title: Ordering an array by value
body: <p>I have this array :</p>
  <pre><code>a = [{'id': 1, 'date: '2020-01-31'}, {'id': 2, 'date': '2020-01-25'}, {'id': 3, 'date': '2020-01-26'}]
  </code></pre>
  <p>I would like to order it by date like that :</p>
  <pre><code>a = [{'id': 2, 'date': '2020-01-25'}, {'id': 3, 'date': '2020-01-26'}, {'id': 3, 'date'; '2020-01-31'}]
  </code></pre>
  <p>How can I do this to sort my array like that ?</p>
  <p>Thank you very much !</p>