diff --git a/python/paddle/common_ops_import.py b/python/paddle/common_ops_import.py
index 7169671ad3c246b4560e6e1878e6a33e5f1cdc53..1c2bb424dc18b85528888e3673a4865a3b846e7c 100644
--- a/python/paddle/common_ops_import.py
+++ b/python/paddle/common_ops_import.py
@@ -11,31 +11,32 @@
 # 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 paddle.fluid.layer_helper import LayerHelper  # noqa: F401
-from paddle.fluid.param_attr import ParamAttr  # noqa: F401
+import paddle.fluid as fluid  # noqa: F401
+from paddle.fluid import core, dygraph_utils  # noqa: F401
+from paddle.fluid.core import VarDesc  # noqa: F401
+from paddle.fluid.data_feeder import (  # noqa: F401
+    check_dtype,
+    check_type,
+    check_variable_and_dtype,
+    convert_dtype,
+)
 from paddle.fluid.framework import (  # noqa: F401
-    convert_np_dtype_to_dtype_,
+    OpProtoHolder,
+    Variable,
+    _dygraph_tracer,
+    _in_legacy_dygraph,
     _non_static_mode,
     _varbase_creator,
-    in_dygraph_mode,
-    _in_legacy_dygraph,
-)
-from paddle.fluid.framework import (  # noqa: F401
-    device_guard,
+    convert_np_dtype_to_dtype_,
     default_main_program,
+    device_guard,
     dygraph_only,
-    _dygraph_tracer,
+    in_dygraph_mode,
 )
-from paddle.fluid.framework import OpProtoHolder, Variable  # noqa: F401
 from paddle.fluid.initializer import Constant  # noqa: F401
-from paddle.fluid.core import VarDesc  # noqa: F401
-from paddle.fluid import core, dygraph_utils  # noqa: F401
-from paddle.fluid.data_feeder import (  # noqa: F401
-    check_type,
-    check_dtype,
-    check_variable_and_dtype,
-    convert_dtype,
-)
+from paddle.fluid.layer_helper import LayerHelper  # noqa: F401
 from paddle.fluid.layers import fill_constant, utils  # noqa: F401
-from paddle.tensor.layer_function_generator import templatedoc  # noqa: F401
-import paddle.fluid as fluid  # noqa: F401
+from paddle.fluid.layers.layer_function_generator import (  # noqa: F401
+    templatedoc,
+)
+from paddle.fluid.param_attr import ParamAttr  # noqa: F401
diff --git a/python/paddle/tensor/array.py b/python/paddle/tensor/array.py
index 382c6f524b4c57acfa27960189c3479cf449aca5..8a70e2dd11a17039f48af7be54f790a1ed0adc32 100644
--- a/python/paddle/tensor/array.py
+++ b/python/paddle/tensor/array.py
@@ -14,10 +14,9 @@
 
 # Define functions about array.
 
+from ..fluid.data_feeder import check_type, check_variable_and_dtype
+from ..framework import LayerHelper, _non_static_mode, core
 from ..static import Variable
-from ..framework import LayerHelper, core, _non_static_mode
-from ..fluid.data_feeder import check_type
-from ..fluid.data_feeder import check_variable_and_dtype
 
 __all__ = []
 
diff --git a/python/paddle/tensor/attribute.py b/python/paddle/tensor/attribute.py
index e0db6a6e8b413f4173cc37c992e8078a2fc6b165..d6f08f676b8ae2b23dbb249293af34dffac37ec2 100644
--- a/python/paddle/tensor/attribute.py
+++ b/python/paddle/tensor/attribute.py
@@ -12,21 +12,18 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from ..framework import core
-from ..framework import LayerHelper
-from ..fluid.data_feeder import check_variable_and_dtype
-from ..fluid.data_feeder import check_type
+# TODO: define functions to get tensor attributes
 
-from .creation import assign
-from .creation import _complex_to_real_dtype
+import numpy as np
 
-# TODO: define functions to get tensor attributes
 import paddle
 from paddle import _C_ops, _legacy_C_ops
-from ..static import Variable
-from ..fluid.framework import _in_legacy_dygraph, in_dygraph_mode
 
-import numpy as np
+from ..fluid.data_feeder import check_type, check_variable_and_dtype
+from ..fluid.framework import _in_legacy_dygraph, in_dygraph_mode
+from ..framework import LayerHelper, core
+from ..static import Variable
+from .creation import _complex_to_real_dtype, assign
 
 __all__ = []
 
diff --git a/python/paddle/tensor/creation.py b/python/paddle/tensor/creation.py
index ddde2a68988b9e42420f43df4f55e7a91f8fb56e..e44582c0f3a11b009c56688b52a5e61733767f57 100644
--- a/python/paddle/tensor/creation.py
+++ b/python/paddle/tensor/creation.py
@@ -12,32 +12,39 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import numpy as np
+# TODO: define functions to get create a tensor
+
 import math
 import re
+import warnings
+
+import numpy as np
+
+import paddle
+from paddle import _C_ops, _legacy_C_ops
 from paddle.common_ops_import import fill_constant
-from ..fluid.layers import utils
-from ..static import Variable, device_guard
-from ..framework import _current_expected_place, _get_paddle_place
-from ..framework import core
-from ..framework import in_dygraph_mode, _non_static_mode
-from ..framework import LayerHelper
+
 from ..fluid.data_feeder import (
-    check_variable_and_dtype,
-    check_type,
     check_dtype,
+    check_type,
+    check_variable_and_dtype,
     convert_dtype,
 )
-from ..framework import convert_np_dtype_to_dtype_
-
-# TODO: define functions to get create a tensor
-import paddle
-from paddle import _C_ops, _legacy_C_ops
 from ..fluid.framework import (
-    _in_legacy_dygraph,
     _in_eager_without_dygraph_check,
+    _in_legacy_dygraph,
 )
-import warnings
+from ..fluid.layers import utils
+from ..framework import (
+    LayerHelper,
+    _current_expected_place,
+    _get_paddle_place,
+    _non_static_mode,
+    convert_np_dtype_to_dtype_,
+    core,
+    in_dygraph_mode,
+)
+from ..static import Variable, device_guard
 
 __all__ = []
 
diff --git a/python/paddle/tensor/einsum.py b/python/paddle/tensor/einsum.py
index 4864317254ddeb61efa1679d56e8ef17bfae68a2..50718b64409e9321b643e290ce2a6e9505f751da 100644
--- a/python/paddle/tensor/einsum.py
+++ b/python/paddle/tensor/einsum.py
@@ -12,22 +12,23 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+import collections
 import itertools
-import numpy as np
 import re
+import string
+
+import numpy as np
+import opt_einsum
 
-from .linalg import matmul, transpose
-from .manipulation import squeeze, unsqueeze, reshape
-from .math import multiply
-from .math import sum as paddle_sum
-from ..fluid.framework import _in_legacy_dygraph
 from paddle import _C_ops, _legacy_C_ops
+
 from ..fluid.data_feeder import check_type, check_variable_and_dtype
-from ..fluid.layer_helper import LayerHelper
 from ..fluid.framework import _in_legacy_dygraph, in_dygraph_mode
-import collections
-import string
-import opt_einsum
+from ..fluid.layer_helper import LayerHelper
+from .linalg import matmul, transpose
+from .manipulation import reshape, squeeze, unsqueeze
+from .math import multiply
+from .math import sum as paddle_sum
 
 __all__ = []
 
diff --git a/python/paddle/tensor/layer_function_generator.py b/python/paddle/tensor/layer_function_generator.py
index fb2a611257e13113bd8fedcabacf82405e4b12be..fed73aff93bab980cd2a7fbadf9b16f627c78d13 100644
--- a/python/paddle/tensor/layer_function_generator.py
+++ b/python/paddle/tensor/layer_function_generator.py
@@ -13,22 +13,23 @@
 # limitations under the License.
 
 import re
-import warnings
 import string
-
+import warnings
 from io import StringIO
-from ..static import Variable
+
+from paddle import _C_ops, _legacy_C_ops
+
+from ..fluid.data_feeder import check_variable_and_dtype
 from ..fluid.proto import framework_pb2
 from ..framework import (
+    LayerHelper,
     OpProtoHolder,
     _non_static_mode,
     convert_np_dtype_to_dtype_,
     core,
     in_dygraph_mode,
 )
-from ..framework import LayerHelper
-from ..fluid.data_feeder import check_variable_and_dtype
-from paddle import _C_ops, _legacy_C_ops
+from ..static import Variable
 
 __all__ = []
 
diff --git a/python/paddle/tensor/linalg.py b/python/paddle/tensor/linalg.py
index d7dcd5412ac38114f07274b6ea94b77c69b970b9..0ffae882ee5f219028efcb9a47e140c9e2da603d 100644
--- a/python/paddle/tensor/linalg.py
+++ b/python/paddle/tensor/linalg.py
@@ -13,23 +13,23 @@
 # limitations under the License.
 
 import numpy as np
-from ..framework import LayerHelper
-from ..framework import _non_static_mode, in_dygraph_mode
+
+import paddle
+from paddle import _C_ops, _legacy_C_ops
+from paddle.common_ops_import import VarDesc
+
 from ..fluid.data_feeder import (
-    check_variable_and_dtype,
-    check_type,
     check_dtype,
+    check_type,
+    check_variable_and_dtype,
 )
-from ..static import Variable
 from ..fluid.framework import _in_legacy_dygraph
-from .manipulation import cast
-from .math import multiply, add
-from .logic import logical_not
+from ..framework import LayerHelper, _non_static_mode, in_dygraph_mode
+from ..static import Variable
 from .creation import full
-
-import paddle
-from paddle.common_ops_import import VarDesc
-from paddle import _C_ops, _legacy_C_ops
+from .logic import logical_not
+from .manipulation import cast
+from .math import add, multiply
 
 __all__ = []
 
diff --git a/python/paddle/tensor/logic.py b/python/paddle/tensor/logic.py
index 912c69245c0df8c2a07228e084850ec4bd4a8437..a4cc95edfc7c35dc7d8fbb7145256341d2582f26 100755
--- a/python/paddle/tensor/logic.py
+++ b/python/paddle/tensor/logic.py
@@ -12,27 +12,26 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+# TODO: define logic functions of a tensor
+
 import paddle
-from ..fluid.data_feeder import check_type, check_variable_and_dtype
-from .layer_function_generator import templatedoc
-from ..static import Variable
 
-# TODO: define logic functions of a tensor
+from ..fluid.data_feeder import check_type, check_variable_and_dtype
 from ..fluid.framework import _in_eager_mode_
+from ..static import Variable
+from .layer_function_generator import templatedoc
 
 if _in_eager_mode_:
     Tensor = paddle.fluid.framework.core.eager.Tensor
 else:
     from ..framework import VarBase as Tensor
 
-from ..framework import in_dygraph_mode
-from ..framework import LayerHelper
-from ..fluid.framework import _in_legacy_dygraph
-
-# TODO: define logic functions of a tensor
 from paddle import _C_ops, _legacy_C_ops
 from paddle.tensor.creation import full
 
+from ..fluid.framework import _in_legacy_dygraph
+from ..framework import LayerHelper, in_dygraph_mode
+
 __all__ = []
 
 
diff --git a/python/paddle/tensor/manipulation.py b/python/paddle/tensor/manipulation.py
index c1307e218a7a2bbf68bf54941b9c5d959ce8ec6f..cb4fec4a33bd97c692b87da984680e20a340da41 100644
--- a/python/paddle/tensor/manipulation.py
+++ b/python/paddle/tensor/manipulation.py
@@ -12,31 +12,35 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+# TODO: define functions to manipulate a tensor
+
+import warnings
 from collections import Counter
 
-from ..static import Variable
-from ..framework import core, in_dygraph_mode
-from ..fluid.framework import _in_legacy_dygraph, _non_static_mode
-from ..framework import LayerHelper
-from ..framework import convert_np_dtype_to_dtype_, dygraph_only
-from ..fluid.data_feeder import (
-    convert_dtype,
-    check_variable_and_dtype,
-    check_type,
-    check_dtype,
-)
-from ..fluid.layers import utils
 import numpy as np
 
-# TODO: define functions to manipulate a tensor
-from ..fluid.dygraph.inplace_utils import inplace_apis_in_dygraph_only
 import paddle
 from paddle import _C_ops, _legacy_C_ops
-from ..common_ops_import import dygraph_utils, fill_constant, _varbase_creator
-import warnings
-from .creation import zeros
-from .creation import _complex_to_real_dtype
-from .creation import _real_to_complex_dtype
+
+from ..common_ops_import import _varbase_creator, dygraph_utils, fill_constant
+from ..fluid.data_feeder import (
+    check_dtype,
+    check_type,
+    check_variable_and_dtype,
+    convert_dtype,
+)
+from ..fluid.dygraph.inplace_utils import inplace_apis_in_dygraph_only
+from ..fluid.framework import _in_legacy_dygraph, _non_static_mode
+from ..fluid.layers import utils
+from ..framework import (
+    LayerHelper,
+    convert_np_dtype_to_dtype_,
+    core,
+    dygraph_only,
+    in_dygraph_mode,
+)
+from ..static import Variable
+from .creation import _complex_to_real_dtype, _real_to_complex_dtype, zeros
 
 __all__ = []
 
diff --git a/python/paddle/tensor/math.py b/python/paddle/tensor/math.py
index 5a49c659952da84a15538ce5f88410fa1eda2679..40dd2291e4c0a6a9a982308ca393cee97575fb95 100644
--- a/python/paddle/tensor/math.py
+++ b/python/paddle/tensor/math.py
@@ -14,47 +14,49 @@
 """
 math functions
 """
-import numpy as np
 
-from paddle.common_ops_import import VarDesc
-from paddle.common_ops_import import dygraph_only
-from paddle.common_ops_import import templatedoc
-from paddle.common_ops_import import dygraph_utils
+# TODO: define math functions
 
-from .manipulation import cast
-from .creation import _complex_to_real_dtype
-from .layer_function_generator import generate_layer_fn
+import numpy as np
 
 import paddle
-from ..static import Variable
-from ..framework import (
-    core,
-    in_dygraph_mode,
-    _non_static_mode,
-    LayerHelper,
-    _in_legacy_dygraph,
-)
-from ..fluid.framework import _in_legacy_dygraph
-from ..framework import _varbase_creator, convert_np_dtype_to_dtype_
+from paddle import _C_ops, _legacy_C_ops
+from paddle.common_ops_import import VarDesc, dygraph_only, dygraph_utils
+
 from ..fluid.data_feeder import (
-    check_variable_and_dtype,
-    check_type,
     check_dtype,
+    check_type,
+    check_variable_and_dtype,
     convert_dtype,
 )
 from ..fluid.dygraph.inplace_utils import inplace_apis_in_dygraph_only
-from ..fluid.layers import utils
-
-# TODO: define math functions
+from ..fluid.framework import _in_legacy_dygraph
+from ..fluid.layers import elementwise_sub, utils
+from ..framework import (
+    LayerHelper,
+    _in_legacy_dygraph,
+    _non_static_mode,
+    _varbase_creator,
+    convert_np_dtype_to_dtype_,
+    core,
+    in_dygraph_mode,
+)
+from ..static import Variable
+from .creation import _complex_to_real_dtype
+from .layer_function_generator import generate_layer_fn, templatedoc
+from .manipulation import cast
 from .ops import abs  # noqa: F401
 from .ops import acos  # noqa: F401
+from .ops import acosh  # noqa: F401
 from .ops import asin  # noqa: F401
+from .ops import asinh  # noqa: F401
+from .ops import atan  # noqa: F401
+from .ops import atanh  # noqa: F401
 from .ops import ceil  # noqa: F401
 from .ops import ceil_  # noqa: F401
 from .ops import cos  # noqa: F401
-from .ops import tan  # noqa: F401
-from .ops import sinh  # noqa: F401
 from .ops import cosh  # noqa: F401
+from .ops import erf  # noqa: F401
 from .ops import exp  # noqa: F401
 from .ops import exp_  # noqa: F401
 from .ops import expm1  # noqa: F401
@@ -66,18 +68,12 @@ from .ops import round  # noqa: F401
 from .ops import round_  # noqa: F401
 from .ops import rsqrt  # noqa: F401
 from .ops import rsqrt_  # noqa: F401
-from .ops import square  # noqa: F401
-from .ops import atan  # noqa: F401
-from .ops import erf  # noqa: F401
+from .ops import sin  # noqa: F401
+from .ops import sinh  # noqa: F401
 from .ops import sqrt  # noqa: F401
 from .ops import sqrt_  # noqa: F401
-from .ops import sin  # noqa: F401
-from .ops import asinh  # noqa: F401
-from .ops import acosh  # noqa: F401
-from .ops import atanh  # noqa: F401
-
-from ..fluid.layers import elementwise_sub
-from paddle import _C_ops, _legacy_C_ops
+from .ops import square  # noqa: F401
+from .ops import tan  # noqa: F401
 
 __all__ = []
 
diff --git a/python/paddle/tensor/ops.py b/python/paddle/tensor/ops.py
index 2897f4fd85a1b21075b6ce682f0c0becf62d2692..1472105ec19a8ba2bce8032924be9cfc4cc31da8 100644
--- a/python/paddle/tensor/ops.py
+++ b/python/paddle/tensor/ops.py
@@ -12,16 +12,16 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from .. import _C_ops, _legacy_C_ops
+from ..fluid.data_feeder import check_variable_and_dtype
+from ..fluid.framework import _in_legacy_dygraph, in_dygraph_mode
+from ..framework import LayerHelper
 from .layer_function_generator import (
-    generate_layer_fn,
+    add_sample_code,
     generate_activation_fn,
     generate_inplace_fn,
-    add_sample_code,
+    generate_layer_fn,
 )
-from ..fluid.data_feeder import check_variable_and_dtype
-from ..fluid.framework import in_dygraph_mode, _in_legacy_dygraph
-from ..framework import LayerHelper
-from .. import _C_ops, _legacy_C_ops
 
 __deprecated_func_name__ = {
     'tanh_shrink': 'tanhshrink',
diff --git a/python/paddle/tensor/random.py b/python/paddle/tensor/random.py
index da7f8b6a28513d8e92fa06c878b8c789c07c5097..1b80c872faca521a833bda9b0012e8cba3b3ba62 100644
--- a/python/paddle/tensor/random.py
+++ b/python/paddle/tensor/random.py
@@ -14,23 +14,27 @@
 
 # TODO: define random functions
 
-from ..framework import core
-from ..framework import convert_np_dtype_to_dtype_, dygraph_only
-from ..framework import LayerHelper
+import paddle
+from paddle import _C_ops, _legacy_C_ops
+from paddle.fluid.framework import (
+    _current_expected_place,
+    _in_legacy_dygraph,
+    in_dygraph_mode,
+)
+from paddle.static import Variable
+
 from ..fluid.data_feeder import (
-    check_variable_and_dtype,
-    check_type,
     check_dtype,
     check_shape,
+    check_type,
+    check_variable_and_dtype,
 )
 from ..fluid.layers import utils
-import paddle
-from paddle import _C_ops, _legacy_C_ops
-from paddle.static import Variable
-from paddle.fluid.framework import (
-    in_dygraph_mode,
-    _in_legacy_dygraph,
-    _current_expected_place,
+from ..framework import (
+    LayerHelper,
+    convert_np_dtype_to_dtype_,
+    core,
+    dygraph_only,
 )
 
 __all__ = []
diff --git a/python/paddle/tensor/search.py b/python/paddle/tensor/search.py
index f8c6861d48c84fcabc2201fd0fb0bbde613dd51c..2beacff2a081a5b1ea466ef3b3f5d57f4ebc8a8b 100755
--- a/python/paddle/tensor/search.py
+++ b/python/paddle/tensor/search.py
@@ -11,17 +11,25 @@
 # 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.
+
+# TODO: define searching & indexing functions of a tensor
+
 import numpy as np
+
 import paddle
-from ..framework import LayerHelper, convert_np_dtype_to_dtype_
+from paddle import _C_ops, _legacy_C_ops
+from paddle.common_ops_import import VarDesc, Variable
+
 from ..fluid.data_feeder import check_dtype, check_variable_and_dtype
-from ..framework import core, in_dygraph_mode, _non_static_mode
 from ..fluid.framework import _in_legacy_dygraph
-from paddle.common_ops_import import Variable
-from paddle.common_ops_import import VarDesc
-from paddle import _C_ops, _legacy_C_ops
+from ..framework import (
+    LayerHelper,
+    _non_static_mode,
+    convert_np_dtype_to_dtype_,
+    core,
+    in_dygraph_mode,
+)
 
-# TODO: define searching & indexing functions of a tensor
 # from ..fluid.layers import has_inf  #DEFINE_ALIAS
 # from ..fluid.layers import has_nan  #DEFINE_ALIAS
 
diff --git a/python/paddle/tensor/stat.py b/python/paddle/tensor/stat.py
index 4eefa198ea43776fe962806cbba40083676bf315..d54cafdf04cdaabdda40d20401f852f284fd9bcb 100644
--- a/python/paddle/tensor/stat.py
+++ b/python/paddle/tensor/stat.py
@@ -14,15 +14,15 @@
 
 # TODO: define statistical functions of a tensor
 
-from ..static import Variable
-from ..framework import LayerHelper
-from ..framework import core
-from paddle.fluid.framework import _in_legacy_dygraph, in_dygraph_mode
-from .search import where
-from ..fluid.data_feeder import check_type, check_variable_and_dtype
 import paddle
 from paddle import _C_ops, _legacy_C_ops
+from paddle.fluid.framework import _in_legacy_dygraph, in_dygraph_mode
+
+from ..fluid.data_feeder import check_type, check_variable_and_dtype
+from ..framework import LayerHelper, core
+from ..static import Variable
 from .math import _get_reduce_axis_with_tensor
+from .search import where
 
 __all__ = []
 
diff --git a/python/paddle/tensor/to_string.py b/python/paddle/tensor/to_string.py
index bb38d152b56082181b27ffa9277b9f19f47812fe..fda011b71779ced34a3c04565a7202061c5ee18e 100644
--- a/python/paddle/tensor/to_string.py
+++ b/python/paddle/tensor/to_string.py
@@ -13,9 +13,11 @@
 # limitations under the License.
 
 import numpy as np
-from ..framework import core
+
 from paddle.fluid.data_feeder import check_type, convert_dtype
 
+from ..framework import core
+
 __all__ = []