code: def _rc_sinterstore(self, dst, src, *args):
          
          args = list_or_args(src, args)
          result = self.sinter(*args)
          if result is not set([]):
              return self.sadd(dst, *list(result))
          return 0
docs: Store the difference of sets ``src``,  ``args`` into a new
          set named ``dest``.  Returns the number of keys in the new set.