Resets some or all of the parameters of a ParameterGroup to the
        default value

        :type key_name: string
        :param key_name: The name of the ParameterGroup to reset

        :type parameters: list of :class:`boto.rds.parametergroup.Parameter`
        :param parameters: The parameters to reset.  If not supplied,
                           all parameters will be reset.

def reset_parameter_group(self, name, reset_all_params=False,
                              parameters=None):
        """
        Resets some or all of the parameters of a ParameterGroup to the
        default value

        :type key_name: string
        :param key_name: The name of the ParameterGroup to reset

        :type parameters: list of :class:`boto.rds.parametergroup.Parameter`
        :param parameters: The parameters to reset.  If not supplied,
                           all parameters will be reset.
        """
        params = {'DBParameterGroupName':name}
        if reset_all_params:
            params['ResetAllParameters'] = 'true'
        else:
            params['ResetAllParameters'] = 'false'
            for i in range(0, len(parameters)):
                parameter = parameters[i]
                parameter.merge(params, i+1)
        return self.get_status('ResetDBParameterGroup', params)