title: python lxml xml.etree.ElementTree.Element to string will not convert
body: <pre><code>    type(ikePanProfiles)
      &lt;class 'xml.etree.ElementTree.Element'&gt;
  
      etree.tostring(ikePanProfiles)
      Traceback (most recent call last):
       File "&lt;input&gt;", line 1, in &lt;module&gt;
       File "src/lxml/etree.pyx", line 3367, in lxml.etree.tostring 
      (src/lxml/etree.c:82622)
      TypeError: Type 'Element' cannot be serialized.
  </code></pre>
  
  <p>I'm accessing an API that responds in kind with an object type of "xml.etree.ElementTree.Element" So I'm not sure how to covert this tostring?</p>