diff --git a/core/engine/cluster/cluster.py b/core/engine/cluster/cluster.py
index 3ce6bf66cd64a387aca4f81437f48ded37970098..6dfcec3a929ad8124192014f48270ebd1862dc2c 100644
--- a/core/engine/cluster/cluster.py
+++ b/core/engine/cluster/cluster.py
@@ -15,9 +15,9 @@
 from __future__ import print_function
 from __future__ import unicode_literals
 
-import subprocess
-import os
 import copy
+import os
+import subprocess
 
 from paddlerec.core.engine.engine import Engine
 from paddlerec.core.factory import TrainerFactory
diff --git a/core/engine/local_cluster.py b/core/engine/local_cluster.py
index 72d440a825874b7334502cf3cab6ba6dd2ef4215..a0e4cf18f38c293823cbe14d1547d2d876ce94f9 100755
--- a/core/engine/local_cluster.py
+++ b/core/engine/local_cluster.py
@@ -14,10 +14,12 @@
 
 from __future__ import print_function
 from __future__ import unicode_literals
-import subprocess
-import sys
-import os
+
 import copy
+import os
+import sys
+import subprocess
+
 
 from paddlerec.core.engine.engine import Engine
 from paddlerec.core.utils import envs
diff --git a/core/engine/local_mpi.py b/core/engine/local_mpi.py
index 1f7a27a849e8629c56c1cf26d90b116569517454..49db821fe5764ae9ef7f42cbd3ca2fe77b83a1d1 100755
--- a/core/engine/local_mpi.py
+++ b/core/engine/local_mpi.py
@@ -14,10 +14,11 @@
 
 from __future__ import print_function
 from __future__ import unicode_literals
-import subprocess
-import sys
-import os
+
 import copy
+import os
+import sys
+import subprocess
 
 from paddlerec.core.engine.engine import Engine
 
diff --git a/core/metrics/auc_metrics.py b/core/metrics/auc_metrics.py
index 3c48040db29fc31846780f6f4e871168ac65f3f8..ece46a4d6ca9399b02830aae7d9f990f4a6d2d9f 100755
--- a/core/metrics/auc_metrics.py
+++ b/core/metrics/auc_metrics.py
@@ -13,8 +13,10 @@
 # limitations under the License.
 
 import math
+
 import numpy as np
 import paddle.fluid as fluid
+
 from paddlerec.core.metric import Metric
 
 
diff --git a/core/model.py b/core/model.py
index fbafc69560e0768fd7a5f73b684d9bd6cbfbc4f9..c51ba2417da7d6d7530f29c2b0bc9f5090d810ea 100755
--- a/core/model.py
+++ b/core/model.py
@@ -15,6 +15,7 @@
 import abc
 
 import paddle.fluid as fluid
+
 from paddlerec.core.utils import envs
 
 
diff --git a/core/modules/modul/build.py b/core/modules/modul/build.py
index fe065678713d777519b8bbfd909a7c4c16f72439..0263cbf60e3b1647a05cbc471b7bbff1840f88ba 100755
--- a/core/modules/modul/build.py
+++ b/core/modules/modul/build.py
@@ -12,10 +12,11 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import yaml
 import copy
+
 import paddle.fluid as fluid
 from paddle.fluid.incubate.fleet.parameter_server.pslib import fleet
+import yaml
 
 from paddlerec.core.model import Model
 from paddlerec.core.utils import table
diff --git a/core/modules/modul/layers.py b/core/modules/modul/layers.py
index f533a46db24da5e6feb3e8723ff3265529cfbcb3..c582798081e366aba1377caade1032958ae2b91a 100755
--- a/core/modules/modul/layers.py
+++ b/core/modules/modul/layers.py
@@ -13,6 +13,7 @@
 # limitations under the License.
 
 import paddle.fluid as fluid
+
 from paddlerec.core.layer import Layer
 
 
diff --git a/core/trainer.py b/core/trainer.py
index df5626b7a5317b9fd7f108964adf11afe0c59c0e..40fc35de973ce7841bfdf28dfc6c6a3751484be7 100755
--- a/core/trainer.py
+++ b/core/trainer.py
@@ -12,14 +12,14 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import os
-import sys
-
 import abc
+import os
 import time
+import sys
 import yaml
 
 from paddle import fluid
+
 from paddlerec.core.utils import envs
 
 
diff --git a/core/trainers/ctr_coding_trainer.py b/core/trainers/ctr_coding_trainer.py
index a6377c853853d3f1ab53c55b9a5253cf0ff8d5b7..e6979a922618c4ea118da26c1a08e6808276e482 100755
--- a/core/trainers/ctr_coding_trainer.py
+++ b/core/trainers/ctr_coding_trainer.py
@@ -11,9 +11,10 @@
 # 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.
+
 import os
-import numpy as np
 
+import numpy as np
 import paddle.fluid as fluid
 from paddle.fluid.incubate.fleet.parameter_server.pslib import fleet
 from paddle.fluid.incubate.fleet.base.role_maker import MPISymetricRoleMaker
diff --git a/core/trainers/ctr_modul_trainer.py b/core/trainers/ctr_modul_trainer.py
index 8c99a5c885ed1b8a577556c52d56c4a8ad04944c..d486767e300ce9d8ce6f56b4fb6b9820779e2df6 100755
--- a/core/trainers/ctr_modul_trainer.py
+++ b/core/trainers/ctr_modul_trainer.py
@@ -13,12 +13,12 @@
 # limitations under the License.
 
 
+import datetime
+import json
 import sys
 import time
-import json
-import datetime
-import numpy as np
 
+import numpy as np
 import paddle.fluid as fluid
 from paddle.fluid.incubate.fleet.parameter_server.pslib import fleet
 from paddle.fluid.incubate.fleet.base.role_maker import GeneralRoleMaker
diff --git a/core/trainers/online_learning_trainer.py b/core/trainers/online_learning_trainer.py
index 1924b966dd2ba34c4ca10e21471b39b4d3e793ab..4a64d4c278859071019d0932d96015210402e12e 100755
--- a/core/trainers/online_learning_trainer.py
+++ b/core/trainers/online_learning_trainer.py
@@ -18,9 +18,9 @@ Training use fluid with one node only.
 
 from __future__ import print_function
 
+import datetime
 import os
 import time
-import datetime
 
 import paddle.fluid as fluid
 from paddle.fluid.incubate.fleet.parameter_server.distribute_transpiler import fleet
diff --git a/core/trainers/single_trainer.py b/core/trainers/single_trainer.py
index 888a93f3ddb7c1045505fc98eebc15d6dd19e950..e2f02f4bd76ae7c2c6f6a3be5744f70828b8a8e7 100755
--- a/core/trainers/single_trainer.py
+++ b/core/trainers/single_trainer.py
@@ -17,14 +17,14 @@ Training use fluid with one node only.
 """
 
 from __future__ import print_function
-import logging
+
 import time
+import logging
 
 import paddle.fluid as fluid
 
 from paddlerec.core.trainers.transpiler_trainer import TranspileTrainer
 from paddlerec.core.utils import envs
-import numpy as np
 
 logging.basicConfig(format="%(asctime)s - %(levelname)s - %(message)s")
 logger = logging.getLogger("fluid")
diff --git a/core/trainers/tdm_cluster_trainer.py b/core/trainers/tdm_cluster_trainer.py
index 60e87bfdad5b8a68151f9e8ec489be0c91bee1e6..1ce2dfc9acc511e5ca946dba584eaeae5f905f07 100755
--- a/core/trainers/tdm_cluster_trainer.py
+++ b/core/trainers/tdm_cluster_trainer.py
@@ -17,7 +17,9 @@ Training use fluid with one node only.
 """
 
 from __future__ import print_function
+
 import logging
+
 import numpy as np
 import paddle.fluid as fluid
 from paddle.fluid.incubate.fleet.parameter_server.distribute_transpiler import fleet
diff --git a/core/trainers/tdm_single_trainer.py b/core/trainers/tdm_single_trainer.py
index 8890ffd70372a4b7f09de84ad1e3f25c3c6ad866..1e7700f34207694718cc7b781e8bdead6aba85e2 100755
--- a/core/trainers/tdm_single_trainer.py
+++ b/core/trainers/tdm_single_trainer.py
@@ -18,11 +18,12 @@ Training use fluid with one node only.
 
 from __future__ import print_function
 import logging
-import paddle.fluid as fluid
 
+import numpy as np
+import paddle.fluid as fluid
 from paddlerec.core.trainers.single_trainer import SingleTrainer
 from paddlerec.core.utils import envs
-import numpy as np
+
 
 logging.basicConfig(format="%(asctime)s - %(levelname)s - %(message)s")
 logger = logging.getLogger("fluid")
diff --git a/core/utils/dataset.py b/core/utils/dataset.py
index 0eff8da071920b9931ce073ff94abe253baa31a0..c02fb3d3cb3685cf8b00025931c77d118177ff32 100755
--- a/core/utils/dataset.py
+++ b/core/utils/dataset.py
@@ -13,8 +13,8 @@
 # limitations under the License.
 
 import abc
-import time
 import datetime
+import time
 
 import paddle.fluid as fluid
 
diff --git a/core/utils/dataset_instance.py b/core/utils/dataset_instance.py
index 94997b669a5579cae4a403422c92fe277fa046b6..731b3b47169d9e67735953c8488469d4d60cb296 100755
--- a/core/utils/dataset_instance.py
+++ b/core/utils/dataset_instance.py
@@ -11,6 +11,7 @@
 # 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 sys
 
diff --git a/core/utils/envs.py b/core/utils/envs.py
index 084cec0b9a20a74d5f0c1d35e98ab0c97a158e59..4fe57b32a6a534c630005d42e66b1aedc7972089 100755
--- a/core/utils/envs.py
+++ b/core/utils/envs.py
@@ -12,11 +12,11 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import os
+from contextlib import closing
 import copy
-import sys
+import os
 import socket
-from contextlib import closing
+import sys
 
 global_envs = {}
 
diff --git a/core/utils/fs.py b/core/utils/fs.py
index df2379721041197170945ebfd03ccf8f8cc61d0a..a1f5a843f635af93a2b43ee22fd354b8436ec968 100755
--- a/core/utils/fs.py
+++ b/core/utils/fs.py
@@ -13,6 +13,7 @@
 # limitations under the License.
 
 import os
+
 from paddle.fluid.incubate.fleet.utils.hdfs import HDFSClient
 
 
diff --git a/core/utils/util.py b/core/utils/util.py
index 76965f50ccf298dd63bd67e1c74d4f3d23c2fe72..bd63284873b6c6be80c9849f40535cebe1b7fb14 100755
--- a/core/utils/util.py
+++ b/core/utils/util.py
@@ -12,11 +12,12 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+import datetime
 import os
 import time
-import datetime
 
 from paddle import fluid
+
 from paddlerec.core.utils import fs as fs
 
 
diff --git a/models/contentunderstanding/classification/model.py b/models/contentunderstanding/classification/model.py
index 46869b44a5ae2671f31d75b6ac798ce5f4388fdc..18db63a5591340e2137d8a1af3e74d73f2fe0f52 100644
--- a/models/contentunderstanding/classification/model.py
+++ b/models/contentunderstanding/classification/model.py
@@ -12,11 +12,10 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+import paddle.fluid as fluid
 
 from paddlerec.core.model import Model as ModelBase
 
-import paddle.fluid as fluid
-
 
 class Model(ModelBase):
     def __init__(self, config):
diff --git a/models/contentunderstanding/classification/reader.py b/models/contentunderstanding/classification/reader.py
index 8c3f54863197df5b4b721ed9e4c80855990bbdfc..72b1837ab359df6888e02b6ca1084b73156c4dee 100644
--- a/models/contentunderstanding/classification/reader.py
+++ b/models/contentunderstanding/classification/reader.py
@@ -15,9 +15,9 @@
 
 import sys
 
-
 from paddlerec.core.reader import Reader
 
+
 class TrainReader(Reader):
     def init(self):
         pass
diff --git a/models/contentunderstanding/tagspace/model.py b/models/contentunderstanding/tagspace/model.py
index 7ed1fcf370fc82a9f36798d2700bdb072b1e9309..eb01efbab1295829a939bfa8607bbe4c7418e37f 100644
--- a/models/contentunderstanding/tagspace/model.py
+++ b/models/contentunderstanding/tagspace/model.py
@@ -12,13 +12,14 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from paddlerec.core.model import Model as ModelBase
-
 import paddle.fluid as fluid
 import paddle.fluid.layers.nn as nn
 import paddle.fluid.layers.tensor as tensor
 import paddle.fluid.layers.control_flow as cf
 
+from paddlerec.core.model import Model as ModelBase
+
+
 class Model(ModelBase):
     def __init__(self, config):
         ModelBase.__init__(self, config)
diff --git a/models/contentunderstanding/tagspace/reader.py b/models/contentunderstanding/tagspace/reader.py
index 8c912a68b852cc183414406aa7d1786955d2741b..596a9a13a613f4a940a77b5292c59781e62c2f55 100644
--- a/models/contentunderstanding/tagspace/reader.py
+++ b/models/contentunderstanding/tagspace/reader.py
@@ -14,10 +14,10 @@
 
 
 import sys
+
 import numpy as np
 
 from paddlerec.core.reader import Reader
-from paddlerec.core.utils import envs
 
 class TrainReader(Reader):
     def init(self):
diff --git a/models/match/dssm/synthetic_reader.py b/models/match/dssm/synthetic_reader.py
index cc829374435ea560d2d23bfab2386ca29c957c2d..25c2e43b839fa45188facd27a53a9e413e7f26a8 100755
--- a/models/match/dssm/synthetic_reader.py
+++ b/models/match/dssm/synthetic_reader.py
@@ -11,6 +11,7 @@
 # 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 paddlerec.core.reader import Reader
diff --git a/models/multitask/esmm/esmm_infer_reader.py b/models/multitask/esmm/esmm_infer_reader.py
index 6e94a1eed07bab82fa80ece0041f9b1e94bb531d..416c7a671aa0757d02f8de4957b8e6c2e8212fff 100644
--- a/models/multitask/esmm/esmm_infer_reader.py
+++ b/models/multitask/esmm/esmm_infer_reader.py
@@ -13,10 +13,10 @@
 # limitations under the License.
 from __future__ import print_function
 
-from paddlerec.core.reader import Reader
-from paddlerec.core.utils import envs
 from collections import defaultdict
-import numpy as np
+
+from paddlerec.core.reader import Reader
+
 
 
 class EvaluateReader(Reader):
diff --git a/models/multitask/esmm/esmm_reader.py b/models/multitask/esmm/esmm_reader.py
index f7aef643cd3db5c01c1cc3a632a99fa3fa342658..b0bed00fb8499472e1ea463068ab2d0c718c769a 100644
--- a/models/multitask/esmm/esmm_reader.py
+++ b/models/multitask/esmm/esmm_reader.py
@@ -11,12 +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.
+
 from __future__ import print_function
 
-from paddlerec.core.reader import Reader
-from paddlerec.core.utils import envs
 from collections import defaultdict
-import numpy as np
+
+from paddlerec.core.reader import Reader
 
 
 class TrainReader(Reader):
diff --git a/models/multitask/esmm/model.py b/models/multitask/esmm/model.py
index 1641f72d1e4eab39cfe7ce1aa5055c25d139fb16..dc68f7cf26b83b8424daaf4f604e8f301564bce8 100644
--- a/models/multitask/esmm/model.py
+++ b/models/multitask/esmm/model.py
@@ -12,12 +12,11 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import math
+import numpy as np
 import paddle.fluid as fluid
 
 from paddlerec.core.utils import envs
 from paddlerec.core.model import Model as ModelBase
-import numpy as np
 
 
 class Model(ModelBase):
diff --git a/models/multitask/mmoe/census_infer_reader.py b/models/multitask/mmoe/census_infer_reader.py
index c25ccea8c4416bbfe64d3cdda59f5ee13b0cfac1..c62de8e69ce6ccfbb4df1e1252d9630a84fc56b3 100644
--- a/models/multitask/mmoe/census_infer_reader.py
+++ b/models/multitask/mmoe/census_infer_reader.py
@@ -11,11 +11,10 @@
 # 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 paddlerec.core.reader import Reader
-from paddlerec.core.utils import envs
-import numpy as np
 
 
 class EvaluateReader(Reader):
diff --git a/models/multitask/mmoe/census_reader.py b/models/multitask/mmoe/census_reader.py
index 30997c632302c2a6e963099c9e2679978c9d9b61..abe6ba9a88c1cb0d7216c2facf8c2f4cf379577b 100644
--- a/models/multitask/mmoe/census_reader.py
+++ b/models/multitask/mmoe/census_reader.py
@@ -11,11 +11,10 @@
 # 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 paddlerec.core.reader import Reader
-from paddlerec.core.utils import envs
-import numpy as np
 
 
 class TrainReader(Reader):
diff --git a/models/multitask/mmoe/model.py b/models/multitask/mmoe/model.py
index 753bacae77f089dc709e34812ef109ac06aebcfb..7f54dda49703e8f2fe03ed69ff2e47143849e49d 100644
--- a/models/multitask/mmoe/model.py
+++ b/models/multitask/mmoe/model.py
@@ -12,7 +12,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import math
 import paddle.fluid as fluid
 
 from paddlerec.core.utils import envs
diff --git a/models/multitask/share-bottom/census_infer_reader.py b/models/multitask/share-bottom/census_infer_reader.py
index d4071a1bcdd6232a40fc006523b7bea7c5735de0..c62de8e69ce6ccfbb4df1e1252d9630a84fc56b3 100644
--- a/models/multitask/share-bottom/census_infer_reader.py
+++ b/models/multitask/share-bottom/census_infer_reader.py
@@ -11,6 +11,7 @@
 # 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 paddlerec.core.reader import Reader
diff --git a/models/rank/criteo_reader.py b/models/rank/criteo_reader.py
index 3d8fcf96a4be04f60fb9928e4db2190b306813ff..75994fb43f6ee3a72ab2aae25c36e0591c530fee 100755
--- a/models/rank/criteo_reader.py
+++ b/models/rank/criteo_reader.py
@@ -11,6 +11,7 @@
 # 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 paddlerec.core.reader import Reader
diff --git a/models/rank/dcn/criteo_reader.py b/models/rank/dcn/criteo_reader.py
index 5c180ee21f55cc651aba52323cf876b3d67b2c77..fde9e8822ac62582807a30a15914653c22eab9e7 100755
--- a/models/rank/dcn/criteo_reader.py
+++ b/models/rank/dcn/criteo_reader.py
@@ -11,16 +11,20 @@
 # 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 math
+import os
 
-from paddlerec.core.reader import Reader
-from paddlerec.core.utils import envs
 try:
     import cPickle as pickle
 except ImportError:
     import pickle
-import os
+
+
+from paddlerec.core.reader import Reader
+from paddlerec.core.utils import envs
+
 
 class TrainReader(Reader):
     def init(self):
diff --git a/models/rank/dcn/model.py b/models/rank/dcn/model.py
index d9292492e24aee257f271f7bee9e0abaee69806a..c34939aecae6391b70f4fd48af001598d5c90af4 100755
--- a/models/rank/dcn/model.py
+++ b/models/rank/dcn/model.py
@@ -12,11 +12,13 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from collections import OrderedDict
+
 import paddle.fluid as fluid
 
 from paddlerec.core.utils import envs
 from paddlerec.core.model import Model as ModelBase
-from collections import OrderedDict
+
 
 class Model(ModelBase):
     def __init__(self, config):
diff --git a/models/rank/deepfm/criteo_reader.py b/models/rank/deepfm/criteo_reader.py
index ae942e0a82eec7d90b0dab618310dc900985a4ee..87692ff9cc7c462eae77c5534fb990941fe53666 100755
--- a/models/rank/deepfm/criteo_reader.py
+++ b/models/rank/deepfm/criteo_reader.py
@@ -11,15 +11,18 @@
 # 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 paddlerec.core.reader import Reader
-from paddlerec.core.utils import envs
 try:
     import cPickle as pickle
 except ImportError:
     import pickle
 
+from paddlerec.core.reader import Reader
+from paddlerec.core.utils import envs
+
+
 class TrainReader(Reader):
     def init(self):
         self.cont_min_ = [0, -3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
diff --git a/models/rank/deepfm/model.py b/models/rank/deepfm/model.py
index 8636078d87e65eb3c7acacf528e0592d10506a45..ea24696847c9a656e3593f9da791cde1593d0061 100755
--- a/models/rank/deepfm/model.py
+++ b/models/rank/deepfm/model.py
@@ -12,9 +12,10 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import paddle.fluid as fluid
 import math
 
+import paddle.fluid as fluid
+
 from paddlerec.core.utils import envs
 from paddlerec.core.model import Model as ModelBase
 
diff --git a/models/rank/din/reader.py b/models/rank/din/reader.py
index d1742bddd8bbb5b98bdecaad0f43f438701cc480..44fa4a7c9b3d52fb371cc1ab1693a5d350e2bf6d 100755
--- a/models/rank/din/reader.py
+++ b/models/rank/din/reader.py
@@ -13,16 +13,20 @@
 # limitations under the License.
 from __future__ import print_function
 
-from paddlerec.core.reader import Reader
-from paddlerec.core.utils import envs
-import numpy as np
 import os
 import random
+
 try:
     import cPickle as pickle
 except ImportError:
     import pickle
 
+import numpy as np
+
+from paddlerec.core.reader import Reader
+from paddlerec.core.utils import envs
+
+
 class TrainReader(Reader):
     def init(self):
         self.train_data_path = envs.get_global_env("train_data_path", None, "train.reader")
diff --git a/models/rank/dnn/model.py b/models/rank/dnn/model.py
index 7a5ed0d421d851852bbe80ae9461c4dc6bbc6627..67bf61a04f0e93067f7a23fa3699ad08e6ce137f 100755
--- a/models/rank/dnn/model.py
+++ b/models/rank/dnn/model.py
@@ -13,6 +13,7 @@
 # limitations under the License.
 
 import math
+
 import paddle.fluid as fluid
 
 from paddlerec.core.utils import envs
diff --git a/models/rank/wide_deep/model.py b/models/rank/wide_deep/model.py
index 8e39cafc5f59a9c21486f826566dcda3951ec51a..a74bde09e83fa856f79a45e72bb7860addddccd4 100755
--- a/models/rank/wide_deep/model.py
+++ b/models/rank/wide_deep/model.py
@@ -12,9 +12,10 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import paddle.fluid as fluid
 import math
 
+import paddle.fluid as fluid
+
 from paddlerec.core.utils import envs
 from paddlerec.core.model import Model as ModelBase
 
diff --git a/models/rank/wide_deep/reader.py b/models/rank/wide_deep/reader.py
index f2a1058f018c31dfc45700fdc60be2150ffcfa01..633dce6e5851e531a8b6f7c0df8d3bb502e5afef 100755
--- a/models/rank/wide_deep/reader.py
+++ b/models/rank/wide_deep/reader.py
@@ -11,14 +11,17 @@
 # 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 paddlerec.core.reader import Reader
 try:
     import cPickle as pickle
 except ImportError:
     import pickle
 
+from paddlerec.core.reader import Reader
+
+
 class TrainReader(Reader):
     def init(self):
         pass
diff --git a/models/rank/xdeepfm/criteo_reader.py b/models/rank/xdeepfm/criteo_reader.py
index 237d7d6d72eb422ead7727b5438050101623f91a..6bf3290fdad2b6aae93de3a339acb081e8f15e23 100755
--- a/models/rank/xdeepfm/criteo_reader.py
+++ b/models/rank/xdeepfm/criteo_reader.py
@@ -11,14 +11,17 @@
 # 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 paddlerec.core.reader import Reader
 try:
     import cPickle as pickle
 except ImportError:
     import pickle
 
+from paddlerec.core.reader import Reader
+
+
 class TrainReader(Reader): 
     def init(self):
         pass
diff --git a/models/recall/gnn/evaluate_reader.py b/models/recall/gnn/evaluate_reader.py
index 4ced177e3fdb336b7f643b5a0d8f63b7e0aa5d0e..fa28fa6374e06d2f2f83d3f8a12153ef58499103 100755
--- a/models/recall/gnn/evaluate_reader.py
+++ b/models/recall/gnn/evaluate_reader.py
@@ -12,9 +12,11 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import numpy as np
 import copy
 import random
+
+import numpy as np
+
 from paddlerec.core.reader import Reader
 from paddlerec.core.utils import envs
 
diff --git a/models/recall/gnn/model.py b/models/recall/gnn/model.py
index ac628ec6209e9489ac20550a7837b60c9e8e3771..1228e6b028552bc4e96ac8ce80fecb329da1eabc 100755
--- a/models/recall/gnn/model.py
+++ b/models/recall/gnn/model.py
@@ -12,8 +12,9 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import numpy as np
 import math
+import numpy as np
+
 import paddle.fluid as fluid
 import paddle.fluid.layers as layers
 
diff --git a/models/recall/gnn/reader.py b/models/recall/gnn/reader.py
index d9aab524e10f62601adea8472fe1ebd0915b7770..ad6f63ddcc7166f132f151b19f6e5708d65ccace 100755
--- a/models/recall/gnn/reader.py
+++ b/models/recall/gnn/reader.py
@@ -12,9 +12,11 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import numpy as np
 import copy
 import random
+
+import numpy as np
+
 from paddlerec.core.reader import Reader
 from paddlerec.core.utils import envs
 
diff --git a/models/recall/gru4rec/rsc15_infer_reader.py b/models/recall/gru4rec/rsc15_infer_reader.py
index 4bde64cbf0bdb93a2863b9717c9509d993eb726a..b58532a471f4b70eedfebeeadb35df20b4c40e72 100644
--- a/models/recall/gru4rec/rsc15_infer_reader.py
+++ b/models/recall/gru4rec/rsc15_infer_reader.py
@@ -11,6 +11,7 @@
 # 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 paddlerec.core.reader import Reader
diff --git a/models/recall/gru4rec/rsc15_reader.py b/models/recall/gru4rec/rsc15_reader.py
index 0abd6f41db693c3297d2ef89408e646f37ea9c70..4fe9433a65e1ceec508891eecfaaa5e464bc9e24 100644
--- a/models/recall/gru4rec/rsc15_reader.py
+++ b/models/recall/gru4rec/rsc15_reader.py
@@ -11,6 +11,7 @@
 # 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 paddlerec.core.reader import Reader
diff --git a/models/recall/ssr/model.py b/models/recall/ssr/model.py
index e11e0cf1978713e00533da723c71a72d37abe734..ac986128c3b9d7e1331b74f4ab1753c588029c1f 100644
--- a/models/recall/ssr/model.py
+++ b/models/recall/ssr/model.py
@@ -13,12 +13,11 @@
 # limitations under the License.
 
 import paddle.fluid as fluid
-
-from paddlerec.core.utils import envs
-from paddlerec.core.model import Model as ModelBase
 import paddle.fluid.layers.tensor as tensor
 import paddle.fluid.layers.control_flow as cf
 
+from paddlerec.core.utils import envs
+from paddlerec.core.model import Model as ModelBase
 
 
 class BowEncoder(object):
diff --git a/models/recall/ssr/ssr_infer_reader.py b/models/recall/ssr/ssr_infer_reader.py
index 5a40280b101d8f7064b98346e1ec6c30ad1e2845..40e1bf6de78fb5a99f1e82a2efc6b59948d65a55 100644
--- a/models/recall/ssr/ssr_infer_reader.py
+++ b/models/recall/ssr/ssr_infer_reader.py
@@ -11,11 +11,14 @@
 # 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
+
 from paddlerec.core.reader import Reader
 from paddlerec.core.utils import envs
-import numpy as np
+
 
 
 class EvaluateReader(Reader):
diff --git a/models/recall/ssr/ssr_reader.py b/models/recall/ssr/ssr_reader.py
index ba00457560b006ae30b619a769ca99bd26dfcc7a..12e8bfb20532c9bc83c5989aabb288878bd6a6bf 100644
--- a/models/recall/ssr/ssr_reader.py
+++ b/models/recall/ssr/ssr_reader.py
@@ -11,11 +11,14 @@
 # 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 paddlerec.core.reader import Reader
 import random
 
+from paddlerec.core.reader import Reader
+
+
 
 class TrainReader(Reader):
     def init(self):
diff --git a/models/recall/word2vec/model.py b/models/recall/word2vec/model.py
index ea8e0f5e81e5554668ba9ad81cc7f80718a0b3b9..bf09a04648a71a6618b99ef7de7d7244aaecbdba 100755
--- a/models/recall/word2vec/model.py
+++ b/models/recall/word2vec/model.py
@@ -12,7 +12,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import math
 import numpy as np
 import paddle.fluid as fluid
 
diff --git a/models/recall/word2vec/preprocess.py b/models/recall/word2vec/preprocess.py
index 592f9755b761cf3d98c91f982de18de403c74298..07d7b3457f54703010cb5b9732d4a0efa14ffd17 100755
--- a/models/recall/word2vec/preprocess.py
+++ b/models/recall/word2vec/preprocess.py
@@ -13,13 +13,18 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+import io
+import math
 import os
 import random
 import re
 import six
+
+
 import argparse
-import io
-import math
+
+
+
 prog = re.compile("[^a-z ]", flags=0)
 
 
diff --git a/models/recall/word2vec/w2v_evaluate_reader.py b/models/recall/word2vec/w2v_evaluate_reader.py
index 96d483dbf90f041fda2821b998d9f711d66cc2f8..548fbedd7876ee7ab18dfaf95f153e17a25270b8 100755
--- a/models/recall/word2vec/w2v_evaluate_reader.py
+++ b/models/recall/word2vec/w2v_evaluate_reader.py
@@ -11,8 +11,11 @@
 # 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.
+
 import io
+
 import six
+
 from paddlerec.core.reader import Reader
 from paddlerec.core.utils import envs
 
diff --git a/models/recall/word2vec/w2v_reader.py b/models/recall/word2vec/w2v_reader.py
index 609a516a24ada32908f1748d6c4598be3d61accc..128e31e93ea50c39b61a62754cd0df42e6affd7c 100755
--- a/models/recall/word2vec/w2v_reader.py
+++ b/models/recall/word2vec/w2v_reader.py
@@ -11,8 +11,11 @@
 # 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.
-import numpy as np
+
 import io
+
+import numpy as np
+
 from paddlerec.core.reader import Reader
 from paddlerec.core.utils import envs
 
diff --git a/models/treebased/tdm/model.py b/models/treebased/tdm/model.py
index 0fc1adf9cd04286cdb31cc3ba08715574dbee18b..3ce23eeca097babc00208eb76905493747f7b49d 100755
--- a/models/treebased/tdm/model.py
+++ b/models/treebased/tdm/model.py
@@ -14,8 +14,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 """
+
 import paddle.fluid as fluid
-import math
 
 from paddlerec.core.utils import envs
 from paddlerec.core.model import Model as ModelBase
diff --git a/run.py b/run.py
index 6c0e06f77a644a1166ee8c318e057ade2d060643..56999935f21bc1de2b2bc7b4a080da023559174a 100755
--- a/run.py
+++ b/run.py
@@ -12,11 +12,11 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import argparse
 import os
 import subprocess
-import tempfile
 
+import argparse
+import tempfile
 import yaml
 
 from paddlerec.core.factory import TrainerFactory
diff --git a/setup.py b/setup.py
index ab0c2792a25ad0df70857d22f4610479beb97bb5..a368bc3d1c3d75a0be6aa910c6d27198e6f3a3d3 100644
--- a/setup.py
+++ b/setup.py
@@ -15,10 +15,13 @@
 """
 setup for paddle-rec.
 """
+
 import os
+
 from setuptools import setup, find_packages
-import tempfile
 import shutil
+import tempfile
+
 
 requires = [
     "paddlepaddle == 1.7.2",
diff --git a/tools/tools.py b/tools/tools.py
index ec85326cf71374aa4139a58ffc0cf05535543949..8508a790bc8012954b53cc43b088d2e50655647d 100644
--- a/tools/tools.py
+++ b/tools/tools.py
@@ -12,15 +12,16 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+import functools
 import os
-import time
+import platform
+import sys
 import shutil
+import time
+
 import requests
-import sys
 import tarfile
 import zipfile
-import platform
-import functools
 
 lasttime = time.time()
 FLUSH_INTERVAL = 0.1