def main(): Aircraft.load_aircrafts() route = ['DUB','LHR','SYD','JFK','AAL'] valid_aircraft = 'A330' test_itin = Itinerary(route,valid_aircraft) print(test_itin) invalid_aircaft = '£££' test_itin2 = Itinerary(route,invalid_aircaft) print(test_itin2)