title: Adding an array of tags to xml root
body: <p>I have an array of <strong>xml.etree.ElementTree.Element</strong>. i need to append it into root tag which contains few <strong>Tags</strong> (i.e) <strong>xml.etree.ElementTree.Element</strong></p>
  
  <p>for Example:</p>
  
  <pre><code>&lt;MxGraphModel&gt;
      &lt;root&gt;
         &lt;mxCell id="0"&gt;&lt;/mxCell&gt;
         &lt;mxCell id="1"&gt;&lt;/mxCell&gt;
      &lt;/root&gt;
  &lt;/MxGraphModel&gt;
  </code></pre>
  
  <p>My array <code>['&lt;mxCell id="3"&gt;&lt;/mxCell&gt;','&lt;mxCell id="4"&gt;&lt;/mxCell&gt;']</code></p>
  
  <p>My final output needs to be :</p>
  
  <pre><code>&lt;MxGraphModel&gt;
       &lt;root&gt;
          &lt;mxCell id="0"&gt;&lt;/mxCell&gt;
          &lt;mxCell id="1"&gt;&lt;/mxCell&gt;
          &lt;mxCell id="3"&gt;&lt;/mxCell&gt;
          &lt;mxCell id="4"&gt;&lt;/mxCell&gt;
       &lt;/root&gt;
  &lt;/MxGraphModel&gt;
  </code></pre>