code: def __set_rouge_dir(self, home_dir=None):
          
          if not home_dir:
              self._home_dir = self.__get_rouge_home_dir_from_settings()
          else:
              self._home_dir = home_dir
              self.save_home_dir()
          self._bin_path = os.path.join(self._home_dir, 'ROUGE-1.5.5.pl')
          self.data_dir = os.path.join(self._home_dir, 'data')
          if not os.path.exists(self._bin_path):
              raise Exception(
                  "ROUGE binary not found at {}. Please set the "
                  "correct path by running pyrouge_set_rouge_path "
                  "/path/to/rouge/home.".format(self._bin_path))
docs: Verfify presence of ROUGE-1.5.5.pl and data folder, and set
          those paths.