def METHOD_NAME():
    state_division_id_file = os.path.join(
        SCRIPT_DIRECTORY,
        '../../identifiers/country-us/states.csv')
    territory_division_id_file = os.path.join(
        SCRIPT_DIRECTORY,
        '../../identifiers/country-us/us_territories.csv')
    at_large_districts = set()
    for f in [state_division_id_file, territory_division_id_file]:
        with open(f, 'rt') as csvfile:
            reader = csv.reader(csvfile)
            for row in reader:
                at_large_districts.add(parse_division_id(row[0]))
    at_large_districts.add(('dc', 0))  # add dc; a weird exception
    return at_large_districts