title: Count elements from json using robot framework
body: <p>How to count no of element from json response. I would like to count number of id occurrence from below response :</p>
  
  <pre><code>{ "scores": [
      {
        "id": 1,
        "value": "100"
      },
      {
        "id": 2,
        "value": "77"
      },
      {
        "id": 3,
        "value": "96"
      }]}
  </code></pre>