code: def __set_dir_properties(self):
          
          directories = [
              ("home", "The ROUGE home directory."),
              ("data", "The path of the ROUGE 'data' directory."),
              ("system", "Path of the directory containing system summaries."),
              ("model", "Path of the directory containing model summaries."),
              ]
          for (dirname, docstring) in directories:
              self.__create_dir_property(dirname, docstring)
docs: Automatically generate the properties for directories.