code: def resource_as_xml(self, resource):
          
          e = self.resource_etree_element(resource)
          if (sys.version_info >= (3, 0)):
              # python3.x
              return(tostring(e, encoding='unicode', method='xml'))
          elif (sys.version_info >= (2, 7)):
              s = tostring(e, encoding='UTF-8', method='xml')
          else:
              # must not specify method='xml' in python2.6
              s = tostring(e, encoding='UTF-8')
          # Chop off XML declaration that is added in 2.x... sigh
          return(s.replace("<?xml version='1.0' encoding='UTF-8'?>\n", ''))
docs: Return string for the resource as part of an XML sitemap.
  
          Returns a string with the XML snippet representing the resource,
          without any XML declaration.