code: def evaluation(self, evl):
          
          if isinstance(evl, str):
              evl = self.tags_evaluation.find(evl)
          if isinstance(evl, Tag):
              evl = SelectedTag(tag_id=evl.ident, tags=self.tags_evaluation)
          javabridge.call(self.jobject, "setEvaluation", "(Lweka/core/SelectedTag;)V", evl.jobject)
docs: Sets the statistic to use for evaluation.
  
          :param evl: the statistic
          :type evl: SelectedTag, Tag or str