title: Getting Test Accuracy for model.predict_generator
body: <p>I am calling <code>model.predict_generator()</code> method for predictions on Test data-set. My question is how can I retrieve test accuracy ? Following is my code line:</p>
  
  <pre><code>predictions = model.predict_generator(test_images, steps=3,  verbose=0)
  </code></pre>
  
  <p>Where <code>test_iamges</code> in the parameter of <code>predict_generator</code> function has batch data retrieved from local disk by calling <code>ImageDataGenerator</code> </p>
  
  <p>Any guidance will be highly appreciated.</p>
  
  <p>Thanks</p>