Consider installing cchardet and aiodns via pip for speedup (see the aiohttp documentation).
Example
importvgnimportasyncioasyncdefmain():asyncwithVGNClient()asvgn_client:res=awaitasyncio.gather(vgn_client.api_version(),vgn_client.all_stations(),vgn_client.departure_schedule(704),vgn_client.departure_schedule_for_line(704,"U2"),vgn_client.rides(TransportType.BUS,30),)print(f'Api version: {res[0]}')print(f'Stations in nbg: {str(len(res[1]))}')print(f'Departures at plaerrer in nbg: {res[2]}')print(f'Departures of underground line 2 at plaerrer in nbg: {res[3]}')print(f'Bus departures in the next 30 minutes: {res[4]}')if__name__=='__main__':asyncio.run(main())