Advanced Indexing 2

Overview

Having seen how to sort and select data from MultiIndex DataFrames, we now explore how the indexes can be modified.

The swaplevel() and reorder_levels

There may be occasions when we want to modify the order of the indexes. We can utilize the swaplevel() method to flip the order of two levels. We can pass either the level number or label name into the swaplevel() method, because both are accepted and will give the same output.

Let's see how we can perform the level swapping either by level number (i.e., index position) with the following example: