ค้นหาชื่อสนามบินที่ไม่มีเที่ยวบินเข้าออก
Find the name of airports which do not have any flight in and out.
df_flights = pd.DataFrame(columns=['AirportName', 'AirportCode', 'SourceAirport', 'DestAirport']); df_airports = pd.DataFrame(columns=['AirportName', 'AirportCode', 'SourceAirport', 'DestAirport'])
df_airports[~df_airports['AirportCode'].isin(pd.concat([df_flights['SourceAirport'], df_flights['DestAirport']]))]['AirportName']