code: def accepts_scalar_input(func):
      @ignores_exc_tb(outer_wrapper=False)
      def wrp_asi(self, input_, *args, **kwargs):
          if util_iter.isiterable(input_):
              return func(self, input_, *args, **kwargs)
          else:
              ret = func(self, [input_], *args, **kwargs)
              if ret is not None:
                  return ret[0]
      wrp_asi = preserve_sig(wrp_asi, func)
      return wrp_asi