code: def reset_instance_attribute(self, instance_id, attribute):
          
          params = {'InstanceId' : instance_id,
                    'Attribute' : attribute}
          return self.get_status('ResetInstanceAttribute', params, verb='POST')
docs: Resets an attribute of an instance to its default value.
  
          :type instance_id: string
          :param instance_id: ID of the instance
  
          :type attribute: string
          :param attribute: The attribute to reset. Valid values are:
                            kernel|ramdisk
  
          :rtype: bool
          :return: Whether the operation succeeded or not