!6816 modify nasnet parallelmode

Merge pull request !6816 from panfengfeng/fix_nasnet_scripts

model_zoo/official/cv/nasnet/src/nasnet_a_mobile.py

@@ -23,7 +23,7 @@ import mindspore.ops.functional as F
 import mindspore.ops.composite as C
 import mindspore.common.dtype as mstype
 from mindspore.nn.wrap.grad_reducer import DistributedGradReducer
-from mindspore.train.parallel_utils import ParallelMode
+from mindspore.context import ParallelMode
 from mindspore.parallel._utils import _get_device_num, _get_parallel_mode, _get_gradients_mean
 
 

model_zoo/official/cv/nasnet/train.py

@@ -18,7 +18,7 @@ import os
 
 from mindspore import Tensor
 from mindspore import context
-from mindspore import ParallelMode
+from mindspore.context import ParallelMode
 from mindspore.communication.management import init, get_rank, get_group_size
 from mindspore.nn.optim.rmsprop import RMSProp
 from mindspore.train.callback import ModelCheckpoint, CheckpointConfig, LossMonitor, TimeMonitor