From 54e491ac4110b937242697846d6933d5b7c5e48e Mon Sep 17 00:00:00 2001
From: danleifeng <danleifeng@163.com>
Date: Sun, 27 Sep 2020 06:31:05 +0000
Subject: [PATCH] fix code example for is_empty; test=develop

---
 .../api/paddle/fluid/layers/is_empty_cn.rst   | 37 +++++++++++++++----
 1 file changed, 29 insertions(+), 8 deletions(-)

diff --git a/doc/paddle/api/paddle/fluid/layers/is_empty_cn.rst b/doc/paddle/api/paddle/fluid/layers/is_empty_cn.rst
index d0e21720f..c45ac1a1f 100644
--- a/doc/paddle/api/paddle/fluid/layers/is_empty_cn.rst
+++ b/doc/paddle/api/paddle/fluid/layers/is_empty_cn.rst
@@ -3,7 +3,7 @@
 is_empty
 -------------------------------
 
-.. py:function:: paddle.fluid.layers.is_empty(x, cond=None)
+.. py:function:: paddle.is_empty(x, name=None)
 
 
 
@@ -12,24 +12,45 @@ is_empty
 
 参数：
     - **x** (Variable)-测试的变量
-    - **cond** (Variable|None)-可选输出参数，默认为空（None）。若传入了该参数，则该参数中存储返回给定x的测试结果
+   - **name** （str，可选）- 输出的名字。默认值为None。该参数供开发人员打印调试信息时使用，具体用法请参见 :ref:`api_guide_Name` 。
 
 返回：布尔类型的标量。如果变量x为空则值为真
 
 返回类型：Variable
 
-抛出异常：``TypeError``-如果input类型不是Variable或cond存储的返回结果的类型不是bool
 
 **代码示例**：
 
 .. code-block:: python
 
-    import paddle.fluid as fluid
-    input = fluid.layers.data(name="input", shape=[4, 32, 32], dtype="float32")
-    res = fluid.layers.is_empty(x=input)
-    # or:
-    # fluid.layers.is_empty(x=input, cond=res)
+    # static mode
+    import numpy as np
+    import paddle
 
+    paddle.enable_static()
+    input = paddle.static.data(name="input", shape=[4, 32, 32], dtype="float32")
+    res = paddle.is_empty(x=input)
 
+    exe = paddle.static.Executor(paddle.CPUPlace())
+    data = np.ones((4, 32, 32)).astype(np.float32)
+    out = exe.run(feed={'input':data}, fetch_list=[res])
+    print("is_empty: ", out)
+    # ('out:', [array([False])])
+
+
+.. code-block:: python
+
+    # dygraph_mode
+    import paddle
+
+    input = paddle.rand(shape=[4, 32, 32], dtype='float32')
+    res = paddle.is_empty(x=input)
+    print("res:", res)
+    # ('res:', Tensor: eager_tmp_1
+    #    - place: CPUPlace
+    #    - shape: [1]
+    #    - layout: NCHW
+    #    - dtype: bool
+    #    - data: [0])
 
 
-- 
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