docs: def write_post_script(self,fh):
      """
      Write the post script for the job, if there is one
      @param fh: descriptor of open DAG file.
      """
      if self.__post_script:
        fh.write( 'SCRIPT POST ' + str(self) + ' ' + self.__post_script + ' ' +
          ' '.join(self.__post_script_args) + '\n' )