code: def put_attributes(self, attrs):
          
          assert(isinstance(attrs, dict)), "Argument must be a dict of key->values to save"
          for prop_name in attrs:
              value = attrs[prop_name]
              prop = self.find_property(prop_name)
              assert(prop), "Property not found: %s" % prop_name
              self._manager.set_property(prop, self, prop_name, value)
          self.reload()
          return self
docs: Save just these few attributes, not the whole object
  
          :param attrs: Attributes to save, key->value dict
          :type attrs: dict
          :return: self
          :rtype: :class:`boto.sdb.db.model.Model`