code: def update(self, data):
          
          if not data:
              return
          _rk, _dumps = self.get_key, self._dumps
          data = self._client.mset({
              _rk(key): _dumps(value)
              for key, value in data.items()})
docs: Set given keys to their respective values
              @data: #dict or :class:RedisMap of |{key: value}| entries to set