'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):

    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)
