diff --git a/pyproject.toml b/pyproject.toml
index 2c53986c539cafcf6f0232aa47afa2f72b7a645a..2530f0936b03da98b3042af826261accd57ca2b0 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -19,13 +19,6 @@ extend_skip_glob = [
     "python/paddle/fluid/tests/unittests/mlu/**",
 
     # These files will be fixed in the future
-    "cmake/**",
-    "paddle/**",
-    "r/**",
-    "tools/**",
-    "python/paddle/[!f]**",
-    "python/paddle/fluid/tests/unittests/[t-z]**",
     "python/paddle/fluid/tests/unittests/dygraph_to_static/test_error.py",
-    "python/paddle/fluid/tests/unittests/dygraph_to_static/**",
-    "python/paddle/fluid/tests/unittests/ipu/test_dy2static_ipu.py",
+    "python/paddle/jit/**",
 ]
diff --git a/python/paddle/distributed/passes/auto_parallel_data_parallel_optimization.py b/python/paddle/distributed/passes/auto_parallel_data_parallel_optimization.py
index 47759484a66ee294f804fc0d402bac6f7dbc3b06..66f80ee995049151c570e9a03f25852876e9b9ae 100644
--- a/python/paddle/distributed/passes/auto_parallel_data_parallel_optimization.py
+++ b/python/paddle/distributed/passes/auto_parallel_data_parallel_optimization.py
@@ -15,24 +15,25 @@
 from collections import OrderedDict
 
 import paddle
-from paddle.fluid import unique_name
-from paddle.fluid.framework import default_main_program
-from paddle.distributed.fleet.meta_optimizers.common import OP_ROLE_KEY, OpRole
-from .pass_base import PassBase, PassType, register_pass
 from paddle.distributed.auto_parallel.operators.common import (
-    is_data_parallel_scale_op,
     is_data_parallel_reduce_op,
+    is_data_parallel_scale_op,
 )
 from paddle.distributed.auto_parallel.utils import (
     find_higher_order_backward_op,
+    get_var_numel,
+    insert_dependencies_for_two_vars,
+    is_forward_op,
     is_loss_grad_op,
     is_optimize_op,
-    is_forward_op,
     ring_id_to_process_group,
-    get_var_numel,
     use_standalone_executor,
-    insert_dependencies_for_two_vars,
 )
+from paddle.distributed.fleet.meta_optimizers.common import OP_ROLE_KEY, OpRole
+from paddle.fluid import unique_name
+from paddle.fluid.framework import default_main_program
+
+from .pass_base import PassBase, PassType, register_pass
 
 # add new optimizers supporting rescale_grad here
 __rescale_grad_supported_opts__ = [
diff --git a/python/paddle/distributed/passes/auto_parallel_grad_clip.py b/python/paddle/distributed/passes/auto_parallel_grad_clip.py
index a475f8e0ac317e3ac82d731bd1b50ee8f54a386c..af5259680e4a596042c5307c416c443a2477a104 100644
--- a/python/paddle/distributed/passes/auto_parallel_grad_clip.py
+++ b/python/paddle/distributed/passes/auto_parallel_grad_clip.py
@@ -12,27 +12,28 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import numpy as np
 from functools import reduce
 
+import numpy as np
+
 import paddle
 
-from .pass_base import PassBase, register_pass
-from ..auto_parallel.reshard import Resharder
+from ..auto_parallel.dist_attribute import (
+    OperatorDistributedAttribute,
+    TensorDistributedAttribute,
+)
 from ..auto_parallel.process_group import get_world_process_group
+from ..auto_parallel.reshard import Resharder
 from ..auto_parallel.utils import (
-    is_gradient_clip_op,
-    is_optimize_op,
     OP_ROLE_KEY,
     OpRole,
     _get_comm_group,
     insert_dependencies_for_two_vars,
+    is_gradient_clip_op,
+    is_optimize_op,
     use_standalone_executor,
 )
-from ..auto_parallel.dist_attribute import (
-    TensorDistributedAttribute,
-    OperatorDistributedAttribute,
-)
+from .pass_base import PassBase, register_pass
 
 
 def _get_params_grads(block):
diff --git a/python/paddle/distribution/normal.py b/python/paddle/distribution/normal.py
index b3877af277fbb96b5e949d120bc902dfdd1441a4..3eb3fd2d59009c48cf28a64fd6129ea5e0acaf06 100644
--- a/python/paddle/distribution/normal.py
+++ b/python/paddle/distribution/normal.py
@@ -21,10 +21,7 @@ import paddle
 from paddle.distribution import distribution
 from paddle.fluid.data_feeder import check_type, convert_dtype
 from paddle.fluid.framework import _non_static_mode
-from paddle.fluid.layers import (
-    nn,
-    tensor,
-)
+from paddle.fluid.layers import nn, tensor
 
 
 class Normal(distribution.Distribution):
diff --git a/python/paddle/distribution/uniform.py b/python/paddle/distribution/uniform.py
index b9566d3c8dbc274c182570bdba07199eeacd9c6e..1b1ef5906d964338f5c969f66c5ba274c39a7bdc 100644
--- a/python/paddle/distribution/uniform.py
+++ b/python/paddle/distribution/uniform.py
@@ -23,12 +23,7 @@ from paddle.fluid.framework import (
     _non_static_mode,
     in_dygraph_mode,
 )
-from paddle.fluid.layers import (
-    nn,
-    tensor,
-)
-
-import paddle
+from paddle.fluid.layers import nn, tensor
 from paddle.tensor import random
 
 
diff --git a/python/paddle/fluid/tests/unittests/dygraph_to_static/bert_dygraph_model.py b/python/paddle/fluid/tests/unittests/dygraph_to_static/bert_dygraph_model.py
index 8eb757d87ac4f90ad1aad644272699cde777f5c3..3e372a6d9408f6219ddec27b369bb3fd2d403567 100644
--- a/python/paddle/fluid/tests/unittests/dygraph_to_static/bert_dygraph_model.py
+++ b/python/paddle/fluid/tests/unittests/dygraph_to_static/bert_dygraph_model.py
@@ -17,8 +17,8 @@ from transformer_dygraph_model import MultiHeadAttention, PrePostProcessLayer
 import paddle
 import paddle.fluid as fluid
 from paddle.fluid.dygraph import Embedding, Layer
-from paddle.nn import Linear
 from paddle.jit.api import declarative
+from paddle.nn import Linear
 
 
 class PositionwiseFeedForwardLayer(Layer):
diff --git a/python/paddle/fluid/tests/unittests/dygraph_to_static/simnet_dygraph_model.py b/python/paddle/fluid/tests/unittests/dygraph_to_static/simnet_dygraph_model.py
index f236faccdc2df8a78e40ab96f7522a8dcb1b4621..075900b939fdf16342f69646e351c6129f04ae84 100644
--- a/python/paddle/fluid/tests/unittests/dygraph_to_static/simnet_dygraph_model.py
+++ b/python/paddle/fluid/tests/unittests/dygraph_to_static/simnet_dygraph_model.py
@@ -17,9 +17,6 @@ from functools import reduce
 import paddle
 import paddle.fluid as fluid
 import paddle.fluid.param_attr as attr
-
-from functools import reduce
-
 from paddle.fluid.dygraph import Embedding, Layer
 from paddle.jit.api import declarative
 from paddle.static import Variable
diff --git a/python/paddle/fluid/tests/unittests/dygraph_to_static/test_convert_call.py b/python/paddle/fluid/tests/unittests/dygraph_to_static/test_convert_call.py
index 302045ed4038f22861db0019756958a663e37c11..743fff189cb9f860840d4a6083b09bb14f938f4d 100644
--- a/python/paddle/fluid/tests/unittests/dygraph_to_static/test_convert_call.py
+++ b/python/paddle/fluid/tests/unittests/dygraph_to_static/test_convert_call.py
@@ -12,19 +12,17 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+import logging
 import unittest
 
-import logging
 import numpy as np
+from test_program_translator import get_source_code
 
 import paddle
 import paddle.fluid as fluid
-from paddle.jit import ProgramTranslator
-from paddle.jit.dy2static.convert_call_func import (
-    CONVERSION_OPTIONS,
-)
-from test_program_translator import get_source_code
 import paddle.jit.dy2static as _jst
+from paddle.jit import ProgramTranslator
+from paddle.jit.dy2static.convert_call_func import CONVERSION_OPTIONS
 
 program_translator = ProgramTranslator()
 
diff --git a/python/paddle/fluid/tests/unittests/dygraph_to_static/test_lac.py b/python/paddle/fluid/tests/unittests/dygraph_to_static/test_lac.py
index dd4e7e6746d1ce8b7114e2728b772cef06704b01..54b97c9280a404f650bdc93773690daf4fd92b2c 100644
--- a/python/paddle/fluid/tests/unittests/dygraph_to_static/test_lac.py
+++ b/python/paddle/fluid/tests/unittests/dygraph_to_static/test_lac.py
@@ -24,10 +24,8 @@ os.environ["CUDA_VISIBLE_DEVICES"] = "2"
 
 import paddle
 import paddle.fluid as fluid
-from paddle.fluid.dygraph import to_variable
-from paddle.fluid.dygraph import Embedding, GRUUnit
-
 from paddle import _legacy_C_ops
+from paddle.fluid.dygraph import Embedding, GRUUnit, to_variable
 from paddle.fluid.dygraph.io import INFER_MODEL_SUFFIX, INFER_PARAMS_SUFFIX
 from paddle.fluid.framework import _non_static_mode
 from paddle.jit import ProgramTranslator
diff --git a/python/paddle/fluid/tests/unittests/dygraph_to_static/test_len.py b/python/paddle/fluid/tests/unittests/dygraph_to_static/test_len.py
index 6ab1fbc9f2065718b54cd858aef5c66ac4b3ad54..3acd56b6f6fc7314bb1f6f303e6d2f6e25b17e76 100644
--- a/python/paddle/fluid/tests/unittests/dygraph_to_static/test_len.py
+++ b/python/paddle/fluid/tests/unittests/dygraph_to_static/test_len.py
@@ -15,6 +15,7 @@
 import unittest
 
 import numpy as np
+
 import paddle
 import paddle.fluid as fluid
 from paddle.jit.api import declarative
diff --git a/python/paddle/fluid/tests/unittests/dygraph_to_static/test_logical.py b/python/paddle/fluid/tests/unittests/dygraph_to_static/test_logical.py
index 97454a8cefb5a69b8f6d4b75e0ec83f34f503a10..fd335c41ba24ef6bb0ea4a1e61d19b4a705d37d1 100644
--- a/python/paddle/fluid/tests/unittests/dygraph_to_static/test_logical.py
+++ b/python/paddle/fluid/tests/unittests/dygraph_to_static/test_logical.py
@@ -22,10 +22,7 @@ import numpy as np
 import paddle
 import paddle.fluid as fluid
 from paddle.jit import ProgramTranslator
-from paddle.jit.dy2static.logical_transformer import (
-    cmpop_node_to_str,
-)
-from paddle.jit import ProgramTranslator
+from paddle.jit.dy2static.logical_transformer import cmpop_node_to_str
 from paddle.utils import gast
 
 program_translator = ProgramTranslator()
diff --git a/python/paddle/fluid/tests/unittests/dygraph_to_static/test_loop.py b/python/paddle/fluid/tests/unittests/dygraph_to_static/test_loop.py
index c6c8a392274f2fcfd3190f20d22014755a09b98f..06b17978d6687ff2fa9487475ac5159653003864 100644
--- a/python/paddle/fluid/tests/unittests/dygraph_to_static/test_loop.py
+++ b/python/paddle/fluid/tests/unittests/dygraph_to_static/test_loop.py
@@ -12,15 +12,16 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from paddle.utils import gast
 import inspect
+import unittest
+
 import numpy as np
+
 import paddle
 import paddle.fluid as fluid
-import unittest
-
-from paddle.jit.dy2static.loop_transformer import NameVisitor
 from paddle.jit.api import declarative
+from paddle.jit.dy2static.loop_transformer import NameVisitor
+from paddle.utils import gast
 
 SEED = 2020
 np.random.seed(SEED)
diff --git a/python/paddle/fluid/tests/unittests/dygraph_to_static/test_mnist.py b/python/paddle/fluid/tests/unittests/dygraph_to_static/test_mnist.py
index fe7e463e1db2f3403bcd3737f4a2c4b284e10712..43947a505e6b7540ce2b4d93e1affa5a10b2c04a 100644
--- a/python/paddle/fluid/tests/unittests/dygraph_to_static/test_mnist.py
+++ b/python/paddle/fluid/tests/unittests/dygraph_to_static/test_mnist.py
@@ -23,11 +23,11 @@ from predictor_utils import PredictorTools
 import paddle
 import paddle.fluid as fluid
 from paddle.fluid.dygraph import to_variable
-from paddle.nn import Linear
 from paddle.fluid.dygraph.base import switch_to_static_graph
 from paddle.fluid.dygraph.io import INFER_MODEL_SUFFIX, INFER_PARAMS_SUFFIX
 from paddle.fluid.framework import _test_eager_guard
 from paddle.fluid.optimizer import AdamOptimizer
+from paddle.nn import Linear
 
 SEED = 2020
 
diff --git a/python/paddle/fluid/tests/unittests/dygraph_to_static/test_mobile_net.py b/python/paddle/fluid/tests/unittests/dygraph_to_static/test_mobile_net.py
index b40eb92753dacca665c1f3fa968f1fb3101a9fbd..2c458b006daaf6b6a97535a3ab493f3cea438ada 100644
--- a/python/paddle/fluid/tests/unittests/dygraph_to_static/test_mobile_net.py
+++ b/python/paddle/fluid/tests/unittests/dygraph_to_static/test_mobile_net.py
@@ -26,16 +26,9 @@ from paddle.fluid.dygraph.io import INFER_MODEL_SUFFIX, INFER_PARAMS_SUFFIX
 from paddle.fluid.dygraph.nn import BatchNorm, Linear
 from paddle.fluid.initializer import MSRA
 from paddle.fluid.param_attr import ParamAttr
-from paddle.fluid.dygraph.nn import BatchNorm
-from paddle.nn import Linear
-from paddle.jit.api import declarative
 from paddle.jit import ProgramTranslator
-
-from paddle.fluid.dygraph.io import INFER_MODEL_SUFFIX, INFER_PARAMS_SUFFIX
-
-import unittest
-
-from predictor_utils import PredictorTools
+from paddle.jit.api import declarative
+from paddle.nn import Linear
 
 # Note: Set True to eliminate randomness.
 #     1. For one operation, cuDNN has several algorithms,
diff --git a/python/paddle/fluid/tests/unittests/dygraph_to_static/test_reinforcement_learning.py b/python/paddle/fluid/tests/unittests/dygraph_to_static/test_reinforcement_learning.py
index 15e6827766a311b10e5e516b9bbbf35f32860513..b98d9c304dc9a33ae089c322da390ae44d667025 100644
--- a/python/paddle/fluid/tests/unittests/dygraph_to_static/test_reinforcement_learning.py
+++ b/python/paddle/fluid/tests/unittests/dygraph_to_static/test_reinforcement_learning.py
@@ -21,7 +21,7 @@ import numpy as np
 
 import paddle
 import paddle.fluid as fluid
-from paddle.fluid.dygraph import to_variable, Layer
+from paddle.fluid.dygraph import Layer, to_variable
 from paddle.jit import ProgramTranslator
 from paddle.jit.api import declarative
 
diff --git a/python/paddle/fluid/tests/unittests/dygraph_to_static/test_resnet.py b/python/paddle/fluid/tests/unittests/dygraph_to_static/test_resnet.py
index fec0109168b50d91cd9a59c6a526ca17063ca037..00d6f24da345dbbc3c243d23c00a55800fb48275 100644
--- a/python/paddle/fluid/tests/unittests/dygraph_to_static/test_resnet.py
+++ b/python/paddle/fluid/tests/unittests/dygraph_to_static/test_resnet.py
@@ -17,16 +17,14 @@ import os
 import tempfile
 import time
 import unittest
-import paddle
+
 import numpy as np
 from predictor_utils import PredictorTools
 
 import paddle
 import paddle.fluid as fluid
-
-from paddle.fluid.dygraph.nn import BatchNorm
-from paddle.jit import ProgramTranslator
 from paddle.fluid.dygraph.io import INFER_MODEL_SUFFIX, INFER_PARAMS_SUFFIX
+from paddle.fluid.dygraph.nn import BatchNorm
 from paddle.jit import ProgramTranslator
 
 SEED = 2020
diff --git a/python/paddle/fluid/tests/unittests/dygraph_to_static/test_save_inference_model.py b/python/paddle/fluid/tests/unittests/dygraph_to_static/test_save_inference_model.py
index c22c78fefe3d2f5822a0ceb4b15995e2637290ab..461e9791d23ad3c153af35ff50e8edb4632f48eb 100644
--- a/python/paddle/fluid/tests/unittests/dygraph_to_static/test_save_inference_model.py
+++ b/python/paddle/fluid/tests/unittests/dygraph_to_static/test_save_inference_model.py
@@ -15,16 +15,15 @@
 import os
 import tempfile
 import unittest
+
 import numpy as np
 
 import paddle
 import paddle.fluid as fluid
+from paddle.fluid.dygraph.io import INFER_MODEL_SUFFIX, INFER_PARAMS_SUFFIX
 from paddle.jit import ProgramTranslator
 from paddle.jit.api import declarative
-from paddle.jit.dy2static.partial_program import (
-    partial_program_from,
-)
-from paddle.fluid.dygraph.io import INFER_MODEL_SUFFIX, INFER_PARAMS_SUFFIX
+from paddle.jit.dy2static.partial_program import partial_program_from
 
 SEED = 2020
 
diff --git a/python/paddle/fluid/tests/unittests/dygraph_to_static/test_save_load.py b/python/paddle/fluid/tests/unittests/dygraph_to_static/test_save_load.py
index b64bd35a0b0666e6a59c670f82d1529fa0c4f5e6..d9b0feeaeeca71696a19db99af581a77bd78925e 100644
--- a/python/paddle/fluid/tests/unittests/dygraph_to_static/test_save_load.py
+++ b/python/paddle/fluid/tests/unittests/dygraph_to_static/test_save_load.py
@@ -12,16 +12,16 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import unittest
 import os
 import tempfile
+import unittest
 
 import numpy as np
-import paddle.fluid as fluid
+from test_fetch_feed import Linear
 
-from paddle.jit import ProgramTranslator
+import paddle.fluid as fluid
 from paddle.fluid.optimizer import AdamOptimizer
-from test_fetch_feed import Linear
+from paddle.jit import ProgramTranslator
 
 np.random.seed(2020)
 
diff --git a/python/paddle/fluid/tests/unittests/dygraph_to_static/test_se_resnet.py b/python/paddle/fluid/tests/unittests/dygraph_to_static/test_se_resnet.py
index 4b1aad178d0208bd1fb2123b2a9c842afa719fe2..269f50a8dd9c5f19cdc394ebd55e112cdb108e90 100644
--- a/python/paddle/fluid/tests/unittests/dygraph_to_static/test_se_resnet.py
+++ b/python/paddle/fluid/tests/unittests/dygraph_to_static/test_se_resnet.py
@@ -25,11 +25,11 @@ from predictor_utils import PredictorTools
 import paddle
 import paddle.fluid as fluid
 from paddle.fluid.dygraph.base import to_variable
-from paddle.fluid.dygraph.nn import BatchNorm
-from paddle.nn import Linear
 from paddle.fluid.dygraph.io import INFER_MODEL_SUFFIX, INFER_PARAMS_SUFFIX
+from paddle.fluid.dygraph.nn import BatchNorm
 from paddle.jit import ProgramTranslator
 from paddle.jit.api import declarative
+from paddle.nn import Linear
 
 SEED = 2020
 np.random.seed(SEED)
diff --git a/python/paddle/fluid/tests/unittests/dygraph_to_static/test_sentiment.py b/python/paddle/fluid/tests/unittests/dygraph_to_static/test_sentiment.py
index b02f6f418b3afa2494e179d6a97fc82f97477fcb..ef9436864a83f4c02878f5f83fad02351e57ccaf 100644
--- a/python/paddle/fluid/tests/unittests/dygraph_to_static/test_sentiment.py
+++ b/python/paddle/fluid/tests/unittests/dygraph_to_static/test_sentiment.py
@@ -19,12 +19,11 @@ from test_lac import DynamicGRU
 
 import paddle
 import paddle.fluid as fluid
-from paddle.fluid.dygraph.nn import Embedding
-from paddle.nn import Linear
 from paddle.fluid.dygraph import to_variable
 from paddle.fluid.dygraph.nn import Embedding, Linear
 from paddle.jit import ProgramTranslator
 from paddle.jit.api import declarative
+from paddle.nn import Linear
 
 SEED = 2020
 program_translator = ProgramTranslator()
diff --git a/python/paddle/fluid/tests/unittests/dygraph_to_static/test_seq2seq.py b/python/paddle/fluid/tests/unittests/dygraph_to_static/test_seq2seq.py
index c7bef3d7b1ca3a160e3e4cd6bb43efcefbcb9c62..4a83495987cac71a5369d4b1e7baea2d1dd76806 100644
--- a/python/paddle/fluid/tests/unittests/dygraph_to_static/test_seq2seq.py
+++ b/python/paddle/fluid/tests/unittests/dygraph_to_static/test_seq2seq.py
@@ -18,14 +18,13 @@ import time
 import unittest
 
 import numpy as np
+from seq2seq_dygraph_model import AttentionModel, BaseModel
+from seq2seq_utils import Seq2SeqModelHyperParams, get_data_iter
+
 import paddle.fluid as fluid
 from paddle.fluid.clip import GradientClipByGlobalNorm
 from paddle.jit import ProgramTranslator
 
-from seq2seq_dygraph_model import BaseModel, AttentionModel
-from seq2seq_utils import Seq2SeqModelHyperParams
-from seq2seq_utils import get_data_iter
-
 place = (
     fluid.CUDAPlace(0) if fluid.is_compiled_with_cuda() else fluid.CPUPlace()
 )
diff --git a/python/paddle/fluid/tests/unittests/dygraph_to_static/test_tsm.py b/python/paddle/fluid/tests/unittests/dygraph_to_static/test_tsm.py
index 0919e4bced39b076d5012236c342461bb1933619..9c52786842dfd5766ab524efa77dc9a335cb550a 100644
--- a/python/paddle/fluid/tests/unittests/dygraph_to_static/test_tsm.py
+++ b/python/paddle/fluid/tests/unittests/dygraph_to_static/test_tsm.py
@@ -23,12 +23,11 @@ from tsm_config_utils import merge_configs, parse_config, print_configs
 
 import paddle
 import paddle.fluid as fluid
+from paddle.fluid.dygraph import to_variable
 from paddle.fluid.dygraph.nn import BatchNorm
-from paddle.nn import Linear
-from paddle.jit.api import declarative
 from paddle.jit import ProgramTranslator
-from paddle.fluid.dygraph import to_variable
-from tsm_config_utils import merge_configs, parse_config, print_configs
+from paddle.jit.api import declarative
+from paddle.nn import Linear
 
 random.seed(0)
 np.random.seed(0)
diff --git a/python/paddle/fluid/tests/unittests/dygraph_to_static/test_word2vec.py b/python/paddle/fluid/tests/unittests/dygraph_to_static/test_word2vec.py
index fb7027e88be6018109864a8dcdd489c7763ae8c2..44dd23a4c3abe14d20b4e20dd6ae548790a7fc69 100644
--- a/python/paddle/fluid/tests/unittests/dygraph_to_static/test_word2vec.py
+++ b/python/paddle/fluid/tests/unittests/dygraph_to_static/test_word2vec.py
@@ -14,13 +14,12 @@
 
 import math
 import random
-import paddle
-import numpy as np
-import paddle
-import paddle.fluid as fluid
 import unittest
 
+import numpy as np
+
 import paddle
+import paddle.fluid as fluid
 from paddle.fluid.dygraph.nn import Embedding
 from paddle.jit import ProgramTranslator
 from paddle.jit.api import declarative
diff --git a/python/paddle/fluid/tests/unittests/dygraph_to_static/transformer_dygraph_model.py b/python/paddle/fluid/tests/unittests/dygraph_to_static/transformer_dygraph_model.py
index fb00473f3d4521a4dd7e656438e9600fe2fc3013..209127104bd4fde4327191f8e81bf2fb8b9eb4cb 100644
--- a/python/paddle/fluid/tests/unittests/dygraph_to_static/transformer_dygraph_model.py
+++ b/python/paddle/fluid/tests/unittests/dygraph_to_static/transformer_dygraph_model.py
@@ -18,15 +18,10 @@ import paddle
 import paddle.fluid as fluid
 import paddle.fluid.layers as layers
 import paddle.nn.functional as F
-from paddle.fluid.dygraph import (
-    Embedding,
-    Layer,
-    LayerNorm,
-    to_variable,
-)
-from paddle.nn import Linear
+from paddle.fluid.dygraph import Embedding, Layer, LayerNorm, to_variable
 from paddle.fluid.layers.utils import map_structure
 from paddle.jit.api import dygraph_to_static_func
+from paddle.nn import Linear
 
 
 def position_encoding_init(n_position, d_pos_vec):
diff --git a/python/paddle/fluid/tests/unittests/test_add_position_encoding_op.py b/python/paddle/fluid/tests/unittests/test_add_position_encoding_op.py
index c908bfb5a4fc33660e3675e761c57cf752cfa50f..89c52dc203bca86732e8df05f9b767811da68aaa 100644
--- a/python/paddle/fluid/tests/unittests/test_add_position_encoding_op.py
+++ b/python/paddle/fluid/tests/unittests/test_add_position_encoding_op.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 math
 import unittest
+
 import numpy as np
-import math
 from op_test import OpTest
 
 
diff --git a/python/paddle/fluid/tests/unittests/test_affine_channel_op.py b/python/paddle/fluid/tests/unittests/test_affine_channel_op.py
index 5221fd9d69465c12a73f33bde238cdf77a91db9a..1153d92a06fddf1ed795237aec794a1894b4f5da 100644
--- a/python/paddle/fluid/tests/unittests/test_affine_channel_op.py
+++ b/python/paddle/fluid/tests/unittests/test_affine_channel_op.py
@@ -16,6 +16,7 @@ Unit testing for affine_channel_op
 """
 
 import unittest
+
 import numpy as np
 from op_test import OpTest
 
diff --git a/python/paddle/fluid/tests/unittests/test_data_norm_op.py b/python/paddle/fluid/tests/unittests/test_data_norm_op.py
index b5a2e76fe87bf980414b424d61eb104645975d14..2b84f2b5685af7280970105f91d91159689ff726 100644
--- a/python/paddle/fluid/tests/unittests/test_data_norm_op.py
+++ b/python/paddle/fluid/tests/unittests/test_data_norm_op.py
@@ -14,13 +14,15 @@
 """This is unit test of Test data_norm Op."""
 
 import unittest
+
 import numpy as np
+from op_test import OpTest
+
 import paddle
-import paddle.fluid.core as core
-from paddle.fluid.op import Operator
 import paddle.fluid as fluid
-from op_test import OpTest
+import paddle.fluid.core as core
 from paddle.fluid import Program, program_guard
+from paddle.fluid.op import Operator
 
 
 def _reference_testing(x, batch_size, batch_sum, batch_square_sum, slot_dim=-1):
diff --git a/python/paddle/fluid/tests/unittests/test_detach.py b/python/paddle/fluid/tests/unittests/test_detach.py
index cf7214b858889b8f0bf98793c2fc0c53a1ab3d33..58190b150e6c783cd3ce537a94e6f376d31a29b5 100644
--- a/python/paddle/fluid/tests/unittests/test_detach.py
+++ b/python/paddle/fluid/tests/unittests/test_detach.py
@@ -18,8 +18,8 @@ import numpy as np
 
 import paddle
 import paddle.fluid as fluid
-from paddle.nn import Linear
 from paddle.fluid.dygraph.base import to_variable
+from paddle.nn import Linear
 
 
 class Test_Detach(unittest.TestCase):
diff --git a/python/paddle/fluid/tests/unittests/test_dygraph_mnist_fp16.py b/python/paddle/fluid/tests/unittests/test_dygraph_mnist_fp16.py
index b9a130be6bfbb85dab769834d5664283b6548f6b..477db13a701b70e9920e91639eb78bb42e8f0256 100644
--- a/python/paddle/fluid/tests/unittests/test_dygraph_mnist_fp16.py
+++ b/python/paddle/fluid/tests/unittests/test_dygraph_mnist_fp16.py
@@ -18,8 +18,8 @@ import numpy as np
 
 import paddle
 import paddle.fluid as fluid
-from paddle.nn import Linear
 from paddle.fluid.framework import _test_eager_guard
+from paddle.nn import Linear
 
 
 class SimpleImgConvPool(fluid.dygraph.Layer):
diff --git a/python/paddle/fluid/tests/unittests/test_dygraph_multi_forward.py b/python/paddle/fluid/tests/unittests/test_dygraph_multi_forward.py
index d8b8c2ac4f0dff01fa477fe91967c4a189a7648f..fd7f97063b646cad7ca871f20560cf9ffefc3793 100644
--- a/python/paddle/fluid/tests/unittests/test_dygraph_multi_forward.py
+++ b/python/paddle/fluid/tests/unittests/test_dygraph_multi_forward.py
@@ -20,9 +20,9 @@ from test_imperative_base import new_program_scope
 import paddle
 import paddle.fluid as fluid
 from paddle.fluid import core
-from paddle.nn import Linear
 from paddle.fluid.dygraph.base import to_variable
 from paddle.fluid.optimizer import SGDOptimizer
+from paddle.nn import Linear
 
 SEED = 123123111
 
diff --git a/python/paddle/fluid/tests/unittests/test_executor_return_tensor_not_overwriting.py b/python/paddle/fluid/tests/unittests/test_executor_return_tensor_not_overwriting.py
index 9671448e3ff912432ccfd24c184dd21107cd7805..954d47287bfe13dcac899cde3d18bd8e0fcc607a 100644
--- a/python/paddle/fluid/tests/unittests/test_executor_return_tensor_not_overwriting.py
+++ b/python/paddle/fluid/tests/unittests/test_executor_return_tensor_not_overwriting.py
@@ -13,10 +13,11 @@
 # limitations under the License.
 
 import unittest
-import paddle
+
 import numpy as np
 from op_test import OpTest, skip_check_grad_ci
 
+import paddle
 import paddle.fluid as fluid
 
 
diff --git a/python/paddle/fluid/tests/unittests/test_fill_zeros_like2_op.py b/python/paddle/fluid/tests/unittests/test_fill_zeros_like2_op.py
index 5cf61d53b30eef2b4d80c389c2a8b0e20635546a..a610e52037be6788b0061dcd6fb41e7c9ecc07c1 100644
--- a/python/paddle/fluid/tests/unittests/test_fill_zeros_like2_op.py
+++ b/python/paddle/fluid/tests/unittests/test_fill_zeros_like2_op.py
@@ -16,6 +16,7 @@ import unittest
 
 import numpy as np
 from op_test import OpTest
+
 from paddle.fluid.framework import convert_np_dtype_to_dtype_
 
 
diff --git a/python/paddle/fluid/tests/unittests/test_fuse_elewise_add_act_pass.py b/python/paddle/fluid/tests/unittests/test_fuse_elewise_add_act_pass.py
index 6f3bc21e4bb86d84e8a5bfd042015ade61450876..b840fa205dc95fe9219a911cb56e9605d8305bb9 100644
--- a/python/paddle/fluid/tests/unittests/test_fuse_elewise_add_act_pass.py
+++ b/python/paddle/fluid/tests/unittests/test_fuse_elewise_add_act_pass.py
@@ -14,10 +14,11 @@
 
 import os
 import unittest
-import numpy
 
+import numpy
 from parallel_executor_test_base import DeviceType, TestParallelExecutorBase
 from simple_nets import fc_with_batchnorm, init_data, simple_fc_net
+
 import paddle
 import paddle.fluid as fluid
 import paddle.fluid.core as core
diff --git a/python/paddle/fluid/tests/unittests/test_group_norm_op.py b/python/paddle/fluid/tests/unittests/test_group_norm_op.py
index 2b74636939e9932d7e062ec45ac79b058be87475..24f0bc2a0b1f00ff4bb202652d68fe26a84f6abb 100644
--- a/python/paddle/fluid/tests/unittests/test_group_norm_op.py
+++ b/python/paddle/fluid/tests/unittests/test_group_norm_op.py
@@ -13,14 +13,15 @@
 # limitations under the License.
 
 import unittest
+
 import numpy as np
+from op_test import OpTest, skip_check_grad_ci
+from testsuite import create_op
 
 import paddle
-import paddle.fluid.core as core
 import paddle.fluid as fluid
-from op_test import OpTest, skip_check_grad_ci
+import paddle.fluid.core as core
 from paddle.fluid.framework import _test_eager_guard
-from testsuite import create_op
 
 
 def group_norm_naive(x, scale, bias, epsilon, groups, data_layout):
diff --git a/python/paddle/fluid/tests/unittests/test_imperative_basic.py b/python/paddle/fluid/tests/unittests/test_imperative_basic.py
index f92a248168793dd7795b046060a78ef8a183242e..4441098c941413e1519a41b69cb221ba4eaf5020 100644
--- a/python/paddle/fluid/tests/unittests/test_imperative_basic.py
+++ b/python/paddle/fluid/tests/unittests/test_imperative_basic.py
@@ -19,8 +19,8 @@ from test_imperative_base import new_program_scope
 
 import paddle
 import paddle.fluid as fluid
-from paddle.fluid import core
 import paddle.fluid.dygraph_utils as dygraph_utils
+from paddle.fluid import core
 from paddle.fluid.dygraph.layer_object_helper import LayerObjectHelper
 from paddle.fluid.framework import _in_legacy_dygraph, _test_eager_guard
 from paddle.fluid.layer_helper import LayerHelper
diff --git a/python/paddle/fluid/tests/unittests/test_imperative_container_sequential.py b/python/paddle/fluid/tests/unittests/test_imperative_container_sequential.py
index eca6e5d81d0109bd6b6f9e889c207ecdcff873ec..1049c08c64d40a2c136ae9ab56e1975d3f57654d 100644
--- a/python/paddle/fluid/tests/unittests/test_imperative_container_sequential.py
+++ b/python/paddle/fluid/tests/unittests/test_imperative_container_sequential.py
@@ -15,10 +15,10 @@
 import unittest
 
 import numpy as np
-from paddle.nn import Linear
 
 import paddle.fluid as fluid
 from paddle.fluid.framework import _test_eager_guard
+from paddle.nn import Linear
 
 
 class TestImperativeContainerSequential(unittest.TestCase):
diff --git a/python/paddle/fluid/tests/unittests/test_imperative_deepcf.py b/python/paddle/fluid/tests/unittests/test_imperative_deepcf.py
index 532dddd87c5ce3b245142af9fc7658449fa66e9a..c4e280ea46fd0b819989e66ffc898e4cbf95081b 100644
--- a/python/paddle/fluid/tests/unittests/test_imperative_deepcf.py
+++ b/python/paddle/fluid/tests/unittests/test_imperative_deepcf.py
@@ -24,8 +24,8 @@ import paddle
 import paddle.fluid as fluid
 import paddle.fluid.core as core
 from paddle.fluid.dygraph.base import to_variable
-from paddle.nn import Linear
 from paddle.fluid.framework import _test_eager_guard
+from paddle.nn import Linear
 
 
 class DMF(fluid.Layer):
diff --git a/python/paddle/fluid/tests/unittests/test_imperative_framework.py b/python/paddle/fluid/tests/unittests/test_imperative_framework.py
index 4aec8b308a6c8d51bc9d8daf6e22051387c43dfa..abdc8edd89edfa3a52cb2d964f0d518c3cfc917c 100644
--- a/python/paddle/fluid/tests/unittests/test_imperative_framework.py
+++ b/python/paddle/fluid/tests/unittests/test_imperative_framework.py
@@ -20,7 +20,6 @@ from test_imperative_base import new_program_scope
 import paddle
 import paddle.fluid as fluid
 from paddle.fluid.framework import _test_eager_guard
-import paddle
 
 
 class MLP(fluid.Layer):
diff --git a/python/paddle/fluid/tests/unittests/test_imperative_gan.py b/python/paddle/fluid/tests/unittests/test_imperative_gan.py
index 6b0e4fb66f5748bf6db979936e929546a40ddf1a..845f47434e59d7d7d3df2849d10e2d7f772f1676 100644
--- a/python/paddle/fluid/tests/unittests/test_imperative_gan.py
+++ b/python/paddle/fluid/tests/unittests/test_imperative_gan.py
@@ -20,10 +20,10 @@ from test_imperative_base import new_program_scope
 import paddle
 import paddle.fluid as fluid
 import paddle.fluid.core as core
-from paddle.nn import Linear
 from paddle.fluid.dygraph.base import to_variable
 from paddle.fluid.framework import _test_eager_guard
 from paddle.fluid.optimizer import SGDOptimizer
+from paddle.nn import Linear
 
 
 class Discriminator(fluid.Layer):
diff --git a/python/paddle/fluid/tests/unittests/test_imperative_layer_trainable.py b/python/paddle/fluid/tests/unittests/test_imperative_layer_trainable.py
index 335db28d70c2d036e53f7a07d5902067530efad2..73f101ed5ee280882d3a4773106db8bd5da9defa 100644
--- a/python/paddle/fluid/tests/unittests/test_imperative_layer_trainable.py
+++ b/python/paddle/fluid/tests/unittests/test_imperative_layer_trainable.py
@@ -16,10 +16,10 @@ import unittest
 
 import numpy as np
 
+import paddle
 import paddle.fluid as fluid
 import paddle.fluid.dygraph as dygraph
 from paddle.fluid.framework import _test_eager_guard
-import paddle
 
 
 class TestImperativeLayerTrainable(unittest.TestCase):
diff --git a/python/paddle/fluid/tests/unittests/test_imperative_load_static_param.py b/python/paddle/fluid/tests/unittests/test_imperative_load_static_param.py
index 8e9b6c7f2ff8ef40b0cd7fa0fa2fe97c41fd21b1..528ddac3ff4e57f757d05ea760499322c9b9e6d1 100644
--- a/python/paddle/fluid/tests/unittests/test_imperative_load_static_param.py
+++ b/python/paddle/fluid/tests/unittests/test_imperative_load_static_param.py
@@ -27,13 +27,9 @@ from paddle.fluid.dygraph.nn import (
     Embedding,
     GroupNorm,
     LayerNorm,
-    NCE,
     PRelu,
 )
 from paddle.nn import Linear
-import numpy as np
-import os
-import tempfile
 
 
 class TestDygraphLoadStatic(unittest.TestCase):
diff --git a/python/paddle/fluid/tests/unittests/test_imperative_mnist.py b/python/paddle/fluid/tests/unittests/test_imperative_mnist.py
index 69796f69c6b23c9da03ccd350fd92ff6b605ca2a..66d7eb19fb4031b96d28dd22f29eb163b3352637 100644
--- a/python/paddle/fluid/tests/unittests/test_imperative_mnist.py
+++ b/python/paddle/fluid/tests/unittests/test_imperative_mnist.py
@@ -15,16 +15,15 @@
 import unittest
 
 import numpy as np
+from test_imperative_base import new_program_scope
 from utils import DyGraphProgramDescTracerTestHelper
 
 import paddle
 import paddle.fluid as fluid
 from paddle.fluid import core
+from paddle.fluid.framework import _in_legacy_dygraph, _test_eager_guard
 from paddle.fluid.optimizer import SGDOptimizer
 from paddle.nn import Linear
-from test_imperative_base import new_program_scope
-from utils import DyGraphProgramDescTracerTestHelper
-from paddle.fluid.framework import _test_eager_guard, _in_legacy_dygraph
 
 
 class SimpleImgConvPool(fluid.dygraph.Layer):
diff --git a/python/paddle/fluid/tests/unittests/test_imperative_ocr_attention_model.py b/python/paddle/fluid/tests/unittests/test_imperative_ocr_attention_model.py
index 81eb24f98f8247c5c12f598e894c53cb2fdb4f8b..657774b7298a36f6e9597fe6c36f0725a7fd0581 100644
--- a/python/paddle/fluid/tests/unittests/test_imperative_ocr_attention_model.py
+++ b/python/paddle/fluid/tests/unittests/test_imperative_ocr_attention_model.py
@@ -21,14 +21,9 @@ import paddle
 import paddle.fluid as fluid
 from paddle.fluid import core
 from paddle.fluid.dygraph.base import to_variable
-from paddle.fluid.dygraph.nn import (
-    BatchNorm,
-    Embedding,
-    GRUUnit,
-    Linear,
-)
-from paddle.nn import Linear
+from paddle.fluid.dygraph.nn import BatchNorm, Embedding, GRUUnit, Linear
 from paddle.fluid.framework import _test_eager_guard
+from paddle.nn import Linear
 
 
 class Config:
diff --git a/python/paddle/fluid/tests/unittests/test_imperative_optimizer.py b/python/paddle/fluid/tests/unittests/test_imperative_optimizer.py
index 1650532e49d7a98da6b302543671172de3f69258..71eb99c229369cfa860b84d39e27535ae44fd7fa 100644
--- a/python/paddle/fluid/tests/unittests/test_imperative_optimizer.py
+++ b/python/paddle/fluid/tests/unittests/test_imperative_optimizer.py
@@ -16,10 +16,13 @@ import itertools
 import unittest
 
 import numpy as np
+from test_imperative_base import new_program_scope
 
 import paddle
 import paddle.fluid as fluid
+from paddle.distributed.fleet.meta_optimizers import DGCMomentumOptimizer
 from paddle.fluid import core
+from paddle.fluid.framework import _test_eager_guard
 from paddle.fluid.optimizer import (
     AdadeltaOptimizer,
     AdagradOptimizer,
@@ -39,10 +42,6 @@ from paddle.fluid.optimizer import (
     RMSPropOptimizer,
     SGDOptimizer,
 )
-from test_imperative_base import new_program_scope
-from paddle.fluid.framework import _test_eager_guard
-
-from paddle.distributed.fleet.meta_optimizers import DGCMomentumOptimizer
 
 # Note(wangzhongpu)
 # In dygraph, don't support ModelAverage, DGCMomentumOptimizer, ExponentialMovingAverage, PipelineOptimizer, LookaheadOptimizer, RecomputeOptimizer.
diff --git a/python/paddle/fluid/tests/unittests/test_imperative_optimizer_v2.py b/python/paddle/fluid/tests/unittests/test_imperative_optimizer_v2.py
index 48ee814b4ddc9196d2cf89a1f0f22c7efee90be3..27c50d2e8af4ea1dcd3bf8ff2809336e869d9191 100644
--- a/python/paddle/fluid/tests/unittests/test_imperative_optimizer_v2.py
+++ b/python/paddle/fluid/tests/unittests/test_imperative_optimizer_v2.py
@@ -16,10 +16,13 @@ import itertools
 import unittest
 
 import numpy as np
+from test_imperative_base import new_program_scope
 
 import paddle
 import paddle.fluid as fluid
+from paddle.distributed.fleet.meta_optimizers import DGCMomentumOptimizer
 from paddle.fluid import core
+from paddle.fluid.framework import _test_eager_guard
 from paddle.fluid.optimizer import (
     AdadeltaOptimizer,
     AdagradOptimizer,
@@ -36,10 +39,6 @@ from paddle.fluid.optimizer import (
     RecomputeOptimizer,
     RMSPropOptimizer,
 )
-from test_imperative_base import new_program_scope
-from paddle.fluid.framework import _test_eager_guard
-
-from paddle.distributed.fleet.meta_optimizers import DGCMomentumOptimizer
 
 # Note(wangzhongpu)
 # In dygraph, don't support ModelAverage, DGCMomentumOptimizer, ExponentialMovingAverage, PipelineOptimizer, LookaheadOptimizer, RecomputeOptimizer.
diff --git a/python/paddle/fluid/tests/unittests/test_imperative_partitial_backward.py b/python/paddle/fluid/tests/unittests/test_imperative_partitial_backward.py
index 29d42076e2c73956113d6d8b3d335023cc3230f2..67f5a7d26b5085a90473f000132fa7c24b35596d 100644
--- a/python/paddle/fluid/tests/unittests/test_imperative_partitial_backward.py
+++ b/python/paddle/fluid/tests/unittests/test_imperative_partitial_backward.py
@@ -16,9 +16,9 @@ import unittest
 
 import numpy as np
 
+import paddle
 import paddle.fluid as fluid
 from paddle.fluid.framework import _test_eager_guard
-import paddle
 
 
 class TestImperativePartitialBackward(unittest.TestCase):
diff --git a/python/paddle/fluid/tests/unittests/test_imperative_reinforcement.py b/python/paddle/fluid/tests/unittests/test_imperative_reinforcement.py
index 2a2d2ef905331730d63fb821226f218de206d488..2cc85fbc30f0d8858d62be7e27d4d7c84aab3a49 100644
--- a/python/paddle/fluid/tests/unittests/test_imperative_reinforcement.py
+++ b/python/paddle/fluid/tests/unittests/test_imperative_reinforcement.py
@@ -15,11 +15,11 @@
 import unittest
 
 import numpy as np
+from test_imperative_base import new_program_scope
 
 import paddle
 import paddle.fluid as fluid
 from paddle.fluid import core
-from test_imperative_base import new_program_scope
 from paddle.fluid.framework import _test_eager_guard
 from paddle.fluid.optimizer import SGDOptimizer
 
diff --git a/python/paddle/fluid/tests/unittests/test_imperative_resnet.py b/python/paddle/fluid/tests/unittests/test_imperative_resnet.py
index 6c3fdf77a2d1c739475d428ea132472db41ec05c..53e8b1d93c4b7a37f553ed8a273b49614cbbd710 100644
--- a/python/paddle/fluid/tests/unittests/test_imperative_resnet.py
+++ b/python/paddle/fluid/tests/unittests/test_imperative_resnet.py
@@ -20,8 +20,7 @@ from utils import DyGraphProgramDescTracerTestHelper, is_equal_program
 
 import paddle
 import paddle.fluid as fluid
-from paddle.fluid import core
-from paddle.fluid import BatchNorm
+from paddle.fluid import BatchNorm, core
 from paddle.fluid.dygraph.base import to_variable
 from paddle.fluid.framework import _in_legacy_dygraph, _test_eager_guard
 from paddle.fluid.layer_helper import LayerHelper
diff --git a/python/paddle/fluid/tests/unittests/test_imperative_se_resnext.py b/python/paddle/fluid/tests/unittests/test_imperative_se_resnext.py
index 265f3720680088cce378c6593d159b12943c474b..c09f6a1449faa861a27fd01f2d16d825b4abdd5e 100644
--- a/python/paddle/fluid/tests/unittests/test_imperative_se_resnext.py
+++ b/python/paddle/fluid/tests/unittests/test_imperative_se_resnext.py
@@ -21,7 +21,6 @@ import paddle
 import paddle.fluid as fluid
 from paddle.fluid import core
 from paddle.fluid.dygraph.nn import BatchNorm
-from test_imperative_base import new_program_scope
 from paddle.fluid.framework import _test_eager_guard
 from paddle.fluid.layer_helper import LayerHelper
 
diff --git a/python/paddle/fluid/tests/unittests/test_imperative_trace_non_persistable_inputs.py b/python/paddle/fluid/tests/unittests/test_imperative_trace_non_persistable_inputs.py
index 959ed8bbfec38c1ceb0c4d3c1cf1d4dc6e9d4cf2..341aa800c962626eda0fa4b2d8a0b14f08b470e9 100644
--- a/python/paddle/fluid/tests/unittests/test_imperative_trace_non_persistable_inputs.py
+++ b/python/paddle/fluid/tests/unittests/test_imperative_trace_non_persistable_inputs.py
@@ -16,7 +16,7 @@ import os
 import unittest
 
 import numpy as np
-import os
+
 import paddle
 import paddle.fluid as fluid
 
diff --git a/python/paddle/fluid/tests/unittests/test_imperative_transformer_sorted_gradient.py b/python/paddle/fluid/tests/unittests/test_imperative_transformer_sorted_gradient.py
index f5737956c3b600a05114f92b8a4844d6e1d27360..654ebf198b7d09a0422c78f3b99b4290953bec1b 100644
--- a/python/paddle/fluid/tests/unittests/test_imperative_transformer_sorted_gradient.py
+++ b/python/paddle/fluid/tests/unittests/test_imperative_transformer_sorted_gradient.py
@@ -19,15 +19,12 @@ from test_imperative_base import new_program_scope
 
 import paddle
 import paddle.fluid as fluid
-from paddle.fluid import Embedding, LayerNorm, Layer
-from paddle.nn import Linear
-from paddle.fluid.dygraph import to_variable, guard
-from test_imperative_base import new_program_scope
-from paddle.fluid.framework import _in_legacy_dygraph, _test_eager_guard
-from paddle.fluid import core
-import numpy as np
 import paddle.nn.functional as F
+from paddle.fluid import Embedding, Layer, LayerNorm, core
+from paddle.fluid.dygraph import guard, to_variable
+from paddle.fluid.framework import _in_legacy_dygraph, _test_eager_guard
 from paddle.jit import TracedLayer
+from paddle.nn import Linear
 
 np.set_printoptions(suppress=True)
 
diff --git a/python/paddle/fluid/tests/unittests/test_isfinite_op.py b/python/paddle/fluid/tests/unittests/test_isfinite_op.py
index 1ec8063bf57282cfe411b263891a355989e994b6..053e9bbc08f571348da93f1ca3323739e3dd3451 100644
--- a/python/paddle/fluid/tests/unittests/test_isfinite_op.py
+++ b/python/paddle/fluid/tests/unittests/test_isfinite_op.py
@@ -16,6 +16,7 @@ import unittest
 
 import numpy as np
 from op_test import OpTest
+
 import paddle.fluid.core as core
 
 
diff --git a/python/paddle/fluid/tests/unittests/test_jit_save_load.py b/python/paddle/fluid/tests/unittests/test_jit_save_load.py
index eac870650489549ba920d217919850f1dac23f87..acb8d0859835f5673b5e66c13adf9b045593587b 100644
--- a/python/paddle/fluid/tests/unittests/test_jit_save_load.py
+++ b/python/paddle/fluid/tests/unittests/test_jit_save_load.py
@@ -23,11 +23,11 @@ import numpy as np
 
 import paddle
 import paddle.fluid as fluid
-from paddle.nn import Linear
 from paddle.fluid import unique_name
 from paddle.fluid.dygraph.io import INFER_PARAMS_INFO_SUFFIX
 from paddle.fluid.layers.utils import flatten
 from paddle.jit.api import declarative
+from paddle.nn import Linear
 from paddle.static import InputSpec
 
 BATCH_SIZE = 32
diff --git a/python/paddle/fluid/tests/unittests/test_learning_rate_scheduler.py b/python/paddle/fluid/tests/unittests/test_learning_rate_scheduler.py
index dd37c2bff66a7a67cb27094ea0641ef465ae8be0..a31809c0974bb2353f9dbddd8df4505fa6124558 100644
--- a/python/paddle/fluid/tests/unittests/test_learning_rate_scheduler.py
+++ b/python/paddle/fluid/tests/unittests/test_learning_rate_scheduler.py
@@ -14,13 +14,15 @@
 
 import copy
 import math
-import numpy as np
 import unittest
+
+import numpy as np
+
 import paddle
 import paddle.fluid as fluid
-import paddle.fluid.layers as layers
-import paddle.fluid.framework as framework
 import paddle.fluid.core as core
+import paddle.fluid.framework as framework
+import paddle.fluid.layers as layers
 
 
 def exponential_decay(
diff --git a/python/paddle/fluid/tests/unittests/test_multiprocess_dataloader_dynamic.py b/python/paddle/fluid/tests/unittests/test_multiprocess_dataloader_dynamic.py
index 2ea1b4faf8d24a2e5efd2b2a6276bf638972aa9c..8bcde4489e42542ecca9cf40d7fea23da0c35062 100644
--- a/python/paddle/fluid/tests/unittests/test_multiprocess_dataloader_dynamic.py
+++ b/python/paddle/fluid/tests/unittests/test_multiprocess_dataloader_dynamic.py
@@ -15,9 +15,6 @@
 import sys
 import time
 import unittest
-import numpy as np
-import paddle
-from paddle.nn import Linear
 
 import numpy as np
 from test_multiprocess_dataloader_static import (
@@ -31,8 +28,10 @@ from test_multiprocess_dataloader_static import (
     prepare_places,
 )
 
+import paddle
 import paddle.fluid as fluid
 from paddle.io import DataLoader
+from paddle.nn import Linear
 
 
 class SimpleFCNet(fluid.dygraph.Layer):
diff --git a/python/paddle/fluid/tests/unittests/test_multiprocess_dataloader_iterable_dataset_dynamic.py b/python/paddle/fluid/tests/unittests/test_multiprocess_dataloader_iterable_dataset_dynamic.py
index 1f15241b26c6a03a993b75bb3ad7b3c70d0f4bbd..e739c0c2cb755d908d620a122f7f883b1ba52a32 100644
--- a/python/paddle/fluid/tests/unittests/test_multiprocess_dataloader_iterable_dataset_dynamic.py
+++ b/python/paddle/fluid/tests/unittests/test_multiprocess_dataloader_iterable_dataset_dynamic.py
@@ -15,10 +15,6 @@
 import sys
 import time
 import unittest
-import numpy as np
-
-import paddle
-from paddle.nn import Linear
 
 import numpy as np
 from test_multiprocess_dataloader_iterable_dataset_static import (
@@ -32,8 +28,10 @@ from test_multiprocess_dataloader_iterable_dataset_static import (
     prepare_places,
 )
 
+import paddle
 import paddle.fluid as fluid
 from paddle.io import DataLoader
+from paddle.nn import Linear
 
 
 class SimpleFCNet(fluid.dygraph.Layer):
diff --git a/python/paddle/fluid/tests/unittests/test_ones_op.py b/python/paddle/fluid/tests/unittests/test_ones_op.py
index 6b2bbd3786522f9392db15ba2877cf642e4cf186..02e349e0c30203f7c270f126f3a4489ee390572e 100644
--- a/python/paddle/fluid/tests/unittests/test_ones_op.py
+++ b/python/paddle/fluid/tests/unittests/test_ones_op.py
@@ -17,7 +17,6 @@ import unittest
 import numpy as np
 
 import paddle
-import numpy as np
 
 
 class ApiOnesTest(unittest.TestCase):
diff --git a/python/paddle/fluid/tests/unittests/test_paddle_save_load.py b/python/paddle/fluid/tests/unittests/test_paddle_save_load.py
index ed9ffcaab9da999e385270fe636047d11097136a..c78fa2ed847b415e136314efba41eb1159c0d591 100644
--- a/python/paddle/fluid/tests/unittests/test_paddle_save_load.py
+++ b/python/paddle/fluid/tests/unittests/test_paddle_save_load.py
@@ -12,19 +12,20 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import unittest
-import numpy as np
 import os
-from io import BytesIO
 import tempfile
+import unittest
+from io import BytesIO
+
+import numpy as np
+from test_imperative_base import new_program_scope
 
 import paddle
+import paddle.fluid as fluid
+import paddle.fluid.framework as framework
 import paddle.nn as nn
 import paddle.optimizer as opt
-import paddle.fluid as fluid
 from paddle.fluid.optimizer import Adam
-import paddle.fluid.framework as framework
-from test_imperative_base import new_program_scope
 from paddle.optimizer.lr import LRScheduler
 
 BATCH_SIZE = 16
diff --git a/python/paddle/fluid/tests/unittests/test_pool3d_op.py b/python/paddle/fluid/tests/unittests/test_pool3d_op.py
index 0c62aeb257ad36665eab0f6c688dbfe95363dc69..7204c0c49389ae5a145541e61a88052be100303a 100644
--- a/python/paddle/fluid/tests/unittests/test_pool3d_op.py
+++ b/python/paddle/fluid/tests/unittests/test_pool3d_op.py
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 import unittest
+
 import numpy as np
+from op_test import OpTest
 
 import paddle
 import paddle.fluid.core as core
-from op_test import OpTest
 
 
 def adaptive_start_index(index, input_size, output_size):
diff --git a/python/paddle/fluid/tests/unittests/test_roi_pool_op.py b/python/paddle/fluid/tests/unittests/test_roi_pool_op.py
index b84cca41bbd29452a40a735012d933ea3f03eac0..6ae113fa8a1ca737590a70275173e5796bb39882 100644
--- a/python/paddle/fluid/tests/unittests/test_roi_pool_op.py
+++ b/python/paddle/fluid/tests/unittests/test_roi_pool_op.py
@@ -12,14 +12,15 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import paddle
-import unittest
-import numpy as np
 import math
 import sys
+import unittest
+from decimal import ROUND_HALF_UP, Decimal
+
+import numpy as np
 from op_test import OpTest
 
-from decimal import Decimal, ROUND_HALF_UP
+import paddle
 
 
 def _round(x):
diff --git a/python/paddle/fluid/tests/unittests/test_sigmoid_cross_entropy_with_logits_op.py b/python/paddle/fluid/tests/unittests/test_sigmoid_cross_entropy_with_logits_op.py
index aa0e0e36ff613449bedd6462902ef1f8a4d1e075..ce18a4647966d37eb7953742d48581d8d1afe2f6 100644
--- a/python/paddle/fluid/tests/unittests/test_sigmoid_cross_entropy_with_logits_op.py
+++ b/python/paddle/fluid/tests/unittests/test_sigmoid_cross_entropy_with_logits_op.py
@@ -12,14 +12,15 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+import unittest
+
 import numpy as np
 from op_test import OpTest
-from scipy.special import logit
-from scipy.special import expit
-import unittest
-from paddle.fluid import Program, program_guard
-import paddle.fluid as fluid
+from scipy.special import expit, logit
+
 import paddle
+import paddle.fluid as fluid
+from paddle.fluid import Program, program_guard
 
 
 class TestSigmoidCrossEntropyWithLogitsOp1(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_similarity_focus_op.py b/python/paddle/fluid/tests/unittests/test_similarity_focus_op.py
index 6b92a3253b51b3c8dd310149cf093aa7fc73e087..1227a48949341439fde0bdff4906ffb7823761aa 100755
--- a/python/paddle/fluid/tests/unittests/test_similarity_focus_op.py
+++ b/python/paddle/fluid/tests/unittests/test_similarity_focus_op.py
@@ -13,6 +13,7 @@
 # limitations under the License.
 
 import unittest
+
 import numpy as np
 from op_test import OpTest
 
diff --git a/python/paddle/fluid/tests/unittests/test_size_op.py b/python/paddle/fluid/tests/unittests/test_size_op.py
index ac070c099e63c02642b135447890068fadc33ca1..b3ae19b8ef20eb5528b81dbc478cc564c1e87e0c 100644
--- a/python/paddle/fluid/tests/unittests/test_size_op.py
+++ b/python/paddle/fluid/tests/unittests/test_size_op.py
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 import unittest
+
 import numpy as np
-import paddle
-import paddle.fluid as fluid
 from op_test import OpTest
+
 import paddle
+import paddle.fluid as fluid
 
 
 class TestSizeOp(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_static_save_load.py b/python/paddle/fluid/tests/unittests/test_static_save_load.py
index c0472b16515a01cd86392a391311f1976d203599..8871966d350aa71c81f181ac2c4dca20f85f7dc9 100644
--- a/python/paddle/fluid/tests/unittests/test_static_save_load.py
+++ b/python/paddle/fluid/tests/unittests/test_static_save_load.py
@@ -13,18 +13,20 @@
 # limitations under the License.
 
 
+import errno
+import os
+import pickle
+import tempfile
 import unittest
+
+import numpy as np
+from test_imperative_base import new_program_scope
+
 import paddle
 import paddle.fluid as fluid
 import paddle.fluid.core as core
 import paddle.fluid.framework as framework
 from paddle.fluid.optimizer import Adam
-from test_imperative_base import new_program_scope
-import numpy as np
-import pickle
-import os
-import errno
-import tempfile
 
 paddle.enable_static()
 
diff --git a/python/paddle/fluid/tests/unittests/utils.py b/python/paddle/fluid/tests/unittests/utils.py
index 04c3085c3dffc105e982856ecd382c5c520e4d99..a9cbc845c2dfb3e970d5f85b0d3860222caf4d3c 100644
--- a/python/paddle/fluid/tests/unittests/utils.py
+++ b/python/paddle/fluid/tests/unittests/utils.py
@@ -12,10 +12,11 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from paddle.fluid.framework import _dygraph_guard
-import paddle.fluid as fluid
 import numpy as np
 
+import paddle.fluid as fluid
+from paddle.fluid.framework import _dygraph_guard
+
 __all__ = ['DyGraphProgramDescTracerTestHelper', 'is_equal_program']
 
 
diff --git a/python/paddle/fluid/tests/unittests/xpu/test_affine_channel_op_xpu.py b/python/paddle/fluid/tests/unittests/xpu/test_affine_channel_op_xpu.py
index fc3c9612ead016f84e935d55ad63da1ee3b2785a..13255906925655ac190ecf585ed8990c82de055b 100644
--- a/python/paddle/fluid/tests/unittests/xpu/test_affine_channel_op_xpu.py
+++ b/python/paddle/fluid/tests/unittests/xpu/test_affine_channel_op_xpu.py
@@ -20,8 +20,10 @@ import sys
 sys.path.append("..")
 
 import unittest
+
 import numpy as np
 from op_test_xpu import XPUOpTest
+
 import paddle
 import paddle.fluid.core as core
 
diff --git a/python/paddle/hapi/progressbar.py b/python/paddle/hapi/progressbar.py
index 0f6f375b2a38be2497627faa849531e5e3eae93e..6c33d4962e79cbc51eb9af71f775232dcba48de8 100644
--- a/python/paddle/hapi/progressbar.py
+++ b/python/paddle/hapi/progressbar.py
@@ -13,10 +13,11 @@
 # limitations under the License.
 
 import os
+import struct
 import sys
 import time
+
 import numpy as np
-import struct
 
 __all__ = []
 
diff --git a/python/paddle/incubate/multiprocessing/reductions.py b/python/paddle/incubate/multiprocessing/reductions.py
index 04fe123fdc1930af38d0d77530f62385aa98baaf..5bc1e2118621211af51b949b64620a1da167b8ae 100644
--- a/python/paddle/incubate/multiprocessing/reductions.py
+++ b/python/paddle/incubate/multiprocessing/reductions.py
@@ -12,18 +12,18 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import paddle
+import copy
 
 # TODO: check the hooks of tensor
 # TODO: check serializing named tensor
 # TODO: check influence on autograd
 import sys
-import copy
 import threading
-from multiprocessing.util import register_after_fork
+from collections import OrderedDict
 from multiprocessing.reduction import ForkingPickler
+from multiprocessing.util import register_after_fork
 
-from collections import OrderedDict
+import paddle
 
 
 def _supported_check():
diff --git a/python/paddle/inference/wrapper.py b/python/paddle/inference/wrapper.py
index c69cfa06f3982e117cd67303b40994e7b52b166e..ab532dc32266dcfa9c7d92d9bdb2d00891f888df 100644
--- a/python/paddle/inference/wrapper.py
+++ b/python/paddle/inference/wrapper.py
@@ -12,15 +12,21 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import paddle.fluid.core as core
-from paddle.fluid.core import AnalysisConfig, PaddleDType, PaddlePlace
-from paddle.fluid.core import PaddleInferPredictor, PaddleInferTensor
-from paddle.fluid.core import convert_to_mixed_precision_bind
-
 import os
-import numpy as np
 from typing import Set
 
+import numpy as np
+
+import paddle.fluid.core as core
+from paddle.fluid.core import (
+    AnalysisConfig,
+    PaddleDType,
+    PaddleInferPredictor,
+    PaddleInferTensor,
+    PaddlePlace,
+    convert_to_mixed_precision_bind,
+)
+
 DataType = PaddleDType
 PlaceType = PaddlePlace
 PrecisionType = AnalysisConfig.Precision
diff --git a/python/paddle/static/nn/common.py b/python/paddle/static/nn/common.py
index d70d958016ab4e38efd12b0767634bb5106e9da6..9fc2bbd975d5fb63901688bf65c26aacb2f8c8ee 100755
--- a/python/paddle/static/nn/common.py
+++ b/python/paddle/static/nn/common.py
@@ -13,19 +13,17 @@
 # limitations under the License.
 
 import paddle
-from paddle.fluid.param_attr import ParamAttr
-from paddle.fluid.initializer import Normal, Constant
-from paddle.fluid.framework import static_only, Variable, _non_static_mode
-from paddle.fluid.layers.layer_function_generator import templatedoc
-
-from paddle.fluid.data_feeder import check_dtype
-
 from paddle.common_ops_import import (
+    LayerHelper,
     check_type,
     check_variable_and_dtype,
     utils,
-    LayerHelper,
 )
+from paddle.fluid.data_feeder import check_dtype
+from paddle.fluid.framework import Variable, _non_static_mode, static_only
+from paddle.fluid.initializer import Constant, Normal
+from paddle.fluid.layers.layer_function_generator import templatedoc
+from paddle.fluid.param_attr import ParamAttr
 
 __all__ = []
 
diff --git a/python/paddle/vision/datasets/folder.py b/python/paddle/vision/datasets/folder.py
index 96a5b9b200eea988f5784d252b41f3a3f4891a74..650114cd19da3edd0e8e1e5bf8ce5a35c53953b9 100644
--- a/python/paddle/vision/datasets/folder.py
+++ b/python/paddle/vision/datasets/folder.py
@@ -13,6 +13,7 @@
 # limitations under the License.
 
 import os
+
 from PIL import Image
 
 import paddle