title: Keras + tensorflow gives the error "no attribute 'control_flow_ops'"
body: <p>I am trying to run keras for the first time.  I installed the modules with:</p>
  
  <pre><code>pip install keras --user
  pip install tensorflow --user
  </code></pre>
  
  <p>and then tried to run <a href="https://github.com/fchollet/keras/blob/master/examples/mnist_cnn.py">https://github.com/fchollet/keras/blob/master/examples/mnist_cnn.py</a>.</p>
  
  <p>However it gives me:</p>
  
  <pre><code>AttributeError: 'module' object has no attribute 'control_flow_ops'
  </code></pre>
  
  <p>These are the versions I am using.</p>
  
  <pre><code>print tensorflow.__version__
  0.11.0rc0
  print keras.__version__
  1.1.0
  </code></pre>
  
  <blockquote>
    <p>What can I do to get keras to run with tensorflow?</p>
  </blockquote>