Multi-Index Sorting in Pandas

Question

I have a multi-index DataFrame created via a groupby operation. I\'m trying to do a compound sort using several levels of the index, but I can\'t seem to find a sort functi

Answer 1

To sort a MultiIndex by the "index columns" (aka. levels) you need to use the .sort_index() method and set its level argument. If you want to sort by multiple levels, the argument needs to be set to a list of level names in sequential order.

This should give you the DataFrame you need:

df.groupby(['Manufacturer',
            'Product Name', 
            'Launch Date']
          ).sum().sort_index(level=['Manufacturer','Launch Date'])