title: what does example,= mnist_train.take(1)?
body: <p>I not understand what does the ,= operator in this case, can anyone explain me what is the meaning of that?</p>
  
  <pre class="lang-py prettyprint-override"><code>mnist_dataset = tfds.load("mnist")
  mnist_train = mnist_dataset["train"]
  
  example,= mnist_train.take(1)
  </code></pre>