Merge pull request #12748 from velconia/port_pybind11

Port print_function and make more efficient

Author: velconia

python/paddle/dataset/cifar.py

@@ -28,6 +28,8 @@
 
 """
 
+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 @@
 to initialize SRL model.
 """
 
+from __future__ import print_function
+
 import tarfile
 import gzip
 import itertools

python/paddle/dataset/flowers.py

@@ -28,6 +28,9 @@
 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
@@ -117,7 +120,7 @@ def reader():
                 file = file.strip()
                 batch = None
                 with open(file, 'rb') as f:
-                    batch = pickle.loads(f.read())
+                    batch = pickle.load(f)
                 data = batch['data']
                 labels = batch['label']
                 for sample, label in zip(data, batch['label']):

python/paddle/dataset/image.py

@@ -29,6 +29,9 @@
   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 @@
 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 @@
 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 @@
 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 @@
 
 """
 
+from __future__ import print_function
+
 import zipfile
 import paddle.dataset.common
 import re

python/paddle/dataset/mq2007.py

@@ -23,6 +23,8 @@
 
 """
 
+from __future__ import print_function
+
 import os
 import functools
 import rarfile