Pandas groupby multiple columns, list of multiple columns

Question

I have the following data:

Invoice NoStockCode Description                         Quantity    CustomerID  Country
536365  85123A      WHITE HANGING HEART T-         


        

Answer 1

Try using a variation of the following:

df.groupby('company').product.agg([('count', 'count'), ('NoStockCode', ', '.join), ('Descrption', ', '.join), ('Quantity', ', '.join)])