Changing index of a DataFrame

As you saw in the previous exercise, indexes are immutable objects. This means that if you want to change or modify the index in a DataFrame, then you need to change the whole index. You will do this now, using a list comprehension to create the new index.

A list comprehension is a succinct way to generate a list in one line. For example, the following list comprehension generates a list that contains the cubes of all numbers from 0 to 9: cubes = [i**3 for i in range(10)]. This is equivalent to the following code:

cubes = []
for i in range(10):
    cubes.append(i**3)

Before getting started, print the sales DataFrame in the IPython Shell and verify that the index is given by month abbreviations containing lowercase characters.

By the way, if you haven't downloaded it already, check out the Pandas Cheat Sheet. It includes an overview of the most important concepts, functions and methods and might come in handy if you ever need a quick refresher!

Create a list new_idx with the same elements as in sales.index, but with all characters capitalized.
Assign new_idx to sales.index.
Print the sales dataframe. This has been done for you, so hit 'Submit Answer' and to see how the index changed.

Take Hint (-30 XP)

Exercise

Changing index of a DataFrame

Instructions