title: How to extract data from dictionary in the list
body: <p>I'd like to obtain the data of dictionary in the list as follows.</p>
  
  <pre><code>list=[{"length": {"a": 0.05,"b": 0.04}, "id": "66"}]
  </code></pre>
  
  <p>How should I extract {"a": 0.05,"b": 0.04} and "66" from this list?</p>