title: 'float' object has no attribute 'round'
body: <p>I have a code was shown below:</p>
  <pre><code>history['test_acc'].append(results.history['val_dense_5_accuracy'][0]) 
  </code></pre>
  <p>then I want to print like below:</p>
  <pre><code> print('Epoch: '+str(epoch)+'/'+str(epochs-1), 'Learning rate:', 
        'Test_acc:', history['test_acc'][-1].round(4),
        'Test_loss:', history['test_loss'][-1].round(4))`
  </code></pre>
  <p>but in this this line:</p>
  <pre><code>'Test_acc:', history['test_acc'][-1].round(4)
  </code></pre>
  <p>i have this error: 'float' object has no attribute 'round'
  what's the problem?</p>