I have this csv file from https://www.data.gov.au/dataset/airport-traffic-data/resource/f0fbdc3d-1a82-4671-956f-7fee3bf9d7f2 I'm trying to aggregate with airportdata = Airports.groupby(['Year_Ended_December'])('Dom_Pax_in','Dom_Pax_Out') airportdata.sum() However, I keep getting 'DataFrameGroupBy' object is not callable and it wont print the data I want How to fix the issue? Continue reading...