docs: def __scripts(self, filestem):
          """
          Generates the required scripts.
          """
          script_construct = open('%s/%s' % (self.tmpdir, RSD.CONSTRUCT), 'w')
          script_save = open('%s/%s' % (self.tmpdir, RSD.SAVE), 'w')
          script_subgroups = open('%s/%s' % (self.tmpdir, RSD.SUBGROUPS), 'w')
  
          # Permit the owner to execute and read this script
          for fn in RSD.SCRIPTS:
              os.chmod('%s/%s' % (self.tmpdir, fn), S_IREAD | S_IEXEC)
  
          # Writes one line of script
          new_script = lambda script: lambda x: script.write(x + '\n')
  
          #
          # 'Construction' script
          #
          w = new_script(script_construct)
          w(':- initialization(main).')
          w('main :-')
          w('[featurize],')
          w('r(%s),' % filestem)
          w('w.')
          script_construct.close()
  
          #
          # 'Saving' script
          #
          w = new_script(script_save)
          w(':- initialization(main).')
          w('main :-')
          w('[process],')
          w('r(%s),' % filestem)
          w('w,')
          w('w(weka, %s),' % filestem)
          w('w(rsd, %s).' % filestem)
          script_save.close()
  
          #
          # 'Subgroups' script
          #
          w = new_script(script_subgroups)
          w(':- initialization(main).')
          w('main :-')
          w('[rules],')
          w('r(%s),' % filestem)
          w('i,')
          w('w.')
          script_subgroups.close()