fix pylint warnings

example/lstm_aclImdb/imdb.py

@@ -18,8 +18,8 @@ imdb dataset parser.
 import os
 from itertools import chain
 
-import gensim
 import numpy as np
+import gensim
 
 
 class ImdbParser():

example/resnet50_imagenet2012_THOR/model/thor_layer.py

@@ -13,6 +13,8 @@
 # limitations under the License.
 # ============================================================================
 """thor_layer"""
+import numpy as np
+
 import mindspore as ms
 import mindspore.common.dtype as mstype
 from mindspore._checkparam import check_bool, twice, check_int_positive
@@ -23,7 +25,6 @@ from mindspore.common.tensor import Tensor
 from mindspore.nn.cell import Cell
 from mindspore.nn.layer.activation import get_activation
 from mindspore.ops import operations as P
-import numpy as np
 C0 = 16
 
 def caculate_device_shape(matrix_dim, channel, is_A):

example/resnet50_imagenet2012_THOR/train.py

@@ -17,6 +17,8 @@ import argparse
 import os
 import random
 
+import numpy as np
+
 from mindspore import Tensor
 from mindspore import context
 from mindspore.communication.management import init
@@ -28,7 +30,6 @@ from model.model_thor import Model
 from model.resnet import resnet50
 from model.thor import THOR
 
-import numpy as np
 from config import config
 from crossentropy import CrossEntropy
 from dataset_imagenet import create_dataset