title: How to append a list of Hex to one Hex number
body: <p>I have a list of hex bytes strings like this</p>
  
  <pre><code>['0xe1', '0xd7', '0x7', '0x0']
  </code></pre>
  
  <p>(as read from a binary file)</p>
  
  <p>I want to flip the list and append the list together to create one hex number,</p>
  
  <pre><code>['0x07D7E1']
  </code></pre>
  
  <p>How do I format the list to this format?</p>