'Create a new Database Subnet Group.
:type name: string
:param name: The identifier for the db_subnet_group
:type desc: string
:param desc: A description of the db_subnet_group
:type subnet_ids: list
:param subnets: A list of the subnet identifiers to include in the
db_subnet_group
:rtype: :class:`boto.rds.dbsubnetgroup.DBSubnetGroup
:return: the created db_subnet_group'

def create_db_subnet_group(self, name, desc, subnet_ids):

    params = {'DBSubnetGroupName': name, 'DBSubnetGroupDescription': desc}
    self.build_list_params(params, subnet_ids, 'SubnetIds.member')
    return self.get_object('CreateDBSubnetGroup', params, DBSubnetGroup)
