title: Keras, output of model predict_proba
body: <p>In the <a href="https://keras.io/models/sequential/#sequential-model-methods" rel="nofollow noreferrer">docs</a>, the <code>predict_proba(self, x, batch_size=32, verbose=1)</code> is </p>
  
  <blockquote>
    <p>Generates class probability predictions for the input samples batch by batch.</p>
  </blockquote>
  
  <p>and returns </p>
  
  <blockquote>
    <p>A Numpy array of probability predictions.</p>
  </blockquote>
  
  <p>Suppose my model is binary classification model, does the output is <code>[a, b]</code>, for <code>a</code> is probability of <code>class_0</code>, and <code>b</code> is the probability of <code>class_1</code>?</p>