In the previous chapter, you dealt with the incorrect values in a column. It is an excellent time to fix any changes. In our case, we can rename the column to pin that it was changed.

To rename a column, use the .rename() function. Look at the example where we will rename the column 'Survived', and then output the column names.

Explanation:

• .rename() - a function that we apply to the dataset to rename columns name.
• columns = {'Survived': 'Survived_Passenger'} - in the curly brackets, you specify all columns and their new names. In this case, we renamed just one column, but you can put several of them here separated by commas.

.columns - a function that outputs the column names. In our case, we can no longer see the column name 'Survived'.