title: AttributeError: module 'keras.engine' has no attribute 'input_layer'
body: <p>I am trying to use google colab!</p>
  
  <p>But I keep running into the problem with keras where it says:
  AttributeError: module 'keras.engine' has no attribute 'input_layer'</p>
  
  <p>However, checking their github library, there is a input_layer.py within keras/engine.</p>
  
  <p>Also, this works locally, just not on google colab.</p>
  
  <p>Any ideas?</p>