diff --git a/fluid/image_classification/_ce.py b/fluid/image_classification/_ce.py
index 5eb8e24534bf266241cc071e9291719c1c17b1d8..8b826b93628aa23631172ac7449f740fe3894484 100644
--- a/fluid/image_classification/_ce.py
+++ b/fluid/image_classification/_ce.py
@@ -1,5 +1,7 @@
 ####this file is only used for continuous evaluation test!
-
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
 import os
 import sys
 sys.path.append(os.environ['ceroot'])
@@ -7,14 +9,14 @@ from kpi import CostKpi, DurationKpi, AccKpi
 
 #### NOTE kpi.py should shared in models in some way!!!!
 
-train_acc_top1_kpi = AccKpi('train_acc_top1', 0.005, 0, desc='TOP1 ACC')
+train_acc_top1_kpi = AccKpi('train_acc_top1', 0.05, 0, desc='TOP1 ACC')
 train_acc_top5_kpi = AccKpi(
-    'train_acc_top5', 0.005, 0, actived=True, desc='TOP5 ACC')
+    'train_acc_top5', 0.05, 0, actived=True, desc='TOP5 ACC')
 train_cost_kpi = CostKpi('train_cost', 0.5, 0, actived=True, desc='train cost')
-test_acc_top1_kpi = AccKpi('test_acc_top1', 0.005, 0, desc='TOP1 ACC')
+test_acc_top1_kpi = AccKpi('test_acc_top1', 0.05, 0, desc='TOP1 ACC')
 test_acc_top5_kpi = AccKpi(
-    'test_acc_top5', 0.005, 0, actived=True, desc='TOP5 ACC')
-test_cost_kpi = CostKpi('test_cost', 0.005, 0, actived=True, desc='train cost')
+    'test_acc_top5', 0.05, 0, actived=True, desc='TOP5 ACC')
+test_cost_kpi = CostKpi('test_cost', 0.05, 0, actived=True, desc='train cost')
 train_speed_kpi = AccKpi(
     'train_speed',
     0.5,
@@ -23,17 +25,17 @@ train_speed_kpi = AccKpi(
     unit_repr='seconds/image',
     desc='train speed in one GPU card')
 train_acc_top1_card4_kpi = AccKpi(
-    'train_acc_top1_card4', 0.005, 0, desc='TOP1 ACC')
+    'train_acc_top1_card4', 0.05, 0, desc='TOP1 ACC')
 train_acc_top5_card4_kpi = AccKpi(
-    'train_acc_top5_card4', 0.005, 0, actived=True, desc='TOP5 ACC')
+    'train_acc_top5_card4', 0.05, 0, actived=True, desc='TOP5 ACC')
 train_cost_card4_kpi = CostKpi(
-    'train_cost_kpi', 0.005, 0, actived=True, desc='train cost')
+    'train_cost_kpi', 0.05, 0, actived=True, desc='train cost')
 test_acc_top1_card4_kpi = AccKpi(
-    'test_acc_top1_card4', 0.005, 0, desc='TOP1 ACC')
+    'test_acc_top1_card4', 0.05, 0, desc='TOP1 ACC')
 test_acc_top5_card4_kpi = AccKpi(
-    'test_acc_top5_card4', 0.005, 0, actived=True, desc='TOP5 ACC')
+    'test_acc_top5_card4', 0.05, 0, actived=True, desc='TOP5 ACC')
 test_cost_card4_kpi = CostKpi(
-    'test_cost_card4', 0.005, 0, actived=True, desc='train cost')
+    'test_cost_card4', 0.05, 0, actived=True, desc='train cost')
 train_speed_card4_kpi = AccKpi(
     'train_speed_card4',
     0.5,
diff --git a/fluid/image_classification/eval.py b/fluid/image_classification/eval.py
index e0c96d0f1333e69a5260ae7ae88af8729033cdcf..7d265e525e063488fd758c77b1d90550e6afdf9f 100644
--- a/fluid/image_classification/eval.py
+++ b/fluid/image_classification/eval.py
@@ -1,3 +1,6 @@
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
 import os
 import numpy as np
 import time
diff --git a/fluid/image_classification/infer.py b/fluid/image_classification/infer.py
index a835926da248d926de36d1c46bc3f7df7265b1d0..19d204a1a21fde57f4c9b28e0c61cb9fd02edc3c 100644
--- a/fluid/image_classification/infer.py
+++ b/fluid/image_classification/infer.py
@@ -1,3 +1,6 @@
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
 import os
 import numpy as np
 import time
@@ -15,7 +18,6 @@ import math
 parser = argparse.ArgumentParser(description=__doc__)
 # yapf: disable
 add_arg = functools.partial(add_arguments, argparser=parser)
-add_arg('batch_size',       int,  256,                  "Minibatch size.")
 add_arg('use_gpu',          bool, True,                 "Whether to use GPU or not.")
 add_arg('class_dim',        int,  1000,                 "Class number.")
 add_arg('image_shape',      str,  "3,224,224",          "Input image size")
diff --git a/fluid/image_classification/models/alexnet.py b/fluid/image_classification/models/alexnet.py
index b090f6bddbd8a73025fecde30c1296e078fdb222..3e0eab2dee1d2f2e8d3cb2e8c12a3504a1e7c0e5 100644
--- a/fluid/image_classification/models/alexnet.py
+++ b/fluid/image_classification/models/alexnet.py
@@ -1,3 +1,6 @@
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
 import paddle
 import paddle.fluid as fluid
 import math
diff --git a/fluid/image_classification/models/dpn.py b/fluid/image_classification/models/dpn.py
index 8f0680aad09025ba61aa352c9bc16766798e89d9..d9144eeb6e7dc781e33aad9b4f54ce0f3b9e903d 100644
--- a/fluid/image_classification/models/dpn.py
+++ b/fluid/image_classification/models/dpn.py
@@ -1,13 +1,12 @@
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
 import os
 import numpy as np
 import time
 import sys
-import paddle
-import paddle.fluid as fluid
-import paddle.fluid.layers.control_flow as control_flow
-import paddle.fluid.layers.nn as nn
-import paddle.fluid.layers.tensor as tensor
 import math
+import paddle.fluid as fluid
 
 __all__ = ["DPN", "DPN68", "DPN92", "DPN98", "DPN107", "DPN131"]
 
@@ -67,7 +66,7 @@ class DPN(object):
         for gc in range(4):
             bw = bws[gc]
             inc = inc_sec[gc]
-            R = (k_r * bw) / rs[gc]
+            R = (k_r * bw) // rs[gc]
             if gc == 0:
                 _type1 = 'proj'
                 _type2 = 'normal'
@@ -178,8 +177,8 @@ class DPN(object):
                           _type='normal'):
         kw = 3
         kh = 3
-        pw = (kw - 1) / 2
-        ph = (kh - 1) / 2
+        pw = (kw - 1) // 2
+        ph = (kh - 1) // 2
 
         # type
         if _type is 'proj':
diff --git a/fluid/image_classification/models/googlenet.py b/fluid/image_classification/models/googlenet.py
index 5f8043a2b69a8883f6662185921009e6b977ded9..ebc8566e129296a453bd59109ffaf37f0760660a 100644
--- a/fluid/image_classification/models/googlenet.py
+++ b/fluid/image_classification/models/googlenet.py
@@ -1,3 +1,6 @@
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
 import paddle
 import paddle.fluid as fluid
 
@@ -36,7 +39,7 @@ class GoogleNet():
             num_filters=num_filters,
             filter_size=filter_size,
             stride=stride,
-            padding=(filter_size - 1) / 2,
+            padding=(filter_size - 1) // 2,
             groups=groups,
             act=act,
             param_attr=param_attr,
diff --git a/fluid/image_classification/models/inception_v4.py b/fluid/image_classification/models/inception_v4.py
index 51c7266f69571b4f38d5a68b4de7838d72afc2b9..d3a80a20500f365166d50a0cf222613d0427354f 100644
--- a/fluid/image_classification/models/inception_v4.py
+++ b/fluid/image_classification/models/inception_v4.py
@@ -1,3 +1,6 @@
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
 import paddle
 import paddle.fluid as fluid
 import math
diff --git a/fluid/image_classification/models/learning_rate.py b/fluid/image_classification/models/learning_rate.py
index d8c137e6db8f5ecaac7f7b43d6537e16d2ae03c8..a385a931c0cfc68abd9ee61c009226e14b0be8b4 100644
--- a/fluid/image_classification/models/learning_rate.py
+++ b/fluid/image_classification/models/learning_rate.py
@@ -1,3 +1,6 @@
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
 import paddle
 import paddle.fluid as fluid
 import paddle.fluid.layers.ops as ops
diff --git a/fluid/image_classification/models/mobilenet.py b/fluid/image_classification/models/mobilenet.py
index bae564fc31f19b4b9abb9c0e7c3c1488ab7b9219..f3554734768d5bbec96dac2443b48389d235da91 100644
--- a/fluid/image_classification/models/mobilenet.py
+++ b/fluid/image_classification/models/mobilenet.py
@@ -1,3 +1,6 @@
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
 import paddle.fluid as fluid
 from paddle.fluid.initializer import MSRA
 from paddle.fluid.param_attr import ParamAttr
diff --git a/fluid/image_classification/models/resnet.py b/fluid/image_classification/models/resnet.py
index b3a6956222173aba8d7350e30e6c5344a7317682..75c7b750541c60821a624f95a2ab56d2890fcb25 100644
--- a/fluid/image_classification/models/resnet.py
+++ b/fluid/image_classification/models/resnet.py
@@ -1,3 +1,6 @@
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
 import paddle
 import paddle.fluid as fluid
 import math
@@ -75,7 +78,7 @@ class ResNet():
             num_filters=num_filters,
             filter_size=filter_size,
             stride=stride,
-            padding=(filter_size - 1) / 2,
+            padding=(filter_size - 1) // 2,
             groups=groups,
             act=None,
             bias_attr=False)
diff --git a/fluid/image_classification/models/se_resnext.py b/fluid/image_classification/models/se_resnext.py
index 272880c7cffd28f9ce09507b5ab931abb219d874..3821381f290f1ea9457f6081a3c1176b3676d3e7 100644
--- a/fluid/image_classification/models/se_resnext.py
+++ b/fluid/image_classification/models/se_resnext.py
@@ -1,3 +1,6 @@
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
 import paddle
 import paddle.fluid as fluid
 import math
@@ -156,7 +159,7 @@ class SE_ResNeXt():
             num_filters=num_filters,
             filter_size=filter_size,
             stride=stride,
-            padding=(filter_size - 1) / 2,
+            padding=(filter_size - 1) // 2,
             groups=groups,
             act=None,
             bias_attr=False)
@@ -167,7 +170,7 @@ class SE_ResNeXt():
             input=input, pool_size=0, pool_type='avg', global_pooling=True)
         stdv = 1.0 / math.sqrt(pool.shape[1] * 1.0)
         squeeze = fluid.layers.fc(input=pool,
-                                  size=num_channels / reduction_ratio,
+                                  size=num_channels // reduction_ratio,
                                   act='relu',
                                   param_attr=fluid.param_attr.ParamAttr(
                                       initializer=fluid.initializer.Uniform(
diff --git a/fluid/image_classification/models/vgg.py b/fluid/image_classification/models/vgg.py
index 6b6f8bd171902d0ea1d27a00a66dce2722f745c5..1af664fdb554f05ba8a556abbba36cd1c3141a40 100644
--- a/fluid/image_classification/models/vgg.py
+++ b/fluid/image_classification/models/vgg.py
@@ -1,3 +1,6 @@
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
 import paddle
 import paddle.fluid as fluid
 
diff --git a/fluid/image_classification/train.py b/fluid/image_classification/train.py
index 48bf53297db35ac7cb5fc4cf0f9fb8ad6c1bf1e8..c72f626a0e8be898fdaa5320d72209366e68673e 100644
--- a/fluid/image_classification/train.py
+++ b/fluid/image_classification/train.py
@@ -1,17 +1,20 @@
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
 import os
 import numpy as np
 import time
 import sys
+import functools
+import math
 import paddle
 import paddle.fluid as fluid
 import paddle.dataset.flowers as flowers
 import models
 import reader
 import argparse
-import functools
 from models.learning_rate import cosine_decay
 from utility import add_arguments, print_arguments
-import math
 
 parser = argparse.ArgumentParser(description=__doc__)
 add_arg = functools.partial(add_arguments, argparser=parser)
@@ -106,8 +109,9 @@ def train(args):
         assert model_name == "SE_ResNeXt50_32x4d"
         fluid.default_startup_program().random_seed = 1000
         model.params["dropout_seed"] = 100
+        class_dim = 102
 
-    if model_name is "GoogleNet":
+    if model_name == "GoogleNet":
         out0, out1, out2 = model.net(input=image, class_dim=class_dim)
         cost0 = fluid.layers.cross_entropy(input=out0, label=label)
         cost1 = fluid.layers.cross_entropy(input=out1, label=label)
diff --git a/fluid/image_classification/utility.py b/fluid/image_classification/utility.py
index 506e6007ceb9059caf1163befb6ff594d67b547a..5b10a179ac2231cb26ab42993b7300d5e99f44bc 100644
--- a/fluid/image_classification/utility.py
+++ b/fluid/image_classification/utility.py
@@ -18,6 +18,7 @@ from __future__ import division
 from __future__ import print_function
 import distutils.util
 import numpy as np
+import six
 from paddle.fluid import core
 
 
@@ -37,7 +38,7 @@ def print_arguments(args):
     :type args: argparse.Namespace
     """
     print("-----------  Configuration Arguments -----------")
-    for arg, value in sorted(vars(args).iteritems()):
+    for arg, value in sorted(six.iteritems(vars(args))):
         print("%s: %s" % (arg, value))
     print("------------------------------------------------")