code: def get_analysis_element(self, element, sep='|'):
          
          return [self.__get_key(word[ANALYSIS], element, sep) for word in self.words]
docs: The list of analysis elements of ``words`` layer.
  
          Parameters
          ----------
          element: str
              The name of the element, for example "lemma", "postag".
          sep: str
              The separator for ambiguous analysis (default: "|").
              As morphological analysis cannot always yield unambiguous results, we
              return ambiguous values separated by the pipe character as default.