title: Unable to import AttentionLayer in Keras (TF1.13)
body: <p>I'm trying to import Attention layer for my encoder decoder model but it gives error.</p>
  
  <pre><code>from keras.layers import AttentionLayer
  </code></pre>
  
  <p>or</p>
  
  <pre><code>from keras.layers import Attention
  </code></pre>
  
  <p>following is the error<br>
  <code>cannot import name 'AttentionLayer' from 'keras.layers'</code><br>
  <code>cannot import name 'Attention' from 'keras.layers'</code><br>
  Any suggestons?</p>
  
  <hr>