diff --git a/python/paddle/fluid/dygraph/math_op_patch.py b/python/paddle/fluid/dygraph/math_op_patch.py
index fc26715d7cc4e82723ee2ab6b02c68dfc7dc3279..b82434d0588accd967c1929d4380427ce90b17ee 100644
--- a/python/paddle/fluid/dygraph/math_op_patch.py
+++ b/python/paddle/fluid/dygraph/math_op_patch.py
@@ -152,6 +152,12 @@ def monkey_patch_math_tensor():
     def _ndim_(var):
         return len(var.shape)
 
+    def ndimension(var):
+        return len(var.shape)
+
+    def dim(var):
+        return len(var.shape)
+
     @property
     def _size_(var):
         return int(np.prod(var.shape))
@@ -174,8 +180,8 @@ def monkey_patch_math_tensor():
         ('__len__', _len_),
         ('__index__', _index_),
         ('astype', astype),
-        ('dim', lambda x: len(x.shape)),
-        ('ndimension', lambda x: len(x.shape)),
+        ('dim', dim),
+        ('ndimension', ndimension),
         ('ndim', _ndim_),
         ('size', _size_),
         ('T', _T_),
diff --git a/python/paddle/fluid/framework.py b/python/paddle/fluid/framework.py
index a9ba6f91a1e259f89ed12497f313eb5aa6936259..823f790f41030e6156dbd106abfa7471f846e3e0 100644
--- a/python/paddle/fluid/framework.py
+++ b/python/paddle/fluid/framework.py
@@ -1260,6 +1260,7 @@ class Variable(metaclass=VariableMetaClass):
         In Static Graph Mode:
 
         .. code-block:: python
+            :name: code-example-1
 
             import paddle.fluid as fluid
             cur_program = fluid.Program()
@@ -1271,6 +1272,7 @@ class Variable(metaclass=VariableMetaClass):
         In Dygraph  Mode:
 
         .. code-block:: python
+            :name: code-example-2
 
             import paddle.fluid as fluid
             import numpy as np
@@ -5743,21 +5745,22 @@ class Program:
           use :code:`clone` after :code:`Opimizer.minimize`, but we still
           recommend you to use :code:`clone` before using :code:`Opimizer.minimize`.
 
-        For Example:
-          ::
+        Examples:
+            .. code-block:: python
+                :name: code-example-1
 
-            import paddle
-            import paddle.static as static
+                import paddle
+                import paddle.static as static
 
-            paddle.enable_static()
+                paddle.enable_static()
 
-            img = static.data(name='image', shape=[None, 784])
-            pred = static.nn.fc(x=img, size=10, actvation='relu')
-            loss = paddle.mean(pred)
-            # Here we use clone before Momentum
-            test_program = static.default_main_program().clone(for_test=True)
-            optimizer = paddle.optimizer.Momentum(learning_rate=0.01, momentum=0.9)
-            optimizer.minimize(loss)
+                img = static.data(name='image', shape=[None, 784])
+                pred = static.nn.fc(x=img, size=10, actvation='relu')
+                loss = paddle.mean(pred)
+                # Here we use clone before Momentum
+                test_program = static.default_main_program().clone(for_test=True)
+                optimizer = paddle.optimizer.Momentum(learning_rate=0.01, momentum=0.9)
+                optimizer.minimize(loss)
 
         Args:
 
@@ -5778,6 +5781,7 @@ class Program:
                 after :code:`clone`:
 
             .. code-block:: python
+                :name: code-example-2
 
                 import paddle
 
@@ -5795,6 +5799,7 @@ class Program:
 
             1. To clone a test program, the sample code is:
                 .. code-block:: python
+                    :name: code-example-3
 
                     import paddle
                     import paddle.static as static
@@ -5847,6 +5852,7 @@ class Program:
 
             2. The clone method can be avoid if you create program for training and program for testing individually.
                 .. code-block:: python
+                    :name: code-example-4
 
                     import paddle
                     import paddle.static as static
@@ -7235,30 +7241,32 @@ def program_guard(main_program, startup_program=None):
             Default: None.
 
     Examples:
-       .. code-block:: python
+        .. code-block:: python
+            :name: code-example-1
 
-          import paddle
+            import paddle
 
-          paddle.enable_static()
-          main_program = paddle.static.Program()
-          startup_program = paddle.static.Program()
-          with paddle.static.program_guard(main_program, startup_program):
-              data = paddle.static.data(name='image', shape=[None, 784, 784], dtype='float32')
-              hidden = paddle.static.nn.fc(x=data, size=10, activation='relu')
+            paddle.enable_static()
+            main_program = paddle.static.Program()
+            startup_program = paddle.static.Program()
+            with paddle.static.program_guard(main_program, startup_program):
+                data = paddle.static.data(name='image', shape=[None, 784, 784], dtype='float32')
+                hidden = paddle.static.nn.fc(x=data, size=10, activation='relu')
 
     Notes: The temporary :code:`Program` can be used if the user does not need
     to construct either of startup program or main program.
 
     Examples:
-       .. code-block:: python
+        .. code-block:: python
+            :name: code-example-2
 
-          import paddle
+            import paddle
 
-          paddle.enable_static()
-          main_program = paddle.static.Program()
-          # does not care about startup program. Just pass a temporary value.
-          with paddle.static.program_guard(main_program, paddle.static.Program()):
-              data = paddle.static.data(name='image', shape=[None, 784, 784], dtype='float32')
+            paddle.enable_static()
+            main_program = paddle.static.Program()
+            # does not care about startup program. Just pass a temporary value.
+            with paddle.static.program_guard(main_program, paddle.static.Program()):
+                data = paddle.static.data(name='image', shape=[None, 784, 784], dtype='float32')
 
     """
     from .data_feeder import check_type
diff --git a/python/paddle/fluid/layers/math_op_patch.py b/python/paddle/fluid/layers/math_op_patch.py
index 41299a624c12b27a1b36e1e7330d5a554bb784f4..4191b6a8142b7f2f41454cac8c244f743ce17c29 100644
--- a/python/paddle/fluid/layers/math_op_patch.py
+++ b/python/paddle/fluid/layers/math_op_patch.py
@@ -323,6 +323,48 @@ def monkey_patch_variable():
         """
         return len(self.shape)
 
+    def ndimension(self):
+        """
+        Returns the dimension of current Variable
+
+        Returns:
+            the dimension
+
+        Examples:
+            .. code-block:: python
+
+                import paddle
+
+                paddle.enable_static()
+
+                # create a static Variable
+                x = paddle.static.data(name='x', shape=[3, 2, 1])
+                # print the dimension of the Variable
+                print(x.ndimension)
+        """
+        return len(self.shape)
+
+    def dim(self):
+        """
+        Returns the dimension of current Variable
+
+        Returns:
+            the dimension
+
+        Examples:
+            .. code-block:: python
+
+                import paddle
+
+                paddle.enable_static()
+
+                # create a static Variable
+                x = paddle.static.data(name='x', shape=[3, 2, 1])
+                # print the dimension of the Variable
+                print(x.dim)
+        """
+        return len(self.shape)
+
     def _scalar_add_(var, value):
         return _scalar_op_(var, 1.0, value)
 
@@ -509,8 +551,8 @@ def monkey_patch_variable():
         ('append', append),
         ('item', _item),
         ('pop', pop),
-        ('dim', lambda x: len(x.shape)),
-        ('ndimension', lambda x: len(x.shape)),
+        ('dim', dim),
+        ('ndimension', ndimension),
         ('ndim', _ndim_),
         (
             '__add__',
diff --git a/python/paddle/static/nn/control_flow.py b/python/paddle/static/nn/control_flow.py
index 007b417a98b116e9e992b26f4e9d8e0a7366210d..c48128d2c083f92ae668f5d49e7afad2896c1bb7 100644
--- a/python/paddle/static/nn/control_flow.py
+++ b/python/paddle/static/nn/control_flow.py
@@ -896,16 +896,18 @@ def cond(pred, true_fn=None, false_fn=None, name=None, return_names=None):
         3. If it is in static graph mode, any tensors or operations created outside
         or inside of ``true_fn`` and ``false_fn`` will be in net building
         regardless of which branch is selected at runtime. This has frequently
-        surprised users who expected a lazy semantics. For example:
+        surprised users who expected a lazy semantics.
 
-        .. code-block:: python
+        Examples:
+            .. code-block:: python
+                :name: code-example-1
 
-            import paddle
+                import paddle
 
-            a = paddle.zeros((1, 1))
-            b = paddle.zeros((1, 1))
-            c = a * b
-            out = paddle.static.nn.cond(a < b, lambda: a + c, lambda: b * b)
+                a = paddle.zeros((1, 1))
+                b = paddle.zeros((1, 1))
+                c = a * b
+                out = paddle.static.nn.cond(a < b, lambda: a + c, lambda: b * b)
 
         No matter whether ``a < b`` , ``c = a * b`` will be in net building and
         run. ``a + c`` and ``b * b`` will be in net building, but only one
@@ -933,6 +935,7 @@ def cond(pred, true_fn=None, false_fn=None, name=None, return_names=None):
 
     Examples:
         .. code-block:: python
+            :name: code-example-2
 
             import paddle