[Keras] 错误之AttributeError: ‘Node‘ object has no attribute ‘output_masks‘

使用Keras时，如果混合使用Keras和tensorflow.keras，并从不同的来源导入不同的模块混用，可能导致该错误，毕竟这俩不完全一样。例如：

# 导致出错
from tensorflow.keras.optimizers import Adam 
from keras.utils import multi_gpu_model

# 正常执行
from tensorflow.keras.optimizers import Adam
from tensorflow.keras.utils import multi_gpu_model

错误提示类似：

 Traceback (most recent call last):
  File "/home/guillaume/Documents/Allianz/ConstatOrNotConstatv3/train_network.py",      line 109, in 
    model = LeNet.build(width=100, height=100, depth=3, classes=5)
  File "/home/guillaume/Documents/Allianz/ConstatOrNotConstatv3/lenet.py", line 39,    in build
    output = model(pretrainedOutput)
  File "/usr/local/lib/python3.6/dist-packages/keras/engine/base_layer.py", line 443, in __call__
    previous_mask = _collect_previous_mask(inputs)
  File "/usr/local/lib/python3.6/dist-packages/keras/engine/base_layer.py", line 1311, in _collect_previous_mask
mask = node.output_masks[tensor_index]
  AttributeError: 'Node' object has no attribute 'output_masks'

如果想解决该错误就是完全用Keras或完全用tensorflow.keras。

参考：

1、AttributeError: 'Node' object has no attribute 'output_masks'

2、https://blog.csdn.net/qq_30638831/article/details/84193517