Add print_function for all python files

python/paddle/dataset/cifar.py

@@ -28,6 +28,8 @@ images per class.
 
 """
 
+from __future__ import print_function
+
 import itertools
 import numpy
 import paddle.dataset.common

python/paddle/dataset/common.py

@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import print_function
+
 import requests
 import hashlib
 import os

python/paddle/dataset/conll05.py

@@ -20,6 +20,8 @@ dataset. And a pre-trained word vector model based on Wikipedia corpus is used
 to initialize SRL model.
 """
 
+from __future__ import print_function
+
 import tarfile
 import gzip
 import itertools

python/paddle/dataset/flowers.py

@@ -28,6 +28,9 @@ Graphics and Image Processing (2008)
 http://www.robots.ox.ac.uk/~vgg/publications/papers/nilsback08.{pdf,ps.gz}.
 
 """
+
+from __future__ import print_function
+
 import itertools
 import functools
 from .common import download

python/paddle/dataset/image.py

@@ -29,6 +29,9 @@ the image layout as follows.
   formats can be used for training. Noted that, the format should
   be keep consistent between the training and inference peroid.
 """
+
+from __future__ import print_function
+
 import numpy as np
 try:
     import cv2

python/paddle/dataset/imdb.py

@@ -20,6 +20,8 @@ of 25,000 highly polar movie reviews for training, and 25,000 for testing.
 Besides, this module also provides API for building dictionary.
 """
 
+from __future__ import print_function
+
 import paddle.dataset.common
 import collections
 import tarfile

python/paddle/dataset/imikolov.py

@@ -18,6 +18,9 @@ This module will download dataset from
 http://www.fit.vutbr.cz/~imikolov/rnnlm/ and parse training set and test set
 into paddle reader creators.
 """
+
+from __future__ import print_function
+
 import paddle.dataset.common
 import collections
 import tarfile

python/paddle/dataset/mnist.py

@@ -17,6 +17,9 @@ MNIST dataset.
 This module will download dataset from http://yann.lecun.com/exdb/mnist/ and
 parse training set and test set into paddle reader creators.
 """
+
+from __future__ import print_function
+
 import paddle.dataset.common
 import subprocess
 import numpy

python/paddle/dataset/movielens.py

@@ -22,6 +22,8 @@ set and test set into paddle reader creators.
 
 """
 
+from __future__ import print_function
+
 import zipfile
 import paddle.dataset.common
 import re

python/paddle/dataset/mq2007.py

@@ -23,6 +23,8 @@ http://research.microsoft.com/en-us/um/beijing/projects/letor/LETOR4.0/Data/MQ20
 
 """
 
+from __future__ import print_function
+
 import os
 import functools
 import rarfile

python/paddle/dataset/sentiment.py

@@ -20,6 +20,8 @@ The script fetch and preprocess movie_reviews data set that provided by NLTK
 TODO(yuyang18): Complete dataset.
 """
 
+from __future__ import print_function
+
 import six
 import collections
 from itertools import chain

python/paddle/dataset/tests/cifar_test.py

@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import print_function
+
 import paddle.dataset.cifar
 import unittest
 

python/paddle/dataset/tests/common_test.py

@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import print_function
+
 import paddle.dataset.common
 import unittest
 import tempfile

python/paddle/dataset/tests/flowers_test.py

@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import print_function
+
 import paddle.dataset.flowers
 import unittest
 

python/paddle/dataset/tests/imdb_test.py

@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import print_function
+
 import paddle.dataset.imdb
 import unittest
 import re

python/paddle/dataset/tests/imikolov_test.py

@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import print_function
+
 import paddle.dataset.imikolov
 import unittest
 

python/paddle/dataset/tests/mnist_test.py

@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import print_function
+
 import paddle.dataset.mnist
 import unittest
 

python/paddle/dataset/tests/mq2007_test.py

@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import print_function
+
 import paddle.dataset.mq2007
 import unittest
 

python/paddle/dataset/tests/test_image.py

@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import print_function
+
 import unittest
 import numpy as np
 

python/paddle/dataset/tests/test_sentiment.py

@@ -15,6 +15,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import print_function
+
 import unittest
 import nltk
 import paddle.dataset.sentiment as st

python/paddle/dataset/tests/voc2012_test.py

@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import print_function
+
 import paddle.dataset.voc2012
 import unittest
 

python/paddle/dataset/tests/wmt16_test.py

@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import print_function
+
 import paddle.dataset.wmt16
 import unittest
 

python/paddle/dataset/uci_housing.py

@@ -19,7 +19,7 @@ https://archive.ics.uci.edu/ml/machine-learning-databases/housing/ and
 parse training set and test set into paddle reader creators.
 """
 
-import os
+from __future__ import print_function
 
 import numpy as np
 import six

python/paddle/dataset/voc2012.py

@@ -19,6 +19,8 @@ to training/test sets has been maintained. The total number of images
 with segmentation has been increased from 7,062 to 9,993.
 """
 
+from __future__ import print_function
+
 import tarfile
 import io
 import numpy as np

python/paddle/dataset/wmt14.py

@@ -19,6 +19,9 @@ http://paddlepaddle.cdn.bcebos.com/demo/wmt_shrinked_data/wmt14.tgz and
 parse training set and test set into paddle reader creators.
 
 """
+
+from __future__ import print_function
+
 import six
 import tarfile
 import gzip

python/paddle/dataset/wmt16.py

@@ -28,6 +28,8 @@ Multi30K: Multilingual English-German Image Descriptions.
 }
 """
 
+from __future__ import print_function
+
 import os
 import six
 import tarfile

python/paddle/fluid/average.py

@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import print_function
+
 import numpy as np
 import warnings
 """

python/paddle/fluid/backward.py

@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import print_function
+
 from paddle.fluid import framework as framework
 from . import core
 import collections

python/paddle/fluid/clip.py

@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import print_function
+
 import copy
 import six
 

python/paddle/fluid/concurrency.py

@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import print_function
+
 from .layers.control_flow import BlockGuard, equal
 from .framework import Operator
 from .layer_helper import LayerHelper, unique_name

python/paddle/fluid/contrib/__init__.py

@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import print_function
+
 from . import decoder
 from .decoder import *
 from . import memory_usage_calc

python/paddle/fluid/contrib/decoder/__init__.py

@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import print_function
+
 from . import beam_search_decoder
 from .beam_search_decoder import *
 

python/paddle/fluid/contrib/decoder/beam_search_decoder.py

@@ -20,6 +20,8 @@ without using the low level API such as while ops.
 This API is still under active development and may change drastically.
 """
 
+from __future__ import print_function
+
 import contextlib
 import numpy as np
 import six

python/paddle/fluid/contrib/memory_usage_calc.py

@@ -20,6 +20,8 @@ batch size to fully utilize a GPU.
 This API is still under active development and may change drastically.
 """
 
+from __future__ import print_function
+
 import six
 
 from .. import core

python/paddle/fluid/data_feeder.py

@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import print_function
+
 from . import core
 import numpy
 import os

python/paddle/fluid/debugger.py

@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import print_function
+
 import sys
 import six
 import re

python/paddle/fluid/default_scope_funcs.py

@@ -26,6 +26,8 @@ A `scoped_function` will take a `function` as input. That function will be
 invoked in a new local scope.
 """
 
+from __future__ import print_function
+
 import paddle.fluid.core
 import threading
 

python/paddle/fluid/evaluator.py

@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import print_function
+
 import warnings
 import numpy as np
 

python/paddle/fluid/executor.py

@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import print_function
+
 import numpy as np
 import contextlib
 import six

python/paddle/fluid/framework.py

@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import print_function
+
 import collections
 import contextlib
 import re

python/paddle/fluid/graphviz.py

@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import print_function
+
 import os
 import random
 import six

python/paddle/fluid/inferencer.py

@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import print_function
+
 import contextlib
 
 from . import core

python/paddle/fluid/initializer.py

@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import print_function
+
 from . import framework
 import numpy as np
 import contextlib

python/paddle/fluid/io.py

@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import print_function
+
 import os
 import errno
 import time

python/paddle/fluid/layer_helper.py

@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import print_function
+
 import copy
 import itertools
 import six

python/paddle/fluid/layers/__init__.py

@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import print_function
+
 from . import ops
 from .ops import *
 from . import nn

python/paddle/fluid/layers/control_flow.py

@@ -11,6 +11,8 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
+
+from __future__ import print_function
 import contextlib
 
 from .layer_function_generator import autodoc, templatedoc

python/paddle/fluid/layers/detection.py

@@ -15,6 +15,8 @@
 All layers just related to the detection neural network.
 """
 
+from __future__ import print_function
+
 from .layer_function_generator import generate_layer_fn
 from .layer_function_generator import autodoc, templatedoc
 from ..layer_helper import LayerHelper

python/paddle/fluid/layers/device.py

@@ -15,6 +15,8 @@
 All util layers.
 """
 
+from __future__ import print_function
+
 from .layer_function_generator import autodoc
 from ..framework import unique_name
 from ..layer_helper import LayerHelper

python/paddle/fluid/layers/io.py

@@ -11,6 +11,8 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
+
+from __future__ import print_function
 import contextlib
 import multiprocessing
 import six

python/paddle/fluid/layers/layer_function_generator.py

@@ -11,6 +11,8 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
+
+from __future__ import print_function
 import re
 import functools
 import warnings

python/paddle/fluid/layers/learning_rate_scheduler.py

@@ -20,6 +20,8 @@ User can also implement their own learning_rate_decay
 strategy according to this module.
 """
 
+from __future__ import print_function
+
 from . import control_flow
 from . import nn
 from . import ops
@@ -72,10 +74,10 @@ def noam_decay(d_model, warmup_steps):
 
 def exponential_decay(learning_rate, decay_steps, decay_rate, staircase=False):
     """
-    Applies exponential decay to the learning rate. 
+    Applies exponential decay to the learning rate.
 
-    When training a model, it is often recommended to lower the learning rate as the 
-    training progresses. By using this function, the learning rate will be decayed by 
+    When training a model, it is often recommended to lower the learning rate as the
+    training progresses. By using this function, the learning rate will be decayed by
     'decay_rate' every 'decay_steps' steps.
 
     >>> if staircase == True:
@@ -148,8 +150,8 @@ def inverse_time_decay(learning_rate, decay_steps, decay_rate, staircase=False):
     """
     Applies inverse time decay to the initial learning rate.
 
-    When training a model, it is often recommended to lower the learning rate as the 
-    training progresses. By using this function, an inverse decay function will be 
+    When training a model, it is often recommended to lower the learning rate as the
+    training progresses. By using this function, an inverse decay function will be
     applied to the initial learning rate.
 
     >>> if staircase == True:

python/paddle/fluid/layers/math_op_patch.py

@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import print_function
+
 from ..framework import Variable, unique_name
 from .layer_function_generator import OpProtoHolder
 from ..initializer import force_init_on_cpu

python/paddle/fluid/layers/metric_op.py

@@ -15,6 +15,8 @@
 All layers just related to metric.
 """
 
+from __future__ import print_function
+
 import warnings
 from ..layer_helper import LayerHelper
 from ..initializer import Normal, Constant
@@ -81,9 +83,9 @@ def auc(input, label, curve='ROC', num_thresholds=200, topk=1):
     **Area Under the Curve (AUC) Layer**
 
     This implementation computes the AUC according to forward output and label.
-    It is used very widely in binary classification evaluation. 
+    It is used very widely in binary classification evaluation.
 
-    Note: If input label contains values other than 0 and 1, it will be cast 
+    Note: If input label contains values other than 0 and 1, it will be cast
     to `bool`. Find the relevant definitions `here <https://en.wikipedia.org\
     /wiki/Receiver_operating_characteristic#Area_under_the_curve>`_.
 
@@ -93,14 +95,14 @@ def auc(input, label, curve='ROC', num_thresholds=200, topk=1):
         2. PR: Precision Recall
 
     Args:
-        input(Variable): A floating-point 2D Variable, values are in the range 
-                         [0, 1]. Each row is sorted in descending order. This 
-                         input should be the output of topk. Typically, this 
+        input(Variable): A floating-point 2D Variable, values are in the range
+                         [0, 1]. Each row is sorted in descending order. This
+                         input should be the output of topk. Typically, this
                          Variable indicates the probability of each label.
-        label(Variable): A 2D int Variable indicating the label of the training 
+        label(Variable): A 2D int Variable indicating the label of the training
                          data. The height is batch size and width is always 1.
         curve(str): Curve type, can be 'ROC' or 'PR'. Default 'ROC'.
-        num_thresholds(int): The number of thresholds to use when discretizing 
+        num_thresholds(int): The number of thresholds to use when discretizing
                              the roc curve. Default 200.
         topk(int): only topk number of prediction output will be used for auc.
 
@@ -109,7 +111,7 @@ def auc(input, label, curve='ROC', num_thresholds=200, topk=1):
 
     Examples:
         .. code-block:: python
-        
+
             # network is a binary classification model and label the ground truth
             prediction = network(image, is_infer=True)
             auc_out=fluid.layers.auc(input=prediction, label=label)

python/paddle/fluid/layers/nn.py

@@ -11,24 +11,12 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-
-#   Copyright (c ) 2018 PaddlePaddle Authors. All Rights Reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
 """
 All layers just related to the neural network.
 """
 
+from __future__ import print_function
+
 from ..layer_helper import LayerHelper
 from ..initializer import Normal, Constant
 from ..framework import Variable
@@ -1319,15 +1307,15 @@ def sequence_softmax(input, param_attr=None, bias_attr=None, use_cudnn=True):
 
 def softmax(input, param_attr=None, bias_attr=None, use_cudnn=True, name=None):
     """
-    The input of the softmax operator is a tensor of any rank. The output tensor 
+    The input of the softmax operator is a tensor of any rank. The output tensor
     has the same shape as the input.
 
-    The input tensor will first be logically flattened to a 2-D matrix. The matrix's 
-    second dimension(row length) is as same as the last dimension of the input 
-    tensor, and the first dimension(column length) is the product of all other 
-    dimensions of the input tensor. For each row of the matrix, the softmax operator 
-    squashes the K-dimensional(K is the width of the matrix, which is also the size 
-    of the input tensor's last dimension) vector of arbitrary real values to a 
+    The input tensor will first be logically flattened to a 2-D matrix. The matrix's
+    second dimension(row length) is as same as the last dimension of the input
+    tensor, and the first dimension(column length) is the product of all other
+    dimensions of the input tensor. For each row of the matrix, the softmax operator
+    squashes the K-dimensional(K is the width of the matrix, which is also the size
+    of the input tensor's last dimension) vector of arbitrary real values to a
     K-dimensional vector of real values in the range [0, 1] that add up to 1.
 
     It computes the exponential of the given dimension and the sum of exponential
@@ -5377,7 +5365,7 @@ def flatten(x, axis=1, name=None):
         axis = 2
       We get:
         Out.shape = (3 * 100, 4 * 100)
-    
+
     Case 2:
       Given
         X.shape = (3, 100, 100, 4)
@@ -5388,8 +5376,8 @@ def flatten(x, axis=1, name=None):
 
     Args:
         x (Variable): A tensor of rank >= axis.
-        axis (int): Indicate up to which input dimensions (exclusive) should 
-                    be flattened to the outer dimension of the output. 
+        axis (int): Indicate up to which input dimensions (exclusive) should
+                    be flattened to the outer dimension of the output.
                     The value for axis must be in the range [0, R], where R
                     is the rank of the input tensor. When axis = 0, the shape
                     of the output tensor is (1, (d_0 X d_1 ... d_n), where the
@@ -5405,7 +5393,7 @@ def flatten(x, axis=1, name=None):
 
     Raises:
         ValueError: If x is not a variable.
-        ValueError: If axis is not in range [0, rank(x)]. 
+        ValueError: If axis is not in range [0, rank(x)].
 
     Examples:
 

python/paddle/fluid/layers/ops.py

@@ -11,6 +11,8 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
+
+from __future__ import print_function
 from .layer_function_generator import generate_layer_fn
 
 __activations__ = [

python/paddle/fluid/layers/tensor.py

@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import print_function
+
 from ..layer_helper import LayerHelper
 from ..param_attr import ParamAttr
 from ..framework import convert_np_dtype_to_dtype_

python/paddle/fluid/layers/utils.py

@@ -11,6 +11,8 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
+
+from __future__ import print_function
 import numpy as np
 
 

python/paddle/fluid/lod_tensor.py

@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import print_function
+
 from . import core
 import numpy as np
 

python/paddle/fluid/metrics.py

@@ -16,6 +16,9 @@ Fluid Metrics
 
 The metrics are accomplished via Python natively.
 """
+
+from __future__ import print_function
+
 import numpy as np
 import copy
 import warnings

python/paddle/fluid/net_drawer.py

@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import print_function
+
 import argparse
 import json
 import logging

python/paddle/fluid/nets.py

@@ -11,6 +11,8 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
+
+from __future__ import print_function
 import six
 from . import layers
 

python/paddle/fluid/op.py

@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import print_function
+
 import numpy as np
 import six
 

python/paddle/fluid/optimizer.py

@@ -11,6 +11,8 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
+
+from __future__ import print_function
 import re
 from collections import defaultdict
 from paddle.fluid.framework import Program, Variable

python/paddle/fluid/param_attr.py

@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import print_function
+
 import six
 
 from .initializer import Initializer, Xavier, Constant

python/paddle/fluid/profiler.py

@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import print_function
+
 from . import core
 from contextlib import contextmanager
 import os

python/paddle/fluid/recordio_writer.py

@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import print_function
+
 import os
 import contextlib
 from . import core

python/paddle/fluid/regularizer.py

@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import print_function
+
 from . import framework
 from . import core
 

python/paddle/fluid/tests/book/high-level-api/fit_a_line/test_fit_a_line.py

@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import print_function
+
 import paddle
 import paddle.fluid as fluid
 import contextlib

python/paddle/fluid/tests/book/high-level-api/image_classification/cifar10_small_test_set.py

@@ -28,6 +28,8 @@ images per class.
 
 """
 
+from __future__ import print_function
+
 import itertools
 import numpy
 import paddle.dataset.common

python/paddle/fluid/tests/book/high-level-api/image_classification/test_image_classification_resnet.py

@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import print_function
+
 import paddle
 import paddle.fluid as fluid
 import numpy

python/paddle/fluid/tests/book/high-level-api/image_classification/test_image_classification_vgg.py

@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import print_function
+
 import paddle
 import paddle.fluid as fluid
 import numpy

python/paddle/fluid/tests/book/high-level-api/label_semantic_roles/test_label_semantic_roles_newapi.py

@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import print_function
+
 import paddle
 import paddle.fluid as fluid
 import numpy as np

python/paddle/fluid/tests/book/high-level-api/machine_translation/test_machine_translation.py

@@ -11,6 +11,8 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
+
+from __future__ import print_function
 import contextlib
 
 import numpy as np

python/paddle/fluid/tests/book/high-level-api/recognize_digits/test_recognize_digits_conv.py

@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import print_function
+
 import argparse
 import paddle.fluid as fluid
 import paddle.fluid.core as core

python/paddle/fluid/tests/book/high-level-api/recognize_digits/test_recognize_digits_mlp.py

@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import print_function
+
 import argparse
 import paddle.fluid as fluid
 import paddle

python/paddle/fluid/tests/book/high-level-api/recommender_system/test_recommender_system_newapi.py

@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import print_function
+
 import math
 import sys
 import numpy as np

python/paddle/fluid/tests/book/high-level-api/understand_sentiment/test_understand_sentiment_conv.py

@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import print_function
+
 import paddle
 import paddle.fluid as fluid
 from functools import partial

python/paddle/fluid/tests/book/high-level-api/understand_sentiment/test_understand_sentiment_dynamic_rnn.py

@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import print_function
+
 import paddle
 import paddle.fluid as fluid
 from functools import partial

python/paddle/fluid/tests/book/high-level-api/understand_sentiment/test_understand_sentiment_stacked_lstm.py

@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import print_function
+
 import paddle
 import paddle.fluid as fluid
 from functools import partial

python/paddle/fluid/tests/book/high-level-api/word2vec/test_word2vec_new_api.py

@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import print_function
+
 import paddle
 import paddle.fluid as fluid
 import numpy as np

python/paddle/fluid/tests/book/notest_understand_sentiment.py

@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import print_function
+
 from paddle.fluid.layers.device import get_places
 import unittest
 import paddle.fluid as fluid

python/paddle/fluid/tests/book/test_fit_a_line.py

@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import print_function
+
 import paddle
 import paddle.fluid as fluid
 import contextlib

python/paddle/fluid/tests/book/test_image_classification.py

@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import print_function
+
 import paddle
 import paddle.fluid as fluid
 import contextlib

python/paddle/fluid/tests/book/test_label_semantic_roles.py

@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import print_function
+
 import contextlib
 import math
 import numpy as np

python/paddle/fluid/tests/book/test_machine_translation.py

@@ -11,6 +11,8 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
+
+from __future__ import print_function
 import contextlib
 
 import numpy as np

python/paddle/fluid/tests/book/test_recognize_digits.py

@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import print_function
+
 import paddle.fluid.core as core
 import math
 import os

python/paddle/fluid/tests/book/test_recommender_system.py

@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import print_function
+
 import math
 import sys
 import os

python/paddle/fluid/tests/book/test_rnn_encoder_decoder.py

@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import print_function
+
 import numpy as np
 import paddle
 import paddle.fluid as fluid

python/paddle/fluid/tests/book/test_word2vec.py

@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import print_function
+
 import paddle
 import paddle.fluid as fluid
 from paddle.fluid.layers.device import get_places

python/paddle/fluid/tests/book_memory_optimization/test_memopt_fit_a_line.py

@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import print_function
+
 import math
 import sys
 

python/paddle/fluid/tests/book_memory_optimization/test_memopt_image_classification_train.py

@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import print_function
+
 import sys
 
 import paddle

python/paddle/fluid/tests/book_memory_optimization/test_memopt_machine_translation.py

@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import print_function
+
 import numpy as np
 import paddle
 import paddle.fluid as fluid

python/paddle/fluid/tests/demo/fc_gan.py

@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import print_function
+
 import errno
 import math
 import os

python/paddle/fluid/tests/demo/file_reader/convert_data_to_recordio.py

@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import print_function
+
 import sys
 import paddle.fluid as fluid
 import paddle.v2 as paddle

python/paddle/fluid/tests/demo/file_reader/train.py

@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import print_function
+
 import paddle.fluid as fluid
 import numpy
 import sys

python/paddle/fluid/tests/demo/pyreader.py

@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import print_function
+
 import numpy
 import six
 

python/paddle/fluid/tests/no_test_concurrency.py

@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import print_function
+
 import unittest
 import paddle.fluid as fluid
 import paddle.fluid.core as core

python/paddle/fluid/tests/notest_concurrency.py

@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import print_function
+
 import unittest
 import paddle.fluid as fluid
 import paddle.fluid.core as core

python/paddle/fluid/tests/test_beam_search_decoder.py

@@ -15,6 +15,8 @@
 A simple machine translation demo using beam search decoder.
 """
 
+from __future__ import print_function
+
 import contextlib
 import numpy as np
 import paddle