lass="pre">
          std
         </span>
         <span class="pre">
          =
         </span>
         <span class="pre">
          [0.229,
         </span>
         <span class="pre">
          0.224,
         </span>
         <span class="pre">
          0.225]
         </span>
        </code>
        .
       </p>
       <p>
        Here’s a sample execution.
       </p>
       <div class="nbinput docutils container">
        <div class="prompt highlight-none notranslate">
         <div class="hi