title: Set Training to False for Validation Data Used in Keras Fit Generator Function
body: <p>How do I set <code>training</code> to <code>False</code> for the <code>validation_data</code> used in Keras <code>fit_generator</code>? I have <code>Dropout</code> layers in my model and I want training to be <code>True</code> during training, and <code>False</code> during validation and testing.</p>