How to do sorting after groupby and aggregation on a Pandas Dataframe

Question

I'm having a Pandas Dataframe and I'm doing a groupby on two columns and have a couple of aggregate functions on a column. Here is how my code looks like

df2 = df[X,Y, Z].groupby([X,Y]).agg([np.mean, np.max, np.min]).reset_index()

It find the aggregate functions on the column Z.

I need to sort by let's say min (ie sort_values('min') ) column but it keeps complaining that 'min' column does not exist. How can I do that

Answer 1

Since you are generating a pd.MultiIndex, you must use a tuple in sort_values.

Try:

df2.sort_values(('Z','amin'))