code: def get_etree_root(doc, encoding=None):
      
      tree = get_etree(doc, encoding)
      root = tree.getroot()
  
      return root
docs: Returns an instance of lxml.etree._Element for the given `doc` input.
  
      Args:
          doc: The input XML document. Can be an instance of
              ``lxml.etree._Element``, ``lxml.etree._ElementTree``, a file-like
              object, or a string filename.
          encoding: The character encoding of `doc`. If ``None``, an attempt
              will be made to determine the character encoding by the XML
              parser.
  
      Returns:
          An ``lxml.etree._Element`` instance for `doc`.
  
      Raises:
          IOError: If `doc` cannot be found.
          lxml.ParseError: If `doc` is a malformed XML document.