From a7cf562447e7f7eaf1ab53bf831e4dc294b3bcae Mon Sep 17 00:00:00 2001
From: Zhou Wei <52485244+zhouwei25@users.noreply.github.com>
Date: Mon, 22 Jun 2020 10:32:57 +0800
Subject: [PATCH] fix sample code error of
 fluid.dygraph.NaturalExpDecay,test=develop (#25092)

fix sample code error of fluid.dygraph.NaturalExpDecay
---
 .../fluid/dygraph/learning_rate_scheduler.py  | 20 ++++++++++---------
 1 file changed, 11 insertions(+), 9 deletions(-)

diff --git a/python/paddle/fluid/dygraph/learning_rate_scheduler.py b/python/paddle/fluid/dygraph/learning_rate_scheduler.py
index 9e184d9c5b7..f7ca63d2203 100644
--- a/python/paddle/fluid/dygraph/learning_rate_scheduler.py
+++ b/python/paddle/fluid/dygraph/learning_rate_scheduler.py
@@ -175,15 +175,17 @@ class NaturalExpDecay(LearningRateDecay):
     Examples:
         .. code-block:: python
 
-          import paddle.fluid as fluid
-          base_lr = 0.1
-          with fluid.dygraph.guard():
-              sgd_optimizer = fluid.optimizer.SGD(
-        	      learning_rate=fluid.dygraph.NaturalExpDecay(
-	    	            learning_rate=base_lr,
-        		    decay_steps=10000,
-		            decay_rate=0.5,
-		            staircase=True))
+            import paddle.fluid as fluid
+            base_lr = 0.1
+            with fluid.dygraph.guard():
+                emb = fluid.dygraph.Embedding([10, 10])
+                sgd_optimizer = fluid.optimizer.SGD(
+                        learning_rate=fluid.dygraph.NaturalExpDecay(
+                            learning_rate=base_lr,
+                            decay_steps=10000,
+                            decay_rate=0.5,
+                            staircase=True),
+                        parameter_list=emb.parameters())
 
     """
 
-- 
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