diff --git a/04.word2vec/README.cn.md b/04.word2vec/README.cn.md
index 47422bcb0c61f840b3010e0eb4e04d67e783e0ae..9baba6a08adbea2df1135970f04bae012393a015 100644
--- a/04.word2vec/README.cn.md
+++ b/04.word2vec/README.cn.md
@@ -250,7 +250,7 @@ def wordemb(inlayer):
 - 定义输入层接受的数据类型以及名字。
 
 ```python
-paddle.init(use_gpu=False, trainer_count=3) # 初始化PaddlePaddle
+paddle.init(use_gpu=False, trainer_count=1) # 初始化PaddlePaddle
 word_dict = paddle.dataset.imikolov.build_dict()
 dict_size = len(word_dict)
 # 每个输入层都接受整形数据，这些数据的范围是[0, dict_size)
diff --git a/04.word2vec/README.md b/04.word2vec/README.md
index 9b405587f4dc05af49d3a1c0c7bbecd16ab6f8b6..33432696154ca7b37a9601670738fe35fd5d01ec 100644
--- a/04.word2vec/README.md
+++ b/04.word2vec/README.md
@@ -266,7 +266,7 @@ def wordemb(inlayer):
 - Define name and type for input to data layer.
 
 ```python
-paddle.init(use_gpu=False, trainer_count=3)
+paddle.init(use_gpu=False, trainer_count=1)
 word_dict = paddle.dataset.imikolov.build_dict()
 dict_size = len(word_dict)
 # Every layer takes integer value of range [0, dict_size)
diff --git a/04.word2vec/train.py b/04.word2vec/train.py
index ab4f67deb81dfa642ee113c9bc79c52e0fa7e54b..187ac821bfb252342025df0b525d1b66acc2ec39 100644
--- a/04.word2vec/train.py
+++ b/04.word2vec/train.py
@@ -41,7 +41,7 @@ def load_dict_and_embedding():
 
 
 def main():
-    paddle.init(use_gpu=with_gpu, trainer_count=3)
+    paddle.init(use_gpu=with_gpu, trainer_count=1)
     word_dict = paddle.dataset.imikolov.build_dict()
     dict_size = len(word_dict)
     # Every layer takes integer value of range [0, dict_size)
diff --git a/06.understand_sentiment/README.cn.md b/06.understand_sentiment/README.cn.md
index 4ae294bc42abd6c6c198c774e53c353f40403d89..3acbb92689dbd8bd1993d8082e65670966ea3f58 100644
--- a/06.understand_sentiment/README.cn.md
+++ b/06.understand_sentiment/README.cn.md
@@ -129,12 +129,9 @@ def convolution_net(input_dim,
     output = paddle.layer.fc(input=[conv_3, conv_4],
                              size=class_dim,
                              act=paddle.activation.Softmax())
-    if not is_predict:
-        lbl = paddle.layer.data("label", paddle.data_type.integer_value(2))
-        cost = paddle.layer.classification_cost(input=output, label=lbl)
-        return cost
-    else:
-        return output
+    lbl = paddle.layer.data("label", paddle.data_type.integer_value(2))
+    cost = paddle.layer.classification_cost(input=output, label=lbl)
+    return cost, output
 ```
 网络的输入`input_dim`表示的是词典的大小，`class_dim`表示类别数。这里，我们使用[`sequence_conv_pool`](https://github.com/PaddlePaddle/Paddle/blob/develop/python/paddle/trainer_config_helpers/networks.py) API实现了卷积和池化操作。
 
@@ -202,12 +199,9 @@ def stacked_lstm_net(input_dim,
                              bias_attr=bias_attr,
                              param_attr=para_attr)
 
-    if not is_predict:
-        lbl = paddle.layer.data("label", paddle.data_type.integer_value(2))
-        cost = paddle.layer.classification_cost(input=output, label=lbl)
-        return cost
-    else:
-        return output
+    lbl = paddle.layer.data("label", paddle.data_type.integer_value(2))
+    cost = paddle.layer.classification_cost(input=output, label=lbl)
+    return cost, output
 ```
 网络的输入`stacked_num`表示的是LSTM的层数，需要是奇数，确保最高层LSTM正向。Paddle里面是通过一个fc和一个lstmemory来实现基于LSTM的循环神经网络。
 
@@ -233,10 +227,10 @@ if __name__ == '__main__':
 ```python
     train_reader = paddle.batch(
         paddle.reader.shuffle(
-            lambda: paddle.dataset.imdb.train(word_dict), buf_size=1000),
+            paddle.dataset.imdb.train(word_dict), buf_size=1000),
         batch_size=100)
     test_reader = paddle.batch(
-        lambda: paddle.dataset.imdb.test(word_dict),
+            paddle.dataset.imdb.test(word_dict),
         batch_size=100)
 ```
 这里，`dataset.imdb.train()`和`dataset.imdb.test()`分别是`dataset.imdb`中的训练数据和测试数据API。`train_reader`在训练时使用，意义是将读取的训练数据进行shuffle后，组成一个batch数据。同理，`test_reader`是在测试的时候使用，将读取的测试数据组成一个batch。
@@ -249,9 +243,10 @@ if __name__ == '__main__':
 
 ```python
     # Please choose the way to build the network
-    # by uncommenting the corresponding line.
-    cost = convolution_net(dict_dim, class_dim=class_dim)
-    # cost = stacked_lstm_net(dict_dim, class_dim=class_dim, stacked_num=3)
+    # option 1
+    [cost, output] = convolution_net(dict_dim, class_dim=class_dim)
+    # option 2
+    # [cost, output] = stacked_lstm_net(dict_dim, class_dim=class_dim, stacked_num=3)
 ```
 该示例中默认使用`convolution_net`网络，如果使用`stacked_lstm_net`网络，注释相应的行即可。其中cost是网络的优化目标，同时cost包含了整个网络的拓扑信息。
 
@@ -350,10 +345,8 @@ Test with Pass 0, {'classification_error_evaluator': 0.11432000249624252}
 
     # 0 stands for positive sample, 1 stands for negative sample
     label = {0:'pos', 1:'neg'}
-    # Use the network used by trainer
-    out = convolution_net(dict_dim, class_dim=class_dim, is_predict=True)
-    # out = stacked_lstm_net(dict_dim, class_dim=class_dim, stacked_num=3, is_predict=True)
-    probs = paddle.infer(output_layer=out, parameters=parameters, input=input)
+  
+    probs = paddle.infer(output_layer=output, parameters=parameters, input=input)
 
     labs = np.argsort(-probs)
     for idx, lab in enumerate(labs):
diff --git a/06.understand_sentiment/README.md b/06.understand_sentiment/README.md
index f682f30f6123df13022e933039ab54c52c2318a6..90c50f64b09302262d20d3ba1b69f9a9aaaf0e21 100644
--- a/06.understand_sentiment/README.md
+++ b/06.understand_sentiment/README.md
@@ -282,11 +282,11 @@ trainer = paddle.trainer.SGD(cost=cost,
 ```python
 train_reader = paddle.batch(
     paddle.reader.shuffle(
-        lambda: paddle.dataset.imdb.train(word_dict), buf_size=1000),
+        paddle.dataset.imdb.train(word_dict), buf_size=1000),
     batch_size=100)
 
 test_reader = paddle.batch(
-    lambda: paddle.dataset.imdb.test(word_dict), batch_size=100)
+        paddle.dataset.imdb.test(word_dict), batch_size=100)
 ```
 
 `feeding` is devoted to specifying the correspondence between each yield record and `paddle.layer.data`. For instance, the first column of data generated by `paddle.dataset.imdb.train()` corresponds to `word` feature.