code: def xpath_evaluator(self, namespaces=None, regexp=False, smart_strings=True):
          u
          return etree.XPathEvaluator(
              self._xml,
              namespaces=namespaces,
              regexp=regexp,
              smart_strings=smart_strings
          )
docs: u"""Creates an XPathEvaluator instance for an ElementTree or an Element.
  
          :returns: ``XPathEvaluator`` instance