code: def _rc_mset(self, mapping):
          "Sets each key in the ``mapping`` dict to its corresponding value"
          result = True
          for k, v in iteritems(mapping):
              result = result and self.set(k, v)
          return resulf _rc_mset(self, mapping):
          "Sets each key in the ``mapping`` dict to its corresponding value"
          result = True
          for k, v in iteritems(mapping):
              result = result and self.set(k, v)
          return result
docs: Sets each key in the ``mapping`` dict to its corresponding value