mv import __future to begging of file (#772)

mv import __future to begging of file 

01.fit_a_line/README.cn.md

@@ -123,12 +123,12 @@ $\hat{Y}$ 表示模型的预测结果，用来和真实值$Y$区分。模型要
 ### 配置数据提供器(Datafeeder)
 首先我们引入必要的库：
 ```python
+from __future__ import print_function
 import paddle
 import paddle.fluid as fluid
 import numpy
 import math
 import sys
-from __future__ import print_function
 ```
 
 我们通过uci_housing模块引入了数据集合[UCI Housing Data Set](http://paddlemodels.bj.bcebos.com/uci_housing/housing.data)

01.fit_a_line/README.md

@@ -125,12 +125,12 @@ In a more complex model training process, we often need more than one dataset: t
 First we import the libraries:
 
 ```python
+from __future__ import print_function
 import paddle
 import paddle.fluid as fluid
 import numpy
 import math
 import sys
-from __future__ import print_function
 ```
 
 We introduced the dataset [UCI Housing dataset](http://paddlemodels.bj.bcebos.com/uci_housing/housing.data) via the uci_housing module

01.fit_a_line/index.cn.html

@@ -165,12 +165,12 @@ $\hat{Y}$ 表示模型的预测结果，用来和真实值$Y$区分。模型要
 ### 配置数据提供器(Datafeeder)
 首先我们引入必要的库：
 ```python
+from __future__ import print_function
 import paddle
 import paddle.fluid as fluid
 import numpy
 import math
 import sys
-from __future__ import print_function
 ```
 
 我们通过uci_housing模块引入了数据集合[UCI Housing Data Set](http://paddlemodels.bj.bcebos.com/uci_housing/housing.data)

01.fit_a_line/index.html

@@ -167,12 +167,12 @@ In a more complex model training process, we often need more than one dataset: t
 First we import the libraries:
 
 ```python
+from __future__ import print_function
 import paddle
 import paddle.fluid as fluid
 import numpy
 import math
 import sys
-from __future__ import print_function
 ```
 
 We introduced the dataset [UCI Housing dataset](http://paddlemodels.bj.bcebos.com/uci_housing/housing.data) via the uci_housing module

02.recognize_digits/README.cn.md

@@ -183,13 +183,13 @@ PaddlePaddle在API中提供了自动加载[MNIST](http://yann.lecun.com/exdb/mni
 加载 PaddlePaddle 的 Fluid API 包。
 
 ```python
+from __future__ import print_function # 将python3中的print特性导入当前版本
 import os
 from PIL import Image # 导入图像处理模块
 import matplotlib.pyplot as plt
 import numpy
 import paddle # 导入paddle模块
 import paddle.fluid as fluid
-from __future__ import print_function # 将python3中的print特性导入当前版本
 ```
 
 ### Program Functions 配置

02.recognize_digits/README.md

@@ -162,13 +162,13 @@ In the code examples below, we'll take a closer look at them.
 Load the Fluid API package for PaddlePaddle.
 
 ```python
+from __future__ import print_function #load print of python3 into current version
 import os
 from PIL import Image # load module of image processing
 import matplotlib.pyplot as plt
 import numpy
 import paddle # load paddle module
 import paddle.fluid as fluid
-from __future__ import print_function #load print of python3 into current version
 ```
 
 ### Program Functions Configuration

02.recognize_digits/index.cn.html

@@ -225,13 +225,13 @@ PaddlePaddle在API中提供了自动加载[MNIST](http://yann.lecun.com/exdb/mni
 加载 PaddlePaddle 的 Fluid API 包。
 
 ```python
+from __future__ import print_function # 将python3中的print特性导入当前版本
 import os
 from PIL import Image # 导入图像处理模块
 import matplotlib.pyplot as plt
 import numpy
 import paddle # 导入paddle模块
 import paddle.fluid as fluid
-from __future__ import print_function # 将python3中的print特性导入当前版本
 ```
 
 ### Program Functions 配置

02.recognize_digits/index.html

@@ -204,13 +204,13 @@ In the code examples below, we'll take a closer look at them.
 Load the Fluid API package for PaddlePaddle.
 
 ```python
+from __future__ import print_function #load print of python3 into current version
 import os
 from PIL import Image # load module of image processing
 import matplotlib.pyplot as plt
 import numpy
 import paddle # load paddle module
 import paddle.fluid as fluid
-from __future__ import print_function #load print of python3 into current version
 ```
 
 ### Program Functions Configuration