title: change xml element text using xml.etree.ElementTree
body: <p>Given a parsed xml string:</p>
  
  <pre><code>tree = xml.etree.ElementTree.fromstring(xml_string)
  </code></pre>
  
  <p>How would you change an element's text from 'hats': </p>
  
  <pre><code>&gt;&gt;&gt; tree.find("path/to/element").text
  &gt;&gt;&gt; 'hats'
  </code></pre>
  
  <p>to 'cats'?</p>