From 2c407ef0ec36b146062ef38432453a522b5c6282 Mon Sep 17 00:00:00 2001
From: Nyakku Shigure <sigure.qaq@gmail.com>
Date: Tue, 11 Oct 2022 16:42:45 +0800
Subject: [PATCH]  [CodeStyle][F401] remove unused import in
 unittests/test_[k-o] (#46704)

---
 .../fluid/tests/unittests/test_label_smooth_functional.py  | 3 +--
 python/paddle/fluid/tests/unittests/test_lamb_op.py        | 1 -
 python/paddle/fluid/tests/unittests/test_lambv2_op.py      | 2 --
 .../paddle/fluid/tests/unittests/test_launch_coverage.py   | 7 -------
 .../paddle/fluid/tests/unittests/test_layer_norm_op_v2.py  | 5 +----
 .../paddle/fluid/tests/unittests/test_layout_autotune.py   | 1 -
 python/paddle/fluid/tests/unittests/test_lcm.py            | 2 --
 .../fluid/tests/unittests/test_learning_rate_scheduler.py  | 1 -
 python/paddle/fluid/tests/unittests/test_linalg_pinv_op.py | 4 ----
 python/paddle/fluid/tests/unittests/test_linear.py         | 5 +----
 python/paddle/fluid/tests/unittests/test_linspace.py       | 2 +-
 .../fluid/tests/unittests/test_listen_and_serv_op.py       | 3 ---
 python/paddle/fluid/tests/unittests/test_load_op.py        | 1 -
 python/paddle/fluid/tests/unittests/test_load_op_xpu.py    | 1 -
 .../fluid/tests/unittests/test_load_vars_shape_check.py    | 2 --
 python/paddle/fluid/tests/unittests/test_lod_append_op.py  | 6 +-----
 .../fluid/tests/unittests/test_lod_array_length_op.py      | 2 +-
 .../paddle/fluid/tests/unittests/test_logcumsumexp_op.py   | 2 --
 python/paddle/fluid/tests/unittests/test_logical_op.py     | 1 -
 python/paddle/fluid/tests/unittests/test_lookahead.py      | 5 +----
 .../fluid/tests/unittests/test_lookup_table_dequant_op.py  | 7 +------
 .../fluid/tests/unittests/test_lookup_table_v2_bf16_op.py  | 3 +--
 python/paddle/fluid/tests/unittests/test_lr_scheduler.py   | 3 ---
 python/paddle/fluid/tests/unittests/test_lrn_op.py         | 2 +-
 python/paddle/fluid/tests/unittests/test_lstm_op.py        | 2 +-
 python/paddle/fluid/tests/unittests/test_lu_op.py          | 1 -
 python/paddle/fluid/tests/unittests/test_lu_unpack_op.py   | 1 -
 python/paddle/fluid/tests/unittests/test_manual_seed.py    | 2 --
 .../fluid/tests/unittests/test_margin_cross_entropy_op.py  | 3 ---
 python/paddle/fluid/tests/unittests/test_marker_op.py      | 1 -
 .../paddle/fluid/tests/unittests/test_masked_select_op.py  | 1 -
 .../fluid/tests/unittests/test_math_op_patch_var_base.py   | 2 +-
 python/paddle/fluid/tests/unittests/test_matmul_op.py      | 1 -
 python/paddle/fluid/tests/unittests/test_matmul_v2_op.py   | 1 -
 .../paddle/fluid/tests/unittests/test_matrix_power_op.py   | 4 ----
 python/paddle/fluid/tests/unittests/test_matrix_rank_op.py | 5 +----
 .../fluid/tests/unittests/test_max_min_amax_amin_op.py     | 2 --
 python/paddle/fluid/tests/unittests/test_max_op.py         | 5 +----
 python/paddle/fluid/tests/unittests/test_mean_iou.py       | 1 -
 python/paddle/fluid/tests/unittests/test_mean_op.py        | 1 -
 python/paddle/fluid/tests/unittests/test_memcpy_op.py      | 5 +----
 python/paddle/fluid/tests/unittests/test_meshgrid_op.py    | 3 +--
 python/paddle/fluid/tests/unittests/test_min_op.py         | 5 +----
 .../fluid/tests/unittests/test_mine_hard_examples_op.py    | 2 --
 .../tests/unittests/test_mix_precision_all_reduce_fuse.py  | 3 ---
 python/paddle/fluid/tests/unittests/test_modelaverage.py   | 3 ---
 python/paddle/fluid/tests/unittests/test_monitor.py        | 1 -
 python/paddle/fluid/tests/unittests/test_mul_op.py         | 1 -
 python/paddle/fluid/tests/unittests/test_multi_dot_op.py   | 2 +-
 python/paddle/fluid/tests/unittests/test_multinomial_op.py | 1 -
 python/paddle/fluid/tests/unittests/test_multiply.py       | 2 +-
 .../unittests/test_multiprocess_dataloader_dataset.py      | 4 ++--
 .../unittests/test_multiprocess_dataloader_dynamic.py      | 5 +----
 .../unittests/test_multiprocess_dataloader_exception.py    | 6 ------
 ...est_multiprocess_dataloader_iterable_dataset_dynamic.py | 5 +----
 .../test_multiprocess_dataloader_iterable_dataset_split.py | 2 +-
 ...test_multiprocess_dataloader_iterable_dataset_static.py | 4 +---
 .../tests/unittests/test_multiprocess_dataloader_static.py | 4 +---
 .../tests/unittests/test_multiprocess_reader_exception.py  | 2 --
 python/paddle/fluid/tests/unittests/test_mv_op.py          | 3 ---
 python/paddle/fluid/tests/unittests/test_nanmean_api.py    | 2 --
 python/paddle/fluid/tests/unittests/test_nansum_api.py     | 2 --
 .../fluid/tests/unittests/test_nearest_interp_v2_op.py     | 1 -
 .../fluid/tests/unittests/test_network_with_dtype.py       | 2 --
 .../unittests/test_nn_functional_embedding_dygraph.py      | 1 -
 .../fluid/tests/unittests/test_nn_functional_hot_op.py     | 2 --
 .../paddle/fluid/tests/unittests/test_nn_matmul_v2_grad.py | 1 -
 python/paddle/fluid/tests/unittests/test_nn_sigmoid_op.py  | 2 --
 python/paddle/fluid/tests/unittests/test_nonzero_api.py    | 1 -
 python/paddle/fluid/tests/unittests/test_normalize.py      | 1 -
 .../paddle/fluid/tests/unittests/test_number_count_op.py   | 4 ----
 python/paddle/fluid/tests/unittests/test_numel_op.py       | 3 ---
 python/paddle/fluid/tests/unittests/test_one_hot_op.py     | 2 --
 python/paddle/fluid/tests/unittests/test_one_hot_v2_op.py  | 2 --
 python/paddle/fluid/tests/unittests/test_ones_like.py      | 2 +-
 python/paddle/fluid/tests/unittests/test_ones_op.py        | 3 ---
 python/paddle/fluid/tests/unittests/test_onnx_export.py    | 5 +----
 .../fluid/tests/unittests/test_op_function_generator.py    | 5 ++---
 python/paddle/fluid/tests/unittests/test_outer.py          | 2 +-
 79 files changed, 31 insertions(+), 179 deletions(-)

diff --git a/python/paddle/fluid/tests/unittests/test_label_smooth_functional.py b/python/paddle/fluid/tests/unittests/test_label_smooth_functional.py
index 2fef18fd6b..c5859b7311 100644
--- a/python/paddle/fluid/tests/unittests/test_label_smooth_functional.py
+++ b/python/paddle/fluid/tests/unittests/test_label_smooth_functional.py
@@ -14,10 +14,9 @@
 
 import numpy as np
 import paddle
-from paddle import fluid, nn
+from paddle import fluid
 import paddle.fluid.dygraph as dg
 import paddle.nn.functional as F
-import paddle.fluid.initializer as I
 import unittest
 
 
diff --git a/python/paddle/fluid/tests/unittests/test_lamb_op.py b/python/paddle/fluid/tests/unittests/test_lamb_op.py
index 03374d3d07..eaa8db7031 100644
--- a/python/paddle/fluid/tests/unittests/test_lamb_op.py
+++ b/python/paddle/fluid/tests/unittests/test_lamb_op.py
@@ -16,7 +16,6 @@ import unittest
 import numpy as np
 from op_test import OpTest
 import paddle
-import paddle.fluid as fluid
 from paddle.fluid import core
 from paddle.fluid.op import Operator
 
diff --git a/python/paddle/fluid/tests/unittests/test_lambv2_op.py b/python/paddle/fluid/tests/unittests/test_lambv2_op.py
index ff18e53bb0..1e01f3a4ce 100644
--- a/python/paddle/fluid/tests/unittests/test_lambv2_op.py
+++ b/python/paddle/fluid/tests/unittests/test_lambv2_op.py
@@ -14,9 +14,7 @@
 
 import unittest
 import numpy as np
-from op_test import OpTest
 from paddle.fluid import core
-from paddle.fluid.op import Operator
 from paddle.fluid.dygraph.base import switch_to_static_graph
 import paddle
 import paddle.fluid as fluid
diff --git a/python/paddle/fluid/tests/unittests/test_launch_coverage.py b/python/paddle/fluid/tests/unittests/test_launch_coverage.py
index 8f9b39b0a4..00db6590d6 100644
--- a/python/paddle/fluid/tests/unittests/test_launch_coverage.py
+++ b/python/paddle/fluid/tests/unittests/test_launch_coverage.py
@@ -12,14 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import sys
-import subprocess
-import os
-import time
-import six
-import copy
 import unittest
-import paddle.fluid as fluid
 
 from argparse import ArgumentParser, REMAINDER
 from paddle.distributed.utils.launch_utils import _print_arguments, get_gpus, get_cluster_from_args
diff --git a/python/paddle/fluid/tests/unittests/test_layer_norm_op_v2.py b/python/paddle/fluid/tests/unittests/test_layer_norm_op_v2.py
index 62a0f00eba..8d6dfab719 100644
--- a/python/paddle/fluid/tests/unittests/test_layer_norm_op_v2.py
+++ b/python/paddle/fluid/tests/unittests/test_layer_norm_op_v2.py
@@ -12,14 +12,11 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import os
 import unittest
 import numpy as np
 import paddle.fluid.core as core
-from paddle.fluid.op import Operator
 import paddle.fluid as fluid
-from op_test import OpTest, _set_use_system_allocator
-from paddle.fluid.framework import grad_var_name, _test_eager_guard
+from paddle.fluid.framework import _test_eager_guard
 import paddle.fluid as fluid
 from paddle.fluid import Program, program_guard
 import paddle
diff --git a/python/paddle/fluid/tests/unittests/test_layout_autotune.py b/python/paddle/fluid/tests/unittests/test_layout_autotune.py
index 497bcd89e1..e004850587 100644
--- a/python/paddle/fluid/tests/unittests/test_layout_autotune.py
+++ b/python/paddle/fluid/tests/unittests/test_layout_autotune.py
@@ -17,7 +17,6 @@ import json
 import tempfile
 import unittest
 import warnings
-import numpy
 
 import paddle
 import paddle.nn.functional as F
diff --git a/python/paddle/fluid/tests/unittests/test_lcm.py b/python/paddle/fluid/tests/unittests/test_lcm.py
index d03e9f5998..6f113c13a0 100644
--- a/python/paddle/fluid/tests/unittests/test_lcm.py
+++ b/python/paddle/fluid/tests/unittests/test_lcm.py
@@ -17,8 +17,6 @@ import numpy as np
 import paddle
 import paddle.fluid as fluid
 import paddle.fluid.core as core
-from paddle.fluid import Program, program_guard
-from op_test import OpTest
 
 paddle.enable_static()
 
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 5ea1a7638c..bd73f628a0 100644
--- a/python/paddle/fluid/tests/unittests/test_learning_rate_scheduler.py
+++ b/python/paddle/fluid/tests/unittests/test_learning_rate_scheduler.py
@@ -17,7 +17,6 @@ import math
 import numpy as np
 import unittest
 
-import paddle
 import paddle.fluid as fluid
 import paddle.fluid.layers as layers
 import paddle.fluid.framework as framework
diff --git a/python/paddle/fluid/tests/unittests/test_linalg_pinv_op.py b/python/paddle/fluid/tests/unittests/test_linalg_pinv_op.py
index 247e3861c3..03e671d883 100644
--- a/python/paddle/fluid/tests/unittests/test_linalg_pinv_op.py
+++ b/python/paddle/fluid/tests/unittests/test_linalg_pinv_op.py
@@ -16,11 +16,7 @@ import unittest
 import numpy as np
 import paddle
 import paddle.fluid as fluid
-import paddle.fluid.layers as layers
 import paddle.fluid.core as core
-from op_test import OpTest, skip_check_grad_ci
-from gradient_checker import grad_check
-from decorator_helper import prog_scope
 
 
 class LinalgPinvTestCase(unittest.TestCase):
diff --git a/python/paddle/fluid/tests/unittests/test_linear.py b/python/paddle/fluid/tests/unittests/test_linear.py
index 65cc224eed..eaf2cb528c 100644
--- a/python/paddle/fluid/tests/unittests/test_linear.py
+++ b/python/paddle/fluid/tests/unittests/test_linear.py
@@ -15,12 +15,9 @@
 import unittest
 import numpy as np
 import paddle.fluid.core as core
-from op_test import OpTest
 import paddle
-from paddle import fluid, nn
-import paddle.fluid.dygraph as dg
+from paddle import fluid
 import paddle.nn.functional as F
-import paddle.fluid.initializer as I
 
 
 class LinearTestCase(unittest.TestCase):
diff --git a/python/paddle/fluid/tests/unittests/test_linspace.py b/python/paddle/fluid/tests/unittests/test_linspace.py
index c135813515..c38d5b1fe5 100644
--- a/python/paddle/fluid/tests/unittests/test_linspace.py
+++ b/python/paddle/fluid/tests/unittests/test_linspace.py
@@ -17,7 +17,7 @@ import numpy as np
 from op_test import OpTest
 import paddle
 import paddle.fluid as fluid
-from paddle.fluid import compiler, Program, program_guard
+from paddle.fluid import Program, program_guard
 from paddle.fluid import core
 from paddle.fluid.framework import _test_eager_guard
 
diff --git a/python/paddle/fluid/tests/unittests/test_listen_and_serv_op.py b/python/paddle/fluid/tests/unittests/test_listen_and_serv_op.py
index 62bf274a4e..62e063179f 100644
--- a/python/paddle/fluid/tests/unittests/test_listen_and_serv_op.py
+++ b/python/paddle/fluid/tests/unittests/test_listen_and_serv_op.py
@@ -19,12 +19,9 @@ silentremove("test_list_and_serv_run_empty_optimize_block.flag")
 
 import paddle
 import paddle.fluid as fluid
-import signal
-import subprocess
 import time
 import unittest
 from multiprocessing import Process
-from op_test import OpTest
 
 paddle.enable_static()
 
diff --git a/python/paddle/fluid/tests/unittests/test_load_op.py b/python/paddle/fluid/tests/unittests/test_load_op.py
index 534c6d832e..1b81f3b8f4 100644
--- a/python/paddle/fluid/tests/unittests/test_load_op.py
+++ b/python/paddle/fluid/tests/unittests/test_load_op.py
@@ -14,7 +14,6 @@
 
 import unittest
 import numpy as np
-from op_test import OpTest, randomize_probability
 import paddle.fluid as fluid
 import paddle.fluid.layers as layers
 import os
diff --git a/python/paddle/fluid/tests/unittests/test_load_op_xpu.py b/python/paddle/fluid/tests/unittests/test_load_op_xpu.py
index 0ec944aba9..957fe5aa42 100644
--- a/python/paddle/fluid/tests/unittests/test_load_op_xpu.py
+++ b/python/paddle/fluid/tests/unittests/test_load_op_xpu.py
@@ -16,7 +16,6 @@ import unittest
 import numpy as np
 import os
 import tempfile
-from op_test import OpTest, randomize_probability
 import paddle.fluid as fluid
 import paddle.fluid.layers as layers
 import paddle
diff --git a/python/paddle/fluid/tests/unittests/test_load_vars_shape_check.py b/python/paddle/fluid/tests/unittests/test_load_vars_shape_check.py
index 566c4929bf..2d9bd1ac65 100644
--- a/python/paddle/fluid/tests/unittests/test_load_vars_shape_check.py
+++ b/python/paddle/fluid/tests/unittests/test_load_vars_shape_check.py
@@ -15,8 +15,6 @@
 import unittest
 import os
 import shutil
-import numpy as np
-import paddle as paddle
 import paddle.fluid as fluid
 from paddle.fluid.executor import Executor
 
diff --git a/python/paddle/fluid/tests/unittests/test_lod_append_op.py b/python/paddle/fluid/tests/unittests/test_lod_append_op.py
index 7a7d76eee7..23d828b3cd 100644
--- a/python/paddle/fluid/tests/unittests/test_lod_append_op.py
+++ b/python/paddle/fluid/tests/unittests/test_lod_append_op.py
@@ -15,11 +15,7 @@
 import unittest
 import numpy as np
 import paddle.fluid as fluid
-import paddle.fluid.layers as layers
-import paddle.fluid.core as core
-from paddle.fluid import compiler, Program, program_guard
-from paddle.fluid.op import Operator
-from paddle.fluid.backward import append_backward
+from paddle.fluid import Program
 
 
 class TestLoDAppendAPI(unittest.TestCase):
diff --git a/python/paddle/fluid/tests/unittests/test_lod_array_length_op.py b/python/paddle/fluid/tests/unittests/test_lod_array_length_op.py
index 67f7ee93c6..4129c59edc 100644
--- a/python/paddle/fluid/tests/unittests/test_lod_array_length_op.py
+++ b/python/paddle/fluid/tests/unittests/test_lod_array_length_op.py
@@ -19,7 +19,7 @@ import paddle.fluid.layers as layers
 from paddle.fluid.executor import Executor
 import paddle.fluid.core as core
 import paddle.fluid as fluid
-from paddle.fluid import compiler, Program, program_guard
+from paddle.fluid import Program, program_guard
 import numpy
 
 
diff --git a/python/paddle/fluid/tests/unittests/test_logcumsumexp_op.py b/python/paddle/fluid/tests/unittests/test_logcumsumexp_op.py
index 55ffbe52a7..566b65624e 100644
--- a/python/paddle/fluid/tests/unittests/test_logcumsumexp_op.py
+++ b/python/paddle/fluid/tests/unittests/test_logcumsumexp_op.py
@@ -19,8 +19,6 @@ import numpy as np
 import paddle
 import paddle.fluid.core as core
 import paddle.fluid as fluid
-from paddle.fluid import compiler, Program, program_guard
-from paddle.fluid.framework import _test_eager_guard
 from op_test import OpTest
 
 
diff --git a/python/paddle/fluid/tests/unittests/test_logical_op.py b/python/paddle/fluid/tests/unittests/test_logical_op.py
index e9600ce8a7..c36445e7b0 100755
--- a/python/paddle/fluid/tests/unittests/test_logical_op.py
+++ b/python/paddle/fluid/tests/unittests/test_logical_op.py
@@ -12,7 +12,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import op_test
 import unittest
 import numpy as np
 import paddle
diff --git a/python/paddle/fluid/tests/unittests/test_lookahead.py b/python/paddle/fluid/tests/unittests/test_lookahead.py
index 2e2024c1c4..10c2ef78b8 100644
--- a/python/paddle/fluid/tests/unittests/test_lookahead.py
+++ b/python/paddle/fluid/tests/unittests/test_lookahead.py
@@ -14,13 +14,10 @@
 
 import unittest
 import numpy as np
-from op_test import OpTest
-from paddle.fluid import core
-from paddle.fluid.op import Operator
 import paddle.fluid as fluid
 import paddle
 import paddle.nn as nn
-from paddle.fluid.framework import _test_eager_guard, _in_legacy_dygraph
+from paddle.fluid.framework import _test_eager_guard
 
 LOOKAHEAD_K = 5
 LOOKAHEAD_ALPHA = 0.2
diff --git a/python/paddle/fluid/tests/unittests/test_lookup_table_dequant_op.py b/python/paddle/fluid/tests/unittests/test_lookup_table_dequant_op.py
index e04565a4c3..bd15a3ac1c 100644
--- a/python/paddle/fluid/tests/unittests/test_lookup_table_dequant_op.py
+++ b/python/paddle/fluid/tests/unittests/test_lookup_table_dequant_op.py
@@ -14,12 +14,7 @@
 
 import unittest
 import numpy as np
-from op_test import OpTest, skip_check_grad_ci
-import paddle.fluid.core as core
-from paddle.fluid.op import Operator
-import paddle.compat as cpt
-import paddle.fluid as fluid
-from paddle.fluid import Program, program_guard
+from op_test import OpTest
 import struct
 
 
diff --git a/python/paddle/fluid/tests/unittests/test_lookup_table_v2_bf16_op.py b/python/paddle/fluid/tests/unittests/test_lookup_table_v2_bf16_op.py
index 9509889f0b..a479693d51 100644
--- a/python/paddle/fluid/tests/unittests/test_lookup_table_v2_bf16_op.py
+++ b/python/paddle/fluid/tests/unittests/test_lookup_table_v2_bf16_op.py
@@ -15,8 +15,7 @@
 import unittest
 import numpy as np
 import paddle
-from paddle.fluid.tests.unittests.op_test import (skip_check_grad_ci,
-                                                  convert_uint16_to_float)
+from paddle.fluid.tests.unittests.op_test import convert_uint16_to_float
 from paddle.fluid.tests.unittests.test_lookup_table_bf16_op import (
     _lookup, TestLookupTableBF16Op, TestLookupTableBF16OpIds4D,
     TestLookupTableBF16OpWIsSelectedRows,
diff --git a/python/paddle/fluid/tests/unittests/test_lr_scheduler.py b/python/paddle/fluid/tests/unittests/test_lr_scheduler.py
index d4dac6143d..2d76f141f9 100644
--- a/python/paddle/fluid/tests/unittests/test_lr_scheduler.py
+++ b/python/paddle/fluid/tests/unittests/test_lr_scheduler.py
@@ -12,15 +12,12 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import copy
 import math
 import numpy as np
 import unittest
 
 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
 
 
diff --git a/python/paddle/fluid/tests/unittests/test_lrn_op.py b/python/paddle/fluid/tests/unittests/test_lrn_op.py
index 96d76fcee2..c87d3067cc 100644
--- a/python/paddle/fluid/tests/unittests/test_lrn_op.py
+++ b/python/paddle/fluid/tests/unittests/test_lrn_op.py
@@ -18,7 +18,7 @@ import numpy as np
 import paddle.fluid as fluid
 import paddle.fluid.core as core
 from op_test import OpTest
-from paddle.fluid import compiler, Program, program_guard
+from paddle.fluid import Program, program_guard
 
 
 class TestLRNOp(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_lstm_op.py b/python/paddle/fluid/tests/unittests/test_lstm_op.py
index 4d12b4311d..db701a7b73 100644
--- a/python/paddle/fluid/tests/unittests/test_lstm_op.py
+++ b/python/paddle/fluid/tests/unittests/test_lstm_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from op_test import OpTest, skip_check_grad_ci
+from op_test import OpTest
 from paddle import fluid
 from paddle.fluid.layers import lstm as LSTM
 from paddle.fluid.layers import fill_constant
diff --git a/python/paddle/fluid/tests/unittests/test_lu_op.py b/python/paddle/fluid/tests/unittests/test_lu_op.py
index 43ad2a027e..0c24bcd686 100644
--- a/python/paddle/fluid/tests/unittests/test_lu_op.py
+++ b/python/paddle/fluid/tests/unittests/test_lu_op.py
@@ -18,7 +18,6 @@ import itertools
 import numpy as np
 import paddle
 import paddle.fluid as fluid
-import paddle.fluid.layers as layers
 import paddle.fluid.core as core
 import scipy
 import scipy.linalg
diff --git a/python/paddle/fluid/tests/unittests/test_lu_unpack_op.py b/python/paddle/fluid/tests/unittests/test_lu_unpack_op.py
index fad97b2197..1ec36680fa 100644
--- a/python/paddle/fluid/tests/unittests/test_lu_unpack_op.py
+++ b/python/paddle/fluid/tests/unittests/test_lu_unpack_op.py
@@ -18,7 +18,6 @@ import itertools
 import numpy as np
 import paddle
 import paddle.fluid as fluid
-import paddle.fluid.layers as layers
 import paddle.fluid.core as core
 import scipy
 import scipy.linalg
diff --git a/python/paddle/fluid/tests/unittests/test_manual_seed.py b/python/paddle/fluid/tests/unittests/test_manual_seed.py
index 7ef2cee14a..7d9762c788 100644
--- a/python/paddle/fluid/tests/unittests/test_manual_seed.py
+++ b/python/paddle/fluid/tests/unittests/test_manual_seed.py
@@ -16,8 +16,6 @@ import unittest
 
 import paddle
 import paddle.fluid as fluid
-from paddle.framework import seed
-from paddle.fluid.framework import Program, default_main_program, default_startup_program
 import numpy as np
 
 
diff --git a/python/paddle/fluid/tests/unittests/test_margin_cross_entropy_op.py b/python/paddle/fluid/tests/unittests/test_margin_cross_entropy_op.py
index 746a01039c..6473ab7568 100644
--- a/python/paddle/fluid/tests/unittests/test_margin_cross_entropy_op.py
+++ b/python/paddle/fluid/tests/unittests/test_margin_cross_entropy_op.py
@@ -15,10 +15,7 @@
 import unittest
 import numpy as np
 from op_test import OpTest
-import math
-import random
 import paddle
-import paddle.fluid as fluid
 from paddle.fluid import core
 from paddle.fluid import Program, program_guard
 
diff --git a/python/paddle/fluid/tests/unittests/test_marker_op.py b/python/paddle/fluid/tests/unittests/test_marker_op.py
index cdf132b72b..f0cb6ec1bb 100644
--- a/python/paddle/fluid/tests/unittests/test_marker_op.py
+++ b/python/paddle/fluid/tests/unittests/test_marker_op.py
@@ -12,7 +12,6 @@
 # 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 paddle.distributed.fleet.meta_optimizers.common import OpRole
 
diff --git a/python/paddle/fluid/tests/unittests/test_masked_select_op.py b/python/paddle/fluid/tests/unittests/test_masked_select_op.py
index 80b2e28f94..4de07192dd 100644
--- a/python/paddle/fluid/tests/unittests/test_masked_select_op.py
+++ b/python/paddle/fluid/tests/unittests/test_masked_select_op.py
@@ -15,7 +15,6 @@
 import unittest
 import numpy as np
 from op_test import OpTest
-import paddle.fluid as fluid
 import paddle
 
 
diff --git a/python/paddle/fluid/tests/unittests/test_math_op_patch_var_base.py b/python/paddle/fluid/tests/unittests/test_math_op_patch_var_base.py
index 05e774451b..5c66d4cd6b 100644
--- a/python/paddle/fluid/tests/unittests/test_math_op_patch_var_base.py
+++ b/python/paddle/fluid/tests/unittests/test_math_op_patch_var_base.py
@@ -17,7 +17,7 @@ import paddle
 import paddle.fluid as fluid
 import numpy as np
 import inspect
-from paddle.fluid.framework import _test_eager_guard, _in_legacy_dygraph
+from paddle.fluid.framework import _test_eager_guard
 
 
 class TestMathOpPatchesVarBase(unittest.TestCase):
diff --git a/python/paddle/fluid/tests/unittests/test_matmul_op.py b/python/paddle/fluid/tests/unittests/test_matmul_op.py
index 4401c6ef81..b8ca9b9dc1 100644
--- a/python/paddle/fluid/tests/unittests/test_matmul_op.py
+++ b/python/paddle/fluid/tests/unittests/test_matmul_op.py
@@ -12,7 +12,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import paddle.fluid.core as core
 import unittest
 import numpy as np
 from op_test import OpTest
diff --git a/python/paddle/fluid/tests/unittests/test_matmul_v2_op.py b/python/paddle/fluid/tests/unittests/test_matmul_v2_op.py
index 7a2f75400b..4caffe5019 100644
--- a/python/paddle/fluid/tests/unittests/test_matmul_v2_op.py
+++ b/python/paddle/fluid/tests/unittests/test_matmul_v2_op.py
@@ -20,7 +20,6 @@ import paddle.fluid.core as core
 
 import paddle
 import paddle.fluid as fluid
-import paddle.fluid.framework as framework
 from paddle.fluid.framework import _test_eager_guard
 
 
diff --git a/python/paddle/fluid/tests/unittests/test_matrix_power_op.py b/python/paddle/fluid/tests/unittests/test_matrix_power_op.py
index 92ce97d882..af400b1461 100644
--- a/python/paddle/fluid/tests/unittests/test_matrix_power_op.py
+++ b/python/paddle/fluid/tests/unittests/test_matrix_power_op.py
@@ -359,10 +359,8 @@ class TestMatrixPowerSingularAPI(unittest.TestCase):
                                   fetch_list=[result])
             except RuntimeError as ex:
                 print("The mat is singular")
-                pass
             except ValueError as ex:
                 print("The mat is singular")
-                pass
 
     def test_static(self):
         paddle.enable_static()
@@ -379,10 +377,8 @@ class TestMatrixPowerSingularAPI(unittest.TestCase):
                     result = paddle.linalg.matrix_power(input, -2)
                 except RuntimeError as ex:
                     print("The mat is singular")
-                    pass
                 except ValueError as ex:
                     print("The mat is singular")
-                    pass
 
 
 if __name__ == "__main__":
diff --git a/python/paddle/fluid/tests/unittests/test_matrix_rank_op.py b/python/paddle/fluid/tests/unittests/test_matrix_rank_op.py
index 316079a865..3c3dba8800 100644
--- a/python/paddle/fluid/tests/unittests/test_matrix_rank_op.py
+++ b/python/paddle/fluid/tests/unittests/test_matrix_rank_op.py
@@ -16,13 +16,10 @@ import unittest
 
 import numpy as np
 
-from paddle.fluid.tests.unittests.op_test import OpTest, convert_float_to_uint16
+from paddle.fluid.tests.unittests.op_test import OpTest
 import paddle
-import paddle.nn as nn
-import paddle.nn.functional as F
 import paddle.fluid as fluid
 import paddle.fluid.core as core
-from paddle.fluid import compiler, Program, program_guard
 
 paddle.enable_static()
 SEED = 2049
diff --git a/python/paddle/fluid/tests/unittests/test_max_min_amax_amin_op.py b/python/paddle/fluid/tests/unittests/test_max_min_amax_amin_op.py
index f7509ba1c8..ee316bb043 100644
--- a/python/paddle/fluid/tests/unittests/test_max_min_amax_amin_op.py
+++ b/python/paddle/fluid/tests/unittests/test_max_min_amax_amin_op.py
@@ -17,8 +17,6 @@ import numpy as np
 import paddle
 import paddle.fluid as fluid
 import paddle.fluid.core as core
-from paddle.fluid import Program, program_guard
-from op_test import OpTest
 
 paddle.enable_static()
 
diff --git a/python/paddle/fluid/tests/unittests/test_max_op.py b/python/paddle/fluid/tests/unittests/test_max_op.py
index 844374b641..cf52cdb8d4 100644
--- a/python/paddle/fluid/tests/unittests/test_max_op.py
+++ b/python/paddle/fluid/tests/unittests/test_max_op.py
@@ -12,15 +12,12 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import os
 import unittest
-import tempfile
 import numpy as np
-from op_test import OpTest, skip_check_grad_ci, check_out_dtype
+from op_test import check_out_dtype
 import paddle
 from paddle.fluid.framework import _test_eager_guard
 import paddle.fluid.core as core
-import paddle.inference as paddle_infer
 from test_sum_op import TestReduceOPTensorAxisBase
 
 
diff --git a/python/paddle/fluid/tests/unittests/test_mean_iou.py b/python/paddle/fluid/tests/unittests/test_mean_iou.py
index e334d881c8..d55d1507f9 100644
--- a/python/paddle/fluid/tests/unittests/test_mean_iou.py
+++ b/python/paddle/fluid/tests/unittests/test_mean_iou.py
@@ -16,7 +16,6 @@ import unittest
 import numpy as np
 from op_test import OpTest
 import paddle.fluid as fluid
-import paddle
 
 
 def compute_mean_iou(predictions, labels, num_classes, in_wrongs, in_corrects,
diff --git a/python/paddle/fluid/tests/unittests/test_mean_op.py b/python/paddle/fluid/tests/unittests/test_mean_op.py
index f7ca51dbd6..6ba980879a 100644
--- a/python/paddle/fluid/tests/unittests/test_mean_op.py
+++ b/python/paddle/fluid/tests/unittests/test_mean_op.py
@@ -19,7 +19,6 @@ import paddle
 import paddle.fluid.core as core
 import paddle.fluid as fluid
 from paddle.fluid import Program, program_guard
-from paddle.fluid.framework import _test_eager_guard
 from test_sum_op import TestReduceOPTensorAxisBase
 import gradient_checker
 from decorator_helper import prog_scope
diff --git a/python/paddle/fluid/tests/unittests/test_memcpy_op.py b/python/paddle/fluid/tests/unittests/test_memcpy_op.py
index 9288cbda2b..8ab07ad958 100755
--- a/python/paddle/fluid/tests/unittests/test_memcpy_op.py
+++ b/python/paddle/fluid/tests/unittests/test_memcpy_op.py
@@ -12,15 +12,12 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import op_test
 import numpy as np
 import unittest
 import paddle
 import paddle.fluid.core as core
-from paddle.fluid.op import Operator
 import paddle.fluid as fluid
-from paddle.fluid import compiler, Program, program_guard
-from paddle.fluid.backward import append_backward
+from paddle.fluid import Program, program_guard
 
 
 class TestMemcpy_FillConstant(unittest.TestCase):
diff --git a/python/paddle/fluid/tests/unittests/test_meshgrid_op.py b/python/paddle/fluid/tests/unittests/test_meshgrid_op.py
index df8a85792e..f49ac0d1d5 100644
--- a/python/paddle/fluid/tests/unittests/test_meshgrid_op.py
+++ b/python/paddle/fluid/tests/unittests/test_meshgrid_op.py
@@ -14,10 +14,9 @@
 
 import unittest
 import numpy as np
-from op_test import OpTest, skip_check_grad_ci
+from op_test import OpTest
 import paddle.fluid as fluid
 import paddle
-from paddle.fluid import compiler, Program, program_guard, core
 from paddle.fluid.framework import _test_eager_guard
 
 
diff --git a/python/paddle/fluid/tests/unittests/test_min_op.py b/python/paddle/fluid/tests/unittests/test_min_op.py
index b255404098..1f4cd92624 100644
--- a/python/paddle/fluid/tests/unittests/test_min_op.py
+++ b/python/paddle/fluid/tests/unittests/test_min_op.py
@@ -12,15 +12,12 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import os
 import unittest
-import tempfile
 import numpy as np
-from op_test import OpTest, skip_check_grad_ci, check_out_dtype
+from op_test import check_out_dtype
 import paddle
 import paddle.fluid.core as core
 from paddle.fluid.framework import _test_eager_guard
-import paddle.inference as paddle_infer
 from test_sum_op import TestReduceOPTensorAxisBase
 
 
diff --git a/python/paddle/fluid/tests/unittests/test_mine_hard_examples_op.py b/python/paddle/fluid/tests/unittests/test_mine_hard_examples_op.py
index 0e9e8f084c..6732965272 100644
--- a/python/paddle/fluid/tests/unittests/test_mine_hard_examples_op.py
+++ b/python/paddle/fluid/tests/unittests/test_mine_hard_examples_op.py
@@ -14,8 +14,6 @@
 
 import unittest
 import numpy as np
-import sys
-import math
 from op_test import OpTest
 
 
diff --git a/python/paddle/fluid/tests/unittests/test_mix_precision_all_reduce_fuse.py b/python/paddle/fluid/tests/unittests/test_mix_precision_all_reduce_fuse.py
index be3ac17f66..bc57d38b77 100644
--- a/python/paddle/fluid/tests/unittests/test_mix_precision_all_reduce_fuse.py
+++ b/python/paddle/fluid/tests/unittests/test_mix_precision_all_reduce_fuse.py
@@ -13,9 +13,6 @@
 # limitations under the License.
 
 import paddle.fluid.core as core
-import math
-import os
-import sys
 import unittest
 
 import numpy as np
diff --git a/python/paddle/fluid/tests/unittests/test_modelaverage.py b/python/paddle/fluid/tests/unittests/test_modelaverage.py
index 86beb42a56..474fa692b4 100644
--- a/python/paddle/fluid/tests/unittests/test_modelaverage.py
+++ b/python/paddle/fluid/tests/unittests/test_modelaverage.py
@@ -14,9 +14,6 @@
 
 import unittest
 import numpy as np
-from op_test import OpTest
-from paddle.fluid import core
-from paddle.fluid.op import Operator
 import paddle.fluid as fluid
 import paddle
 import paddle.nn as nn
diff --git a/python/paddle/fluid/tests/unittests/test_monitor.py b/python/paddle/fluid/tests/unittests/test_monitor.py
index 2eecacc5fa..8649f11821 100644
--- a/python/paddle/fluid/tests/unittests/test_monitor.py
+++ b/python/paddle/fluid/tests/unittests/test_monitor.py
@@ -21,7 +21,6 @@ paddle.enable_static()
 
 import paddle.fluid as fluid
 import paddle.fluid.core as core
-import numpy as np
 import os
 import unittest
 import tempfile
diff --git a/python/paddle/fluid/tests/unittests/test_mul_op.py b/python/paddle/fluid/tests/unittests/test_mul_op.py
index 892e0dd98e..0236f34ea8 100644
--- a/python/paddle/fluid/tests/unittests/test_mul_op.py
+++ b/python/paddle/fluid/tests/unittests/test_mul_op.py
@@ -14,7 +14,6 @@
 
 import unittest
 import numpy as np
-import paddle
 import paddle.fluid.core as core
 import sys
 
diff --git a/python/paddle/fluid/tests/unittests/test_multi_dot_op.py b/python/paddle/fluid/tests/unittests/test_multi_dot_op.py
index 8e58aeb2c1..ce188cac5c 100644
--- a/python/paddle/fluid/tests/unittests/test_multi_dot_op.py
+++ b/python/paddle/fluid/tests/unittests/test_multi_dot_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from op_test import OpTest, skip_check_grad_ci
+from op_test import OpTest
 from numpy.linalg import multi_dot
 from op_test import OpTest
 import paddle
diff --git a/python/paddle/fluid/tests/unittests/test_multinomial_op.py b/python/paddle/fluid/tests/unittests/test_multinomial_op.py
index 71e6cca290..5df70185dd 100644
--- a/python/paddle/fluid/tests/unittests/test_multinomial_op.py
+++ b/python/paddle/fluid/tests/unittests/test_multinomial_op.py
@@ -15,7 +15,6 @@
 import unittest
 import paddle
 import paddle.fluid as fluid
-from paddle.fluid import core
 from op_test import OpTest
 import numpy as np
 import os
diff --git a/python/paddle/fluid/tests/unittests/test_multiply.py b/python/paddle/fluid/tests/unittests/test_multiply.py
index 55d17f7156..e32245990a 100755
--- a/python/paddle/fluid/tests/unittests/test_multiply.py
+++ b/python/paddle/fluid/tests/unittests/test_multiply.py
@@ -19,7 +19,7 @@ import numpy as np
 import paddle
 import paddle.tensor as tensor
 from paddle.static import Program, program_guard
-from paddle.fluid.framework import _test_eager_guard, in_dygraph_mode
+from paddle.fluid.framework import _test_eager_guard
 
 
 class TestMultiplyApi(unittest.TestCase):
diff --git a/python/paddle/fluid/tests/unittests/test_multiprocess_dataloader_dataset.py b/python/paddle/fluid/tests/unittests/test_multiprocess_dataloader_dataset.py
index 1ecddc6268..4cf28bbd30 100755
--- a/python/paddle/fluid/tests/unittests/test_multiprocess_dataloader_dataset.py
+++ b/python/paddle/fluid/tests/unittests/test_multiprocess_dataloader_dataset.py
@@ -18,8 +18,8 @@ import numpy as np
 import paddle
 import paddle.fluid as fluid
 from paddle.io import Dataset, IterableDataset, TensorDataset, \
-        ComposeDataset, ChainDataset, DataLoader, random_split, Subset
-from paddle.fluid.framework import _test_eager_guard, _in_legacy_dygraph
+        ComposeDataset, ChainDataset, DataLoader
+from paddle.fluid.framework import _test_eager_guard
 
 IMAGE_SIZE = 32
 
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 419e769b93..32e5627736 100644
--- a/python/paddle/fluid/tests/unittests/test_multiprocess_dataloader_dynamic.py
+++ b/python/paddle/fluid/tests/unittests/test_multiprocess_dataloader_dynamic.py
@@ -12,18 +12,15 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import os
 import sys
 import six
 import time
 import unittest
-import multiprocessing
 import numpy as np
 
 import paddle.fluid as fluid
-from paddle.io import Dataset, BatchSampler, DataLoader
+from paddle.io import DataLoader
 from paddle.fluid.dygraph.nn import Linear
-from paddle.fluid.dygraph.base import to_variable
 
 from test_multiprocess_dataloader_static import RandomDataset, RandomBatchedDataset, prepare_places
 from test_multiprocess_dataloader_static import EPOCH_NUM, BATCH_SIZE, IMAGE_SIZE, SAMPLE_NUM, CLASS_NUM
diff --git a/python/paddle/fluid/tests/unittests/test_multiprocess_dataloader_exception.py b/python/paddle/fluid/tests/unittests/test_multiprocess_dataloader_exception.py
index 096c6ce542..ea4b9363bf 100644
--- a/python/paddle/fluid/tests/unittests/test_multiprocess_dataloader_exception.py
+++ b/python/paddle/fluid/tests/unittests/test_multiprocess_dataloader_exception.py
@@ -12,10 +12,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import os
-import sys
-import six
-import time
 import unittest
 import multiprocessing
 import numpy as np
@@ -23,8 +19,6 @@ import numpy as np
 import paddle.fluid as fluid
 import paddle.fluid.core as core
 from paddle.io import Dataset, IterableDataset, BatchSampler, DataLoader
-from paddle.fluid.dygraph.nn import Linear
-from paddle.fluid.dygraph.base import to_variable
 from paddle.fluid.dataloader.dataloader_iter import _worker_loop
 
 
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 4ca1480c63..09a1f6520a 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
@@ -12,18 +12,15 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import os
 import sys
 import six
 import time
 import unittest
-import multiprocessing
 import numpy as np
 
 import paddle.fluid as fluid
-from paddle.io import Dataset, BatchSampler, DataLoader
+from paddle.io import DataLoader
 from paddle.fluid.dygraph.nn import Linear
-from paddle.fluid.dygraph.base import to_variable
 
 from test_multiprocess_dataloader_iterable_dataset_static import RandomDataset, RandomBatchedDataset, prepare_places
 from test_multiprocess_dataloader_iterable_dataset_static import EPOCH_NUM, BATCH_SIZE, IMAGE_SIZE, SAMPLE_NUM, CLASS_NUM
diff --git a/python/paddle/fluid/tests/unittests/test_multiprocess_dataloader_iterable_dataset_split.py b/python/paddle/fluid/tests/unittests/test_multiprocess_dataloader_iterable_dataset_split.py
index bf7a7bdd5d..aef0c8c7d0 100644
--- a/python/paddle/fluid/tests/unittests/test_multiprocess_dataloader_iterable_dataset_split.py
+++ b/python/paddle/fluid/tests/unittests/test_multiprocess_dataloader_iterable_dataset_split.py
@@ -17,7 +17,7 @@ import unittest
 import numpy as np
 
 import paddle.fluid as fluid
-from paddle.io import IterableDataset, BatchSampler, DataLoader, get_worker_info
+from paddle.io import DataLoader, IterableDataset, get_worker_info
 
 
 class RangeIterableDatasetSplit(IterableDataset):
diff --git a/python/paddle/fluid/tests/unittests/test_multiprocess_dataloader_iterable_dataset_static.py b/python/paddle/fluid/tests/unittests/test_multiprocess_dataloader_iterable_dataset_static.py
index 74fb23d84b..b84530ccc4 100644
--- a/python/paddle/fluid/tests/unittests/test_multiprocess_dataloader_iterable_dataset_static.py
+++ b/python/paddle/fluid/tests/unittests/test_multiprocess_dataloader_iterable_dataset_static.py
@@ -12,16 +12,14 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import os
 import sys
 import six
 import time
 import unittest
-import multiprocessing
 import numpy as np
 
 import paddle.fluid as fluid
-from paddle.io import IterableDataset, BatchSampler, DataLoader, get_worker_info
+from paddle.io import DataLoader, IterableDataset
 
 EPOCH_NUM = 2
 BATCH_SIZE = 8
diff --git a/python/paddle/fluid/tests/unittests/test_multiprocess_dataloader_static.py b/python/paddle/fluid/tests/unittests/test_multiprocess_dataloader_static.py
index d5706ab618..dc9444f2f5 100644
--- a/python/paddle/fluid/tests/unittests/test_multiprocess_dataloader_static.py
+++ b/python/paddle/fluid/tests/unittests/test_multiprocess_dataloader_static.py
@@ -12,17 +12,15 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import os
 import sys
 import six
 import time
 import unittest
-import multiprocessing
 import numpy as np
 
 import paddle
 import paddle.fluid as fluid
-from paddle.io import Dataset, BatchSampler, DataLoader
+from paddle.io import DataLoader, Dataset
 
 EPOCH_NUM = 3
 BATCH_SIZE = 8
diff --git a/python/paddle/fluid/tests/unittests/test_multiprocess_reader_exception.py b/python/paddle/fluid/tests/unittests/test_multiprocess_reader_exception.py
index 825a6b8fa4..e1033ae881 100644
--- a/python/paddle/fluid/tests/unittests/test_multiprocess_reader_exception.py
+++ b/python/paddle/fluid/tests/unittests/test_multiprocess_reader_exception.py
@@ -17,8 +17,6 @@ import paddle.fluid as fluid
 from paddle.reader import multiprocess_reader
 import unittest
 import numpy as np
-import six
-import sys
 
 
 class ReaderException(Exception):
diff --git a/python/paddle/fluid/tests/unittests/test_mv_op.py b/python/paddle/fluid/tests/unittests/test_mv_op.py
index 31ef652c3c..fbfd18a477 100644
--- a/python/paddle/fluid/tests/unittests/test_mv_op.py
+++ b/python/paddle/fluid/tests/unittests/test_mv_op.py
@@ -15,9 +15,6 @@
 import unittest
 import numpy as np
 import paddle
-import paddle.fluid as fluid
-import paddle.fluid.layers as layers
-import paddle.fluid.core as core
 from paddle.static import program_guard, Program
 from op_test import OpTest
 
diff --git a/python/paddle/fluid/tests/unittests/test_nanmean_api.py b/python/paddle/fluid/tests/unittests/test_nanmean_api.py
index 60a77b47c4..3155140518 100644
--- a/python/paddle/fluid/tests/unittests/test_nanmean_api.py
+++ b/python/paddle/fluid/tests/unittests/test_nanmean_api.py
@@ -15,9 +15,7 @@
 import unittest
 import numpy as np
 import paddle
-import paddle.fluid as fluid
 import paddle.fluid.core as core
-from paddle.fluid import Program, program_guard
 
 np.random.seed(10)
 
diff --git a/python/paddle/fluid/tests/unittests/test_nansum_api.py b/python/paddle/fluid/tests/unittests/test_nansum_api.py
index fc69296021..c0fe5da0cb 100644
--- a/python/paddle/fluid/tests/unittests/test_nansum_api.py
+++ b/python/paddle/fluid/tests/unittests/test_nansum_api.py
@@ -16,8 +16,6 @@ import unittest
 import numpy as np
 import paddle
 import paddle.fluid as fluid
-import paddle.fluid.core as core
-from paddle.fluid import Program, program_guard
 
 
 class API_Test_Nansum(unittest.TestCase):
diff --git a/python/paddle/fluid/tests/unittests/test_nearest_interp_v2_op.py b/python/paddle/fluid/tests/unittests/test_nearest_interp_v2_op.py
index f8fbca4516..c3157a6e9a 100755
--- a/python/paddle/fluid/tests/unittests/test_nearest_interp_v2_op.py
+++ b/python/paddle/fluid/tests/unittests/test_nearest_interp_v2_op.py
@@ -17,7 +17,6 @@ import numpy as np
 from op_test import OpTest
 import paddle.fluid.core as core
 import paddle.fluid as fluid
-import paddle.nn as nn
 import paddle
 from paddle.nn.functional import interpolate
 
diff --git a/python/paddle/fluid/tests/unittests/test_network_with_dtype.py b/python/paddle/fluid/tests/unittests/test_network_with_dtype.py
index f4015e2251..203dcdc38c 100644
--- a/python/paddle/fluid/tests/unittests/test_network_with_dtype.py
+++ b/python/paddle/fluid/tests/unittests/test_network_with_dtype.py
@@ -14,11 +14,9 @@
 
 import unittest
 
-import numpy as np
 import paddle
 import paddle.fluid as fluid
 import paddle.fluid.core as core
-from paddle.fluid.executor import Executor
 
 BATCH_SIZE = 20
 
diff --git a/python/paddle/fluid/tests/unittests/test_nn_functional_embedding_dygraph.py b/python/paddle/fluid/tests/unittests/test_nn_functional_embedding_dygraph.py
index 128d50f155..d658fcec83 100644
--- a/python/paddle/fluid/tests/unittests/test_nn_functional_embedding_dygraph.py
+++ b/python/paddle/fluid/tests/unittests/test_nn_functional_embedding_dygraph.py
@@ -15,7 +15,6 @@
 import unittest
 
 import paddle
-import paddle.nn as nn
 import numpy as np
 from paddle.fluid.framework import _test_eager_guard
 
diff --git a/python/paddle/fluid/tests/unittests/test_nn_functional_hot_op.py b/python/paddle/fluid/tests/unittests/test_nn_functional_hot_op.py
index e8adf3850a..27a7af9448 100644
--- a/python/paddle/fluid/tests/unittests/test_nn_functional_hot_op.py
+++ b/python/paddle/fluid/tests/unittests/test_nn_functional_hot_op.py
@@ -14,13 +14,11 @@
 
 import unittest
 import numpy as np
-import math
 from op_test import OpTest
 import paddle
 import paddle.fluid as fluid
 import paddle.fluid.core as core
 import paddle.nn.functional as functional
-import paddle.fluid.framework as framework
 from paddle.fluid.framework import Program, program_guard
 
 
diff --git a/python/paddle/fluid/tests/unittests/test_nn_matmul_v2_grad.py b/python/paddle/fluid/tests/unittests/test_nn_matmul_v2_grad.py
index f8542c0039..567ac1404c 100644
--- a/python/paddle/fluid/tests/unittests/test_nn_matmul_v2_grad.py
+++ b/python/paddle/fluid/tests/unittests/test_nn_matmul_v2_grad.py
@@ -17,7 +17,6 @@ import numpy as np
 
 import paddle
 import paddle.fluid as fluid
-import paddle.fluid.layers as layers
 import paddle.fluid.core as core
 import gradient_checker
 from decorator_helper import prog_scope
diff --git a/python/paddle/fluid/tests/unittests/test_nn_sigmoid_op.py b/python/paddle/fluid/tests/unittests/test_nn_sigmoid_op.py
index f71a6c6afc..7af7b96c99 100644
--- a/python/paddle/fluid/tests/unittests/test_nn_sigmoid_op.py
+++ b/python/paddle/fluid/tests/unittests/test_nn_sigmoid_op.py
@@ -16,8 +16,6 @@ import unittest
 import numpy as np
 import paddle
 import paddle.fluid.core as core
-from op_test import OpTest
-from scipy.special import expit, erf
 import paddle
 import paddle.fluid as fluid
 import paddle.nn as nn
diff --git a/python/paddle/fluid/tests/unittests/test_nonzero_api.py b/python/paddle/fluid/tests/unittests/test_nonzero_api.py
index a3c7960094..cd4d227e82 100644
--- a/python/paddle/fluid/tests/unittests/test_nonzero_api.py
+++ b/python/paddle/fluid/tests/unittests/test_nonzero_api.py
@@ -14,7 +14,6 @@
 
 import unittest
 import numpy as np
-from op_test import OpTest
 import paddle
 import paddle.fluid as fluid
 from paddle.fluid import Program, program_guard
diff --git a/python/paddle/fluid/tests/unittests/test_normalize.py b/python/paddle/fluid/tests/unittests/test_normalize.py
index ad8fdebfbb..bb8b4881d3 100644
--- a/python/paddle/fluid/tests/unittests/test_normalize.py
+++ b/python/paddle/fluid/tests/unittests/test_normalize.py
@@ -16,7 +16,6 @@ import unittest
 import paddle
 import paddle.nn.functional as F
 import paddle.fluid as fluid
-import paddle.fluid.core as core
 import numpy as np
 from paddle.fluid.framework import _test_eager_guard
 
diff --git a/python/paddle/fluid/tests/unittests/test_number_count_op.py b/python/paddle/fluid/tests/unittests/test_number_count_op.py
index 5fc82a9768..58e24e6692 100644
--- a/python/paddle/fluid/tests/unittests/test_number_count_op.py
+++ b/python/paddle/fluid/tests/unittests/test_number_count_op.py
@@ -17,10 +17,6 @@ import numpy as np
 import unittest
 import paddle
 import paddle.fluid.core as core
-from paddle.fluid.op import Operator
-import paddle.fluid as fluid
-from paddle.fluid import compiler, Program, program_guard
-from paddle.fluid.backward import append_backward
 from paddle.distributed.models.moe import utils
 from paddle.fluid.framework import _test_eager_guard
 
diff --git a/python/paddle/fluid/tests/unittests/test_numel_op.py b/python/paddle/fluid/tests/unittests/test_numel_op.py
index 2bdb8dde5a..7bb76c531a 100644
--- a/python/paddle/fluid/tests/unittests/test_numel_op.py
+++ b/python/paddle/fluid/tests/unittests/test_numel_op.py
@@ -15,10 +15,7 @@
 import unittest
 import numpy as np
 from op_test import OpTest
-import paddle.fluid.core as core
 import paddle.fluid as fluid
-from paddle.fluid import Program, program_guard
-import functools
 import paddle
 
 
diff --git a/python/paddle/fluid/tests/unittests/test_one_hot_op.py b/python/paddle/fluid/tests/unittests/test_one_hot_op.py
index de6a4c051e..55abf26ea2 100644
--- a/python/paddle/fluid/tests/unittests/test_one_hot_op.py
+++ b/python/paddle/fluid/tests/unittests/test_one_hot_op.py
@@ -14,12 +14,10 @@
 
 import unittest
 import numpy as np
-import math
 from op_test import OpTest
 import paddle
 import paddle.fluid as fluid
 import paddle.fluid.core as core
-import paddle.fluid.framework as framework
 from paddle.fluid.framework import Program, program_guard
 
 
diff --git a/python/paddle/fluid/tests/unittests/test_one_hot_v2_op.py b/python/paddle/fluid/tests/unittests/test_one_hot_v2_op.py
index d10db30498..284957a531 100644
--- a/python/paddle/fluid/tests/unittests/test_one_hot_v2_op.py
+++ b/python/paddle/fluid/tests/unittests/test_one_hot_v2_op.py
@@ -14,12 +14,10 @@
 
 import unittest
 import numpy as np
-import math
 from op_test import OpTest
 import paddle
 import paddle.fluid as fluid
 import paddle.fluid.core as core
-import paddle.fluid.framework as framework
 from paddle.fluid.framework import Program, program_guard, _test_eager_guard
 
 
diff --git a/python/paddle/fluid/tests/unittests/test_ones_like.py b/python/paddle/fluid/tests/unittests/test_ones_like.py
index f8ad66fc0f..8c0ceadbf5 100644
--- a/python/paddle/fluid/tests/unittests/test_ones_like.py
+++ b/python/paddle/fluid/tests/unittests/test_ones_like.py
@@ -16,7 +16,7 @@ import unittest
 import numpy as np
 import paddle
 import paddle.fluid as fluid
-from paddle import _C_ops, _legacy_C_ops
+from paddle import _C_ops
 from paddle import ones_like
 from paddle.fluid import core, Program, program_guard
 from paddle.fluid.framework import convert_np_dtype_to_dtype_
diff --git a/python/paddle/fluid/tests/unittests/test_ones_op.py b/python/paddle/fluid/tests/unittests/test_ones_op.py
index 79ca0648c9..ac02627f9c 100644
--- a/python/paddle/fluid/tests/unittests/test_ones_op.py
+++ b/python/paddle/fluid/tests/unittests/test_ones_op.py
@@ -14,11 +14,8 @@
 
 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
 import numpy as np
 
diff --git a/python/paddle/fluid/tests/unittests/test_onnx_export.py b/python/paddle/fluid/tests/unittests/test_onnx_export.py
index cac464dc07..6cb4ed2fd9 100644
--- a/python/paddle/fluid/tests/unittests/test_onnx_export.py
+++ b/python/paddle/fluid/tests/unittests/test_onnx_export.py
@@ -12,14 +12,11 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import os
-import pickle
 import unittest
 import numpy as np
 import paddle
-from paddle.static import InputSpec
 
-from paddle.fluid.framework import in_dygraph_mode, _test_eager_guard
+from paddle.fluid.framework import _test_eager_guard
 
 
 class LinearNet(paddle.nn.Layer):
diff --git a/python/paddle/fluid/tests/unittests/test_op_function_generator.py b/python/paddle/fluid/tests/unittests/test_op_function_generator.py
index 441e77b455..a8e4e7d3e8 100644
--- a/python/paddle/fluid/tests/unittests/test_op_function_generator.py
+++ b/python/paddle/fluid/tests/unittests/test_op_function_generator.py
@@ -13,13 +13,12 @@
 # limitations under the License.
 
 import unittest
-from paddle.fluid.framework import default_main_program, Program, convert_np_dtype_to_dtype_, _non_static_mode, in_dygraph_mode
+from paddle.fluid.framework import in_dygraph_mode
 import paddle.fluid as fluid
 import paddle.fluid.layers as layers
-import paddle.fluid.core as core
 from paddle.fluid.dygraph.jit import TracedLayer
 import numpy as np
-from paddle import _C_ops, _legacy_C_ops
+from paddle import _legacy_C_ops
 
 
 class TestTracedLayer(fluid.dygraph.Layer):
diff --git a/python/paddle/fluid/tests/unittests/test_outer.py b/python/paddle/fluid/tests/unittests/test_outer.py
index d6040c298f..a887615f0f 100644
--- a/python/paddle/fluid/tests/unittests/test_outer.py
+++ b/python/paddle/fluid/tests/unittests/test_outer.py
@@ -18,7 +18,7 @@ import numpy as np
 
 import paddle
 from paddle.static import Program, program_guard
-from paddle.fluid.framework import _test_eager_guard, in_dygraph_mode
+from paddle.fluid.framework import _test_eager_guard
 
 
 class TestMultiplyApi(unittest.TestCase):
-- 
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