diff --git a/mindarmour/adv_robustness/attacks/attack.py b/mindarmour/adv_robustness/attacks/attack.py
index e138407..8a05bf1 100644
--- a/mindarmour/adv_robustness/attacks/attack.py
+++ b/mindarmour/adv_robustness/attacks/attack.py
@@ -49,11 +49,6 @@ class Attack:
 
         Returns:
             numpy.ndarray, generated adversarial examples
-
-        Examples:
-            >>> inputs = np.array([[0.2, 0.4, 0.5, 0.2], [0.7, 0.2, 0.4, 0.3]])
-            >>> labels = np.array([3, 0])
-            >>> advs = attack.batch_generate(inputs, labels, batch_size=2)
         """
         inputs_image, inputs, labels = check_inputs_labels(inputs, labels)
         arr_x = inputs
diff --git a/mindarmour/adv_robustness/attacks/black/genetic_attack.py b/mindarmour/adv_robustness/attacks/black/genetic_attack.py
index 69d7b0c..087d463 100644
--- a/mindarmour/adv_robustness/attacks/black/genetic_attack.py
+++ b/mindarmour/adv_robustness/attacks/black/genetic_attack.py
@@ -69,7 +69,6 @@ class GeneticAttack(Attack):
         c (Union[int, float]): Weight of perturbation loss. Default: 0.1.
 
     Examples:
-        >>> import numpy as np
         >>> import mindspore.ops.operations as M
         >>> from mindspore import Tensor
         >>> from mindspore.nn import Cell
diff --git a/mindarmour/adv_robustness/attacks/black/hop_skip_jump_attack.py b/mindarmour/adv_robustness/attacks/black/hop_skip_jump_attack.py
index b0038a4..22e41e1 100644
--- a/mindarmour/adv_robustness/attacks/black/hop_skip_jump_attack.py
+++ b/mindarmour/adv_robustness/attacks/black/hop_skip_jump_attack.py
@@ -75,7 +75,6 @@ class HopSkipJumpAttack(Attack):
         ValueError: If constraint not in ['l2', 'linf']
 
     Examples:
-        >>> import numpy as np
         >>> from mindspore import Tensor
         >>> from mindarmour import BlackModel
         >>> from mindarmour.adv_robustness.attacks import HopSkipJumpAttack
diff --git a/mindarmour/adv_robustness/attacks/black/natural_evolutionary_strategy.py b/mindarmour/adv_robustness/attacks/black/natural_evolutionary_strategy.py
index bcb0596..45e89b4 100644
--- a/mindarmour/adv_robustness/attacks/black/natural_evolutionary_strategy.py
+++ b/mindarmour/adv_robustness/attacks/black/natural_evolutionary_strategy.py
@@ -79,7 +79,6 @@ class NES(Attack):
             input labels are one-hot-encoded. Default: True.
 
     Examples:
-        >>> import numpy as np
         >>> from mindspore import Tensor
         >>> from mindarmour import BlackModel
         >>> from mindarmour.adv_robustness.attacks import NES
diff --git a/mindarmour/adv_robustness/attacks/black/pointwise_attack.py b/mindarmour/adv_robustness/attacks/black/pointwise_attack.py
index 4c9ccc5..1f33a6e 100644
--- a/mindarmour/adv_robustness/attacks/black/pointwise_attack.py
+++ b/mindarmour/adv_robustness/attacks/black/pointwise_attack.py
@@ -47,7 +47,6 @@ class PointWiseAttack(Attack):
             Default: True.
 
     Examples:
-        >>> import numpy as np
         >>> from mindspore import Tensor
         >>> from mindarmour import BlackModel
         >>> from mindarmour.adv_robustness.attacks import PointWiseAttack
diff --git a/mindarmour/adv_robustness/attacks/black/pso_attack.py b/mindarmour/adv_robustness/attacks/black/pso_attack.py
index b5ed105..a88fc4e 100644
--- a/mindarmour/adv_robustness/attacks/black/pso_attack.py
+++ b/mindarmour/adv_robustness/attacks/black/pso_attack.py
@@ -64,7 +64,6 @@ class PSOAttack(Attack):
             specifically for model_type='detection'. Reserve_ratio should be in the range of (0, 1). Default: 0.3.
 
     Examples:
-        >>> import numpy as np
         >>> import mindspore.nn as nn
         >>> from mindspore import Tensor
         >>> from mindspore.nn import Cell
diff --git a/mindarmour/adv_robustness/attacks/black/salt_and_pepper_attack.py b/mindarmour/adv_robustness/attacks/black/salt_and_pepper_attack.py
index 003f638..d6e1b1f 100644
--- a/mindarmour/adv_robustness/attacks/black/salt_and_pepper_attack.py
+++ b/mindarmour/adv_robustness/attacks/black/salt_and_pepper_attack.py
@@ -40,7 +40,6 @@ class SaltAndPepperNoiseAttack(Attack):
             Default: True.
 
     Examples:
-        >>> import numpy as np
         >>> from mindspore import Tensor
         >>> from mindarmour import BlackModel
         >>> from mindarmour.adv_robustness.attacks import SaltAndPepperNoiseAttack
diff --git a/mindarmour/adv_robustness/attacks/carlini_wagner.py b/mindarmour/adv_robustness/attacks/carlini_wagner.py
index 67c3a70..9843505 100644
--- a/mindarmour/adv_robustness/attacks/carlini_wagner.py
+++ b/mindarmour/adv_robustness/attacks/carlini_wagner.py
@@ -95,7 +95,6 @@ class CarliniWagnerL2Attack(Attack):
             input labels are onehot-coded. Default: True.
 
     Examples:
-        >>> import numpy as np
         >>> import mindspore.ops.operations as M
         >>> from mindspore.nn import Cell
         >>> from mindarmour.adv_robustness.attacks import CarliniWagnerL2Attack
diff --git a/mindarmour/adv_robustness/attacks/deep_fool.py b/mindarmour/adv_robustness/attacks/deep_fool.py
index 819a20d..9de6380 100644
--- a/mindarmour/adv_robustness/attacks/deep_fool.py
+++ b/mindarmour/adv_robustness/attacks/deep_fool.py
@@ -117,7 +117,6 @@ class DeepFool(Attack):
             input labels are onehot-coded. Default: True.
 
     Examples:
-        >>> import numpy as np
         >>> import mindspore.ops.operations as P
         >>> from mindspore.nn import Cell
         >>> from mindspore import Tensor
diff --git a/mindarmour/adv_robustness/attacks/gradient_method.py b/mindarmour/adv_robustness/attacks/gradient_method.py
index 5f033e1..685b02f 100644
--- a/mindarmour/adv_robustness/attacks/gradient_method.py
+++ b/mindarmour/adv_robustness/attacks/gradient_method.py
@@ -149,8 +149,6 @@ class FastGradientMethod(GradientMethod):
             is already equipped with loss function. Default: None.
 
     Examples:
-        >>> import numpy as np
-        >>> import mindspore.nn as nn
         >>> from mindspore.nn import Cell, SoftmaxCrossEntropyWithLogits
         >>> from mindarmour.adv_robustness.attacks import FastGradientMethod
         >>> class Net(Cell):
@@ -230,8 +228,6 @@ class RandomFastGradientMethod(FastGradientMethod):
         ValueError: eps is smaller than alpha!
 
     Examples:
-        >>> import numpy as np
-        >>> import mindspore.nn as nn
         >>> from mindspore.nn import Cell, SoftmaxCrossEntropyWithLogits
         >>> from mindarmour.adv_robustness.attacks import RandomFastGradientMethod
         >>> class Net(Cell):
@@ -285,8 +281,6 @@ class FastGradientSignMethod(GradientMethod):
             is already equipped with loss function. Default: None.
 
     Examples:
-        >>> import numpy as np
-        >>> import mindspore.nn as nn
         >>> from mindspore.nn import Cell, SoftmaxCrossEntropyWithLogits
         >>> from mindarmour.adv_robustness.attacks import FastGradientSignMethod
         >>> class Net(Cell):
@@ -362,8 +356,6 @@ class RandomFastGradientSignMethod(FastGradientSignMethod):
         ValueError: eps is smaller than alpha!
 
     Examples:
-        >>> import numpy as np
-        >>> import mindspore.nn as nn
         >>> from mindspore.nn import Cell, SoftmaxCrossEntropyWithLogits
         >>> from mindarmour.adv_robustness.attacks import RandomFastGradientSignMethod
         >>> class Net(Cell):
@@ -412,8 +404,6 @@ class LeastLikelyClassMethod(FastGradientSignMethod):
             is already equipped with loss function. Default: None.
 
     Examples:
-        >>> import numpy as np
-        >>> import mindspore.nn as nn
         >>> from mindspore.nn import Cell, SoftmaxCrossEntropyWithLogits
         >>> from mindarmour.adv_robustness.attacks import LeastLikelyClassMethod
         >>> class Net(Cell):
@@ -463,8 +453,6 @@ class RandomLeastLikelyClassMethod(FastGradientSignMethod):
         ValueError: eps is smaller than alpha!
 
     Examples:
-        >>> import numpy as np
-        >>> import mindspore.nn as nn
         >>> from mindspore.nn import Cell, SoftmaxCrossEntropyWithLogits
         >>> from mindarmour.adv_robustness.attacks import RandomLeastLikelyClassMethod
         >>> class Net(Cell):
diff --git a/mindarmour/adv_robustness/attacks/iterative_gradient_method.py b/mindarmour/adv_robustness/attacks/iterative_gradient_method.py
index d95e5a8..c3c15aa 100644
--- a/mindarmour/adv_robustness/attacks/iterative_gradient_method.py
+++ b/mindarmour/adv_robustness/attacks/iterative_gradient_method.py
@@ -178,8 +178,6 @@ class BasicIterativeMethod(IterativeGradientMethod):
             is already equipped with loss function. Default: None.
 
     Examples:
-        >>> import numpy as np
-        >>> import mindspore.nn as nn
         >>> from mindspore.ops import operations as P
         >>> from mindspore.nn import Cell, SoftmaxCrossEntropyWithLogits
         >>> from mindarmour.adv_robustness.attacks import BasicIterativeMethod
@@ -282,8 +280,6 @@ class MomentumIterativeMethod(IterativeGradientMethod):
             is already equipped with loss function. Default: None.
 
     Examples:
-        >>> import numpy as np
-        >>> import mindspore.nn as nn
         >>> from mindspore.ops import operations as P
         >>> from mindspore.nn import Cell, SoftmaxCrossEntropyWithLogits
         >>> from mindarmour.adv_robustness.attacks import MomentumIterativeMethod
@@ -428,8 +424,6 @@ class ProjectedGradientDescent(BasicIterativeMethod):
             is already equipped with loss function. Default: None.
 
     Examples:
-        >>> import numpy as np
-        >>> import mindspore.nn as nn
         >>> from mindspore.ops import operations as P
         >>> from mindspore.nn import Cell, SoftmaxCrossEntropyWithLogits
         >>> from mindarmour.adv_robustness.attacks import ProjectedGradientDescent
@@ -526,8 +520,6 @@ class DiverseInputIterativeMethod(BasicIterativeMethod):
             is already equipped with loss function. Default: None.
 
     Examples:
-        >>> import numpy as np
-        >>> import mindspore.nn as nn
         >>> from mindspore.ops import operations as P
         >>> from mindspore.nn import Cell, SoftmaxCrossEntropyWithLogits
         >>> from mindarmour.adv_robustness.attacks import DiverseInputIterativeMethod
@@ -583,8 +575,6 @@ class MomentumDiverseInputIterativeMethod(MomentumIterativeMethod):
             is already equipped with loss function. Default: None.
 
     Examples:
-        >>> import numpy as np
-        >>> import mindspore.nn as nn
         >>> from mindspore.ops import operations as P
         >>> from mindspore.nn import Cell, SoftmaxCrossEntropyWithLogits
         >>> from mindarmour.adv_robustness.attacks import MomentumDiverseInputIterativeMethod
diff --git a/mindarmour/adv_robustness/attacks/jsma.py b/mindarmour/adv_robustness/attacks/jsma.py
index a91750b..3101a3a 100644
--- a/mindarmour/adv_robustness/attacks/jsma.py
+++ b/mindarmour/adv_robustness/attacks/jsma.py
@@ -54,8 +54,6 @@ class JSMAAttack(Attack):
             input labels are onehot-coded. Default: True.
 
     Examples:
-        >>> import numpy as np
-        >>> import mindspore.nn as nn
         >>> from mindspore.nn import Cell
         >>> from mindarmour.adv_robustness.attacks import JSMAAttack
         >>> class Net(Cell):
diff --git a/mindarmour/adv_robustness/attacks/lbfgs.py b/mindarmour/adv_robustness/attacks/lbfgs.py
index 75783da..da8d5fd 100644
--- a/mindarmour/adv_robustness/attacks/lbfgs.py
+++ b/mindarmour/adv_robustness/attacks/lbfgs.py
@@ -54,7 +54,6 @@ class LBFGS(Attack):
             input labels are onehot-coded. Default: False.
 
     Examples:
-        >>> import numpy as np
         >>> from mindarmour.adv_robustness.attacks import LBFGS
         >>> from tests.ut.python.utils.mock_net import Net
         >>> net = Net()
diff --git a/mindarmour/adv_robustness/defenses/adversarial_defense.py b/mindarmour/adv_robustness/defenses/adversarial_defense.py
index a5dc204..1dbfc34 100644
--- a/mindarmour/adv_robustness/defenses/adversarial_defense.py
+++ b/mindarmour/adv_robustness/defenses/adversarial_defense.py
@@ -36,10 +36,8 @@ class AdversarialDefense(Defense):
         optimizer (Cell): Optimizer used to train the network. Default: None.
 
     Examples:
-        >>> import numpy as np
         >>> from mindspore.nn.optim.momentum import Momentum
         >>> from mindarmour.adv_robustness.defenses import AdversarialDefense
-        >>> from mindspore import nn
         >>> from tests.ut.python.utils.mock_net import Net
         >>> net = Net()
         >>> lr = 0.001
@@ -109,12 +107,10 @@ class AdversarialDefenseWithAttacks(AdversarialDefense):
         ValueError: If replace_ratio is not between 0 and 1.
 
     Examples:
-        >>> import numpy as np
         >>> from mindspore.nn.optim.momentum import Momentum
         >>> from mindarmour.adv_robustness.attacks import FastGradientSignMethod
         >>> from mindarmour.adv_robustness.attacks import ProjectedGradientDescent
         >>> from mindarmour.adv_robustness.defenses import AdversarialDefenseWithAttacks
-        >>> from mindspore import nn
         >>> from tests.ut.python.utils.mock_net import Net
         >>> net = Net()
         >>> lr = 0.001
@@ -157,9 +153,6 @@ class AdversarialDefenseWithAttacks(AdversarialDefense):
 
         Returns:
             numpy.ndarray, loss of adversarial defense operation.
-
-        Examples:
-            >>> adv_defense.defense(inputs, labels)
         """
         inputs, labels = check_pair_numpy_param('inputs', inputs, 'labels',
                                                 labels)
@@ -200,12 +193,10 @@ class EnsembleAdversarialDefense(AdversarialDefenseWithAttacks):
         ValueError: If replace_ratio is not between 0 and 1.
 
     Examples:
-        >>> import numpy as np
         >>> from mindspore.nn.optim.momentum import Momentum
         >>> from mindarmour.adv_robustness.attacks import FastGradientSignMethod
         >>> from mindarmour.adv_robustness.attacks import ProjectedGradientDescent
         >>> from mindarmour.adv_robustness.defenses import EnsembleAdversarialDefense
-        >>> from mindspore import nn
         >>> from tests.ut.python.utils.mock_net import Net
         >>> net = Net()
         >>> lr = 0.001
diff --git a/mindarmour/adv_robustness/defenses/natural_adversarial_defense.py b/mindarmour/adv_robustness/defenses/natural_adversarial_defense.py
index 2f666c0..111ddf6 100644
--- a/mindarmour/adv_robustness/defenses/natural_adversarial_defense.py
+++ b/mindarmour/adv_robustness/defenses/natural_adversarial_defense.py
@@ -36,10 +36,8 @@ class NaturalAdversarialDefense(AdversarialDefenseWithAttacks):
         eps (float): Step size of the attack method(FGSM). Default: 0.1.
 
     Examples:
-        >>> import numpy as np
         >>> from mindspore.nn.optim.momentum import Momentum
         >>> from mindarmour.adv_robustness.defenses import NaturalAdversarialDefense
-        >>> from mindspore import nn
         >>> from tests.ut.python.utils.mock_net import Net
         >>> net = Net()
         >>> lr = 0.001
diff --git a/mindarmour/adv_robustness/defenses/projected_adversarial_defense.py b/mindarmour/adv_robustness/defenses/projected_adversarial_defense.py
index 878b91e..19f7e39 100644
--- a/mindarmour/adv_robustness/defenses/projected_adversarial_defense.py
+++ b/mindarmour/adv_robustness/defenses/projected_adversarial_defense.py
@@ -41,10 +41,8 @@ class ProjectedAdversarialDefense(AdversarialDefenseWithAttacks):
         norm_level (str): Norm type. 'inf' or 'l2'. Default: 'inf'.
 
     Examples:
-        >>> import numpy as np
         >>> from mindspore.nn.optim.momentum import Momentum
         >>> from mindarmour.adv_robustness.defenses import ProjectedAdversarialDefense
-        >>> from mindspore import nn
         >>> from tests.ut.python.utils.mock_net import Net
         >>> net = Net()
         >>> lr = 0.001
diff --git a/mindarmour/adv_robustness/detectors/black/similarity_detector.py b/mindarmour/adv_robustness/detectors/black/similarity_detector.py
index 93c4d8d..4fed46f 100644
--- a/mindarmour/adv_robustness/detectors/black/similarity_detector.py
+++ b/mindarmour/adv_robustness/detectors/black/similarity_detector.py
@@ -73,11 +73,9 @@ class SimilarityDetector(Detector):
             Default: 0.001
 
     Examples:
-        >>> import numpy as np
         >>> from mindspore.ops.operations import Add
         >>> from mindspore.nn import Cell
         >>> from mindspore import Model
-        >>> from mindspore import context
         >>> from mindarmour.adv_robustness.detectors import SimilarityDetector
         >>> class EncoderNet(Cell):
         ...     def __init__(self, encode_dim):
diff --git a/mindarmour/adv_robustness/detectors/ensemble_detector.py b/mindarmour/adv_robustness/detectors/ensemble_detector.py
index 6b607ed..4fb95be 100644
--- a/mindarmour/adv_robustness/detectors/ensemble_detector.py
+++ b/mindarmour/adv_robustness/detectors/ensemble_detector.py
@@ -34,11 +34,9 @@ class EnsembleDetector(Detector):
         policy (str): Decision policy, could be 'vote', 'all' or 'any'.
             Default: 'vote'
     Examples:
-        >>> import numpy as np
         >>> from mindspore.ops.operations import Add
         >>> from mindspore.nn import Cell
         >>> from mindspore import Model
-        >>> from mindspore import context
         >>> from mindarmour.adv_robustness.detectors import ErrorBasedDetector
         >>> from mindarmour.adv_robustness.detectors import RegionBasedDetector
         >>> from mindarmour.adv_robustness.detectors import EnsembleDetector
diff --git a/mindarmour/adv_robustness/detectors/mag_net.py b/mindarmour/adv_robustness/detectors/mag_net.py
index 436879e..2944cae 100644
--- a/mindarmour/adv_robustness/detectors/mag_net.py
+++ b/mindarmour/adv_robustness/detectors/mag_net.py
@@ -48,11 +48,9 @@ class ErrorBasedDetector(Detector):
         bounds (tuple): (clip_min, clip_max). Default: (0.0, 1.0).
 
     Examples:
-        >>> import numpy as np
         >>> from mindspore.ops.operations import Add
         >>> from mindspore.nn import Cell
         >>> from mindspore import Model
-        >>> from mindspore import context
         >>> from mindarmour.adv_robustness.detectors import ErrorBasedDetector
         >>> class Net(Cell):
         ...     def __init__(self):
@@ -183,11 +181,9 @@ class DivergenceBasedDetector(ErrorBasedDetector):
             In form of (clip_min, clip_max). Default: (0.0, 1.0).
 
     Examples:
-        >>> import numpy as np
         >>> import mindspore.ops.operations as P
         >>> from mindspore.nn import Cell
         >>> from mindspore import Model
-        >>> from mindspore import context
         >>> from mindarmour.adv_robustness.detectors import DivergenceBasedDetector
         >>> class PredNet(Cell):
         ...     def __init__(self):
diff --git a/mindarmour/adv_robustness/detectors/region_based_detector.py b/mindarmour/adv_robustness/detectors/region_based_detector.py
index 20cb21f..a1bc603 100644
--- a/mindarmour/adv_robustness/detectors/region_based_detector.py
+++ b/mindarmour/adv_robustness/detectors/region_based_detector.py
@@ -52,11 +52,9 @@ class RegionBasedDetector(Detector):
             input labels are one-hot-encoded. Default: False.
 
     Examples:
-        >>> import numpy as np
         >>> from mindspore.ops.operations import Add
         >>> from mindspore.nn import Cell
         >>> from mindspore import Model
-        >>> from mindspore import context
         >>> from mindarmour.adv_robustness.detectors import RegionBasedDetector
         >>> class Net(Cell):
         ...     def __init__(self):
diff --git a/mindarmour/adv_robustness/detectors/spatial_smoothing.py b/mindarmour/adv_robustness/detectors/spatial_smoothing.py
index bc43a0c..91a788d 100644
--- a/mindarmour/adv_robustness/detectors/spatial_smoothing.py
+++ b/mindarmour/adv_robustness/detectors/spatial_smoothing.py
@@ -49,11 +49,9 @@ class SpatialSmoothing(Detector):
             benign samples. Default: 0.05.
 
     Examples:
-        >>> import numpy as np
         >>> import mindspore.ops.operations as P
         >>> from mindspore.nn import Cell
         >>> from mindspore import Model
-        >>> from mindspore import context
         >>> from mindarmour.adv_robustness.detectors import SpatialSmoothing
         >>> class Net(Cell):
         ...     def __init__(self):
diff --git a/mindarmour/adv_robustness/evaluations/attack_evaluation.py b/mindarmour/adv_robustness/evaluations/attack_evaluation.py
index ebf449f..5085b2c 100644
--- a/mindarmour/adv_robustness/evaluations/attack_evaluation.py
+++ b/mindarmour/adv_robustness/evaluations/attack_evaluation.py
@@ -47,7 +47,6 @@ class AttackEvaluate:
         ValueError: If target_label is None when targeted is True.
 
     Examples:
-        >>> import numpy as np
         >>> from mindarmour.adv_robustness.evaluations import AttackEvaluate
         >>> x = np.random.normal(size=(3, 512, 512, 3))
         >>> adv_x = np.random.normal(size=(3, 512, 512, 3))
diff --git a/mindarmour/adv_robustness/evaluations/black/defense_evaluation.py b/mindarmour/adv_robustness/evaluations/black/defense_evaluation.py
index 84e6cf9..1b73bae 100644
--- a/mindarmour/adv_robustness/evaluations/black/defense_evaluation.py
+++ b/mindarmour/adv_robustness/evaluations/black/defense_evaluation.py
@@ -57,7 +57,6 @@ class BlackDefenseEvaluate:
         max_queries (int): Attack budget, the maximum number of queries.
 
     Examples:
-        >>> import numpy as np
         >>> from mindarmour.adv_robustness.evaluations import BlackDefenseEvaluate
         >>> raw_preds = np.array([[0.1, 0.1, 0.2, 0.6],
         ...                       [0.1, 0.7, 0.0, 0.2],
diff --git a/mindarmour/adv_robustness/evaluations/defense_evaluation.py b/mindarmour/adv_robustness/evaluations/defense_evaluation.py
index e0b5839..cf2085b 100644
--- a/mindarmour/adv_robustness/evaluations/defense_evaluation.py
+++ b/mindarmour/adv_robustness/evaluations/defense_evaluation.py
@@ -39,9 +39,7 @@ class DefenseEvaluate:
             one-dimension array whose size is raw_preds.shape[0].
 
     Examples:
-        >>> import numpy as np
         >>> from mindarmour.adv_robustness.evaluations import DefenseEvaluate
-
         >>> raw_preds = np.array([[0.1, 0.1, 0.2, 0.6],
         ...                       [0.1, 0.7, 0.0, 0.2],
         ...                       [0.8, 0.1, 0.0, 0.1]])
diff --git a/mindarmour/adv_robustness/evaluations/visual_metrics.py b/mindarmour/adv_robustness/evaluations/visual_metrics.py
index 639b57b..ac8ae01 100644
--- a/mindarmour/adv_robustness/evaluations/visual_metrics.py
+++ b/mindarmour/adv_robustness/evaluations/visual_metrics.py
@@ -46,7 +46,6 @@ class RadarMetric:
         ValueError: If scale not in ['hide', 'norm', 'sparse', 'dense'].
 
     Examples:
-        >>> import numpy as np
         >>> from mindarmour.adv_robustness.evaluations import RadarMetric
         >>> metrics_name = ['MR', 'ACAC', 'ASS', 'NTE', 'ACTC']
         >>> def_metrics = [0.9, 0.85, 0.6, 0.7, 0.8]
diff --git a/mindarmour/privacy/diff_privacy/mechanisms/mechanisms.py b/mindarmour/privacy/diff_privacy/mechanisms/mechanisms.py
index e4e5ecf..4d302c4 100644
--- a/mindarmour/privacy/diff_privacy/mechanisms/mechanisms.py
+++ b/mindarmour/privacy/diff_privacy/mechanisms/mechanisms.py
@@ -34,7 +34,12 @@ TAG = 'NoiseMechanism'
 
 
 class ClipMechanismsFactory:
-    """ Factory class of clip mechanisms"""
+    """
+    Factory class of clip mechanisms
+
+    For details, please check `Tutorial <https://mindspore.cn/mindarmour/docs/zh-CN/master/protect_user_privacy_with_differential_privacy.html#%E5%B7%AE%E5%88%86%E9%9A%90%E7%A7%81>`_
+
+    """
 
     def __init__(self):
         pass
@@ -63,6 +68,9 @@ class ClipMechanismsFactory:
             Mechanisms, class of noise generated Mechanism.
 
         Examples:
+            >>> from mindspore import Tensor
+            >>> from mindspore.common import dtype as mstype
+            >>> from mindarmour.privacy.diff_privacy import ClipMechanismsFactory
             >>> decay_policy = 'Linear'
             >>> beta = Tensor(0.5, mstype.float32)
             >>> norm_bound = Tensor(1.0, mstype.float32)
@@ -71,10 +79,10 @@ class ClipMechanismsFactory:
             >>> target_unclipped_quantile = 0.9
             >>> clip_mechanism = ClipMechanismsFactory()
             >>> ada_clip = clip_mechanism.create('Gaussian',
-            ...                          decay_policy=decay_policy,
-            ...                          learning_rate=learning_rate,
-            ...                          target_unclipped_quantile=target_unclipped_quantile,
-            ...                          fraction_stddev=beta_stddev)
+            ...                                  decay_policy=decay_policy,
+            ...                                  learning_rate=learning_rate,
+            ...                                  target_unclipped_quantile=target_unclipped_quantile,
+            ...                                  fraction_stddev=beta_stddev)
             >>> next_norm_bound = ada_clip(beta, norm_bound)
 
         """
@@ -86,8 +94,11 @@ class ClipMechanismsFactory:
 
 
 class NoiseMechanismsFactory:
-    """ Factory class of noise mechanisms"""
+    """ Factory class of noise mechanisms
+
+    For details, please check `Tutorial <https://mindspore.cn/mindarmour/docs/zh-CN/master/protect_user_privacy_with_differential_privacy.html#%E5%B7%AE%E5%88%86%E9%9A%90%E7%A7%81>`_
 
+    """
     def __init__(self):
         pass
 
@@ -117,34 +128,13 @@ class NoiseMechanismsFactory:
             Mechanisms, class of noise generated Mechanism.
 
         Examples:
+            >>> from mindarmour.privacy.diff_privacy import NoiseMechanismsFactory
             >>> norm_bound = 1.0
             >>> initial_noise_multiplier = 1.0
-            >>> network = LeNet5()
-            >>> batch_size = 32
-            >>> batches = 128
-            >>> epochs = 1
-            >>> loss = nn.SoftmaxCrossEntropyWithLogits(sparse=True)
-            >>> noise_mech = NoiseMechanismsFactory().create('Gaussian',
-            ...                                              norm_bound=norm_bound,
-            ...                                              initial_noise_multiplier=initial_noise_multiplier)
-            >>> clip_mech = ClipMechanismsFactory().create('Gaussian',
-            ...                                            decay_policy='Linear',
-            ...                                            learning_rate=0.001,
-            ...                                            target_unclipped_quantile=0.9,
-            ...                                            fraction_stddev=0.01)
-            >>> net_opt = nn.Momentum(network.trainable_params(), learning_rate=0.1,
-            ...                       momentum=0.9)
-            >>> model = DPModel(micro_batches=2,
-            ...                 clip_mech=clip_mech,
-            ...                 norm_bound=norm_bound,
-            ...                 noise_mech=noise_mech,
-            ...                 network=network,
-            ...                 loss_fn=loss,
-            ...                 optimizer=net_opt,
-            ...                 metrics=None)
-            >>> ms_ds = ds.GeneratorDataset(dataset_generator,
-            ...                             ['data', 'label'])
-            >>> model.train(epochs, ms_ds, dataset_sink_mode=False)
+            >>> noise_mechanism = NoiseMechanismsFactory()
+            >>> clip = noise_mechanism.create('Gaussian',
+            ...                               norm_bound=norm_bound,
+            ...                               initial_noise_multiplier=initial_noise_multiplier)
         """
         if mech_name == 'Gaussian':
             return NoiseGaussianRandom(norm_bound=norm_bound,
@@ -192,6 +182,9 @@ class NoiseGaussianRandom(_Mechanisms):
         Tensor, generated noise with shape like given gradients.
 
     Examples:
+        >>> from mindspore import Tensor
+        >>> from mindspore.common import dtype as mstype
+        >>> from mindarmour.privacy.diff_privacy import NoiseGaussianRandom
         >>> gradients = Tensor([0.2, 0.9], mstype.float32)
         >>> norm_bound = 0.1
         >>> initial_noise_multiplier = 1.0
@@ -199,7 +192,6 @@ class NoiseGaussianRandom(_Mechanisms):
         >>> decay_policy = None
         >>> net = NoiseGaussianRandom(norm_bound, initial_noise_multiplier, seed, decay_policy)
         >>> res = net(gradients)
-        >>> print(res)
     """
 
     def __init__(self, norm_bound=1.0, initial_noise_multiplier=1.0, seed=0, decay_policy=None):
@@ -259,6 +251,9 @@ class NoiseAdaGaussianRandom(NoiseGaussianRandom):
         Tensor, generated noise with shape like given gradients.
 
     Examples:
+        >>> from mindspore import Tensor
+        >>> from mindspore.common import dtype as mstype
+        >>> from mindarmour.privacy.diff_privacy import NoiseAdaGaussianRandom
         >>> gradients = Tensor([0.2, 0.9], mstype.float32)
         >>> norm_bound = 1.0
         >>> initial_noise_multiplier = 1.0
@@ -267,7 +262,6 @@ class NoiseAdaGaussianRandom(NoiseGaussianRandom):
         >>> decay_policy = "Exp"
         >>> net = NoiseAdaGaussianRandom(norm_bound, initial_noise_multiplier, seed, noise_decay_rate, decay_policy)
         >>> res = net(gradients)
-        >>> print(res)
     """
 
     def __init__(self, norm_bound=1.0, initial_noise_multiplier=1.0, seed=0, noise_decay_rate=6e-6, decay_policy='Exp'):
@@ -379,6 +373,9 @@ class AdaClippingWithGaussianRandom(Cell):
         Tensor, undated norm clip .
 
     Examples:
+        >>> from mindspore import Tensor
+        >>> from mindspore.common import dtype as mstype
+        >>> from mindarmour.privacy.diff_privacy import AdaClippingWithGaussianRandom
         >>> decay_policy = 'Linear'
         >>> beta = Tensor(0.5, mstype.float32)
         >>> norm_bound = Tensor(1.0, mstype.float32)
diff --git a/mindarmour/privacy/diff_privacy/monitor/monitor.py b/mindarmour/privacy/diff_privacy/monitor/monitor.py
index 62449c1..1be43a0 100644
--- a/mindarmour/privacy/diff_privacy/monitor/monitor.py
+++ b/mindarmour/privacy/diff_privacy/monitor/monitor.py
@@ -38,6 +38,8 @@ class PrivacyMonitorFactory:
         """
         Create a privacy monitor class.
 
+        For details, please check `Tutorial <https://mindspore.cn/mindarmour/docs/zh-CN/master/protect_user_privacy_with_differential_privacy.html#%E5%B7%AE%E5%88%86%E9%9A%90%E7%A7%81>`_
+
         Args:
             policy (str): Monitor policy, 'rdp' and 'zcdp' are supported
                 by now. If policy is 'rdp', the monitor will compute the
@@ -55,8 +57,8 @@ class PrivacyMonitorFactory:
             Callback, a privacy monitor.
 
         Examples:
-            >>> rdp = PrivacyMonitorFactory.create(policy='rdp',
-            >>> num_samples=60000, batch_size=32)
+            >>> from mindarmour.privacy.diff_privacy import PrivacyMonitorFactory
+            >>> rdp = PrivacyMonitorFactory.create(policy='rdp', num_samples=60000, batch_size=32)
         """
         if policy == 'rdp':
             return RDPMonitor(*args, **kwargs)
@@ -72,6 +74,8 @@ class RDPMonitor(Callback):
     mechanism is said to have ε'-Renyi differential privacy of order α, it
     also satisfies conventional differential privacy (ε, δ) as below:
 
+    For details, please check `Tutorial <https://mindspore.cn/mindarmour/docs/zh-CN/master/protect_user_privacy_with_differential_privacy.html#%E5%B7%AE%E5%88%86%E9%9A%90%E7%A7%81>`_
+
     .. math::
         (ε'+\frac{log(1/δ)}{α-1}, δ)
 
@@ -114,20 +118,8 @@ class RDPMonitor(Callback):
             to device after each step training. Default: False.
 
     Examples:
-        >>> network = Net()
-        >>> net_loss = nn.SoftmaxCrossEntropyWithLogits()
-        >>> epochs = 2
-        >>> norm_clip = 1.0
-        >>> initial_noise_multiplier = 1.5
-        >>> mech = NoiseMechanismsFactory().create('AdaGaussian',
-        >>> norm_bound=norm_clip, initial_noise_multiplier=initial_noise_multiplier)
-        >>> net_opt = nn.Momentum(network.trainable_params(), 0.01, 0.9)
-        >>> model = DPModel(micro_batches=2, norm_clip=norm_clip,
-        >>> mech=mech, network=network, loss_fn=loss, optimizer=net_opt, metrics=None)
-        >>> rdp = PrivacyMonitorFactory.create(policy='rdp',
-        >>> num_samples=60000, batch_size=256,
-        >>> initial_noise_multiplier=initial_noise_multiplier)
-        >>> model.train(epochs, ds, callbacks=[rdp], dataset_sink_mode=False)
+        >>> from mindarmour.privacy.diff_privacy import PrivacyMonitorFactory
+        >>> rdp = PrivacyMonitorFactory.create(policy='rdp', num_samples=100, batch_size=32)
     """
 
     def __init__(self, num_samples, batch_size, initial_noise_multiplier=1.5,
@@ -206,8 +198,7 @@ class RDPMonitor(Callback):
             int, the recommended maximum training epochs.
 
         Examples:
-            >>> rdp = PrivacyMonitorFactory.create(policy='rdp',
-            >>> num_samples=60000, batch_size=32)
+            >>> rdp = PrivacyMonitorFactory.create(policy='rdp', num_samples=100, batch_size=32)
             >>> suggest_epoch = rdp.max_epoch_suggest()
         """
         if self._target_delta is not None and self._max_eps is None:
@@ -376,6 +367,8 @@ class ZCDPMonitor(Callback):
     if a randomized mechanism is said to have ρ-ｚCDP, it also satisfies
     conventional differential privacy (ε, δ) as below:
 
+    For details, please check `Tutorial <https://mindspore.cn/mindarmour/docs/zh-CN/master/protect_user_privacy_with_differential_privacy.html#%E5%B7%AE%E5%88%86%E9%9A%90%E7%A7%81>`_
+
     .. math::
         (ρ+２\sqrt{ρ*log(1/δ)}, δ)
 
@@ -407,20 +400,11 @@ class ZCDPMonitor(Callback):
             to device after each step training. Default: False.
 
     Examples:
-        >>> network = Net()
-        >>> net_loss = nn.SoftmaxCrossEntropyWithLogits()
-        >>> epochs = 2
-        >>> norm_clip = 1.0
-        >>> initial_noise_multiplier = 1.5
-        >>> mech = NoiseMechanismsFactory().create('AdaGaussian',
-        >>> norm_bound=norm_clip, initial_noise_multiplier=initial_noise_multiplier)
-        >>> net_opt = nn.Momentum(network.trainable_params(), 0.01, 0.9)
-        >>> model = DPModel(micro_batches=2, norm_clip=norm_clip,
-        >>> mech=mech, network=network, loss_fn=loss, optimizer=net_opt, metrics=None)
+        >>> from mindarmour.privacy.diff_privacy import PrivacyMonitorFactory
         >>> zcdp = PrivacyMonitorFactory.create(policy='zcdp',
-        >>> num_samples=60000, batch_size=256,
-        >>> initial_noise_multiplier=initial_noise_multiplier)
-        >>> model.train(epochs, ds, callbacks=[zcdp], dataset_sink_mode=False)
+        ...                                     num_samples=100,
+        ...                                     batch_size=32,
+        ...                                     initial_noise_multiplier=1.5)
     """
 
     def __init__(self, num_samples, batch_size, initial_noise_multiplier=1.5,
diff --git a/mindarmour/privacy/diff_privacy/optimizer/optimizer.py b/mindarmour/privacy/diff_privacy/optimizer/optimizer.py
index 8927a5f..a2b6d39 100644
--- a/mindarmour/privacy/diff_privacy/optimizer/optimizer.py
+++ b/mindarmour/privacy/diff_privacy/optimizer/optimizer.py
@@ -62,6 +62,9 @@ class DPOptimizerClassFactory:
         Optimizer, Optimizer class.
 
     Examples:
+        >>> from mindarmour.privacy.diff_privacy import DPOptimizerClassFactory
+        >>> from tests.ut.python.utils.mock_net import Net
+        >>> network = Net()
         >>> GaussianSGD = DPOptimizerClassFactory(micro_batches=2)
         >>> GaussianSGD.set_mechanisms('Gaussian', norm_bound=1.0, initial_noise_multiplier=1.5)
         >>> net_opt = GaussianSGD.create('Momentum')(params=network.trainable_params(),
diff --git a/mindarmour/privacy/diff_privacy/train/model.py b/mindarmour/privacy/diff_privacy/train/model.py
index b145b32..f304553 100644
--- a/mindarmour/privacy/diff_privacy/train/model.py
+++ b/mindarmour/privacy/diff_privacy/train/model.py
@@ -69,6 +69,8 @@ class DPModel(Model):
     """
     This class is overload mindspore.train.model.Model.
 
+    For details, please check `Tutorial <https://mindspore.cn/mindarmour/docs/zh-CN/master/protect_user_privacy_with_differential_privacy.html#%E5%B7%AE%E5%88%86%E9%9A%90%E7%A7%81>`_
+
     Args:
         micro_batches (int): The number of small batches split from an original
             batch. Default: 2.
@@ -83,37 +85,6 @@ class DPModel(Model):
         ValueError: If DPOptimizer and noise_mecn are both None or not None.
         ValueError: If noise_mech or DPOtimizer's mech method is adaptive while clip_mech is not None.
 
-    Examples:
-        >>> norm_bound = 1.0
-        >>> initial_noise_multiplier = 0.01
-        >>> network = LeNet5()
-        >>> batch_size = 32
-        >>> batches = 128
-        >>> epochs = 1
-        >>> micro_batches = 2
-        >>> loss = nn.SoftmaxCrossEntropyWithLogits(sparse=True)
-        >>> factory_opt = DPOptimizerClassFactory(micro_batches=micro_batches)
-        >>> factory_opt.set_mechanisms('Gaussian',
-        ...                            norm_bound=norm_bound,
-        ...                            initial_noise_multiplier=initial_noise_multiplier)
-        >>> net_opt = factory_opt.create('Momentum')(network.trainable_params(),
-        ...                                          learning_rate=0.1, momentum=0.9)
-        >>> clip_mech = ClipMechanismsFactory().create('Gaussian',
-        ...                                            decay_policy='Linear',
-        ...                                            learning_rate=0.01,
-        ...                                            target_unclipped_quantile=0.9,
-        ...                                            fraction_stddev=0.01)
-        >>> model = DPModel(micro_batches=micro_batches,
-        ...                 norm_bound=norm_bound,
-        ...                 clip_mech=clip_mech,
-        ...                 noise_mech=None,
-        ...                 network=network,
-        ...                 loss_fn=loss,
-        ...                 optimizer=net_opt,
-        ...                 metrics=None)
-        >>> ms_ds = ds.GeneratorDataset(dataset_generator,
-        ...                             ['data', 'label'])
-        >>> model.train(epochs, ms_ds, dataset_sink_mode=False)
     """
 
     def __init__(self, micro_batches=2, norm_bound=1.0, noise_mech=None,