code: def _get_measures(self, et):
          
          list_of_measures = []
          for tag in et.findall("option"):
              if tag.attrib.get("value", "true") == "true":
                  list_of_measures.append(tag.attrib["name"])
          return list_of_measures
docs: Get a list of measures in <continuous> or <SurveyOptions> section