cannot import name 'Layer' from 'keras.engine'

[falibabaei]

I want to add a custom attention layer to my model but when I run the code in
#15 (mzbac commented on Feb 8, 2018), I received the following error
cannot import name 'Layer' from 'keras.engine'
I think the problem is with importing Recurrent from keras.layers.recurrent
any suggestions to solve this issue?

[yuanphoenix]

Do you konw how to solve this problem？