.TestCase):
 
         np.testing.assert_allclose(y.numpy(), np_res)
 
+    def test_index_has_range(self):
+        np_data = np.arange(3 * 4 * 5 * 6).reshape((3, 4, 5, 6))
+        np_res = np_data[:, range(3), 4]
+
+        x = paddle.to_tensor(np_data)
+        y = x[:, range(3), 4]
+
+        np.testing.assert_allclose(y.numpy(), np_res)
+
 
 class TestGetitemInStatic(unittest.TestCase):
     def setUp(self):
@@ -312,6 +321,19 @@ class TestGetitemInStatic(unittest.TestCase):
 
         np.testing.assert_allclose(res[0], np_res)
 
+    def test_index_has_range(self):
+        # only one bool tensor with all False
+        np_data = np.arange(3 * 4 * 5 * 6).reshape((3, 4, 5, 6))
+        np_res = np_data[:, range(3), 4]
+        with paddle.static.program_guard(
+            paddle.static.Program(), paddle.static.Program()
+        ):
+            x = paddle.to_tensor(np_data)
+            y = _getitem_static(x, (slice(None, None, None), range(3), 4))
+            res = self.exe.run(fetch_list=[y.name])
+
+        np.testing.assert_allclose(res[0], np_res)
+
 
 class TestGetItemErrorCase(unittest.TestCase):
     def setUp(self):

test/indexing/test_setitem.py

@@ -51,6 +51,15 @@ class TestSetitemInDygraph(unittest.TestCase):
 
         np.testing.assert_allclose(x.numpy(), np_data)
 
+    def test_index_has_range(self):
+        np_data = np.ones((3, 4, 5, 6), dtype='int32')
+        x = paddle.to_tensor(np_data)
+
+        np_data[:, range(3), [1, 2, 4]] = 10
+        x[:, range(3), [1, 2, 4]] = 10
+
+        np.testing.assert_allclose(x.numpy(), np_data)
+
 
 class TestSetitemInStatic(unittest.TestCase):
     def setUp(self):
@@ -137,3 +146,19 @@ class TestSetitemInStatic(unittest.TestCase):
             res = self.exe.run(fetch_list=[y.name])
 
         np.testing.assert_allclose(res[0], np_data)
+
+    def test_index_has_range(self):
+        np_data = np.ones((3, 4, 5, 6), dtype='int32')
+        np_data[:, range(3), [1, 2, 4]] = 10
+        with paddle.static.program_guard(
+            paddle.static.Program(), paddle.static.Program()
+        ):
+            x = paddle.ones((3, 4, 5, 6), dtype='int32')
+            y = _setitem_static(
+                x,
+                (slice(None, None), range(3), [1, 2, 4]),
+                10,
+            )
+            res = self.exe.run(fetch_list=[y.name])
+
+        np.testing.assert_allclose(res[0], np_data)