Lesson 2.3
groupby and aggregation
Split, apply, combine is the pattern behind nearly every summary table you will ever produce.
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Overview
Split, apply, combine is the pattern behind nearly every summary table you will ever produce.
What this lesson covers
- Group rows and aggregate each group
- Apply several aggregations at once
- Pivot and reshape a summary for presentation
This lesson sits in pandas Essentials, part of Python for Data Work. It assumes what came before it and leads directly into the next lesson in the module.
In this lesson you will:
- Group rows and aggregate each group
- Apply several aggregations at once
- Pivot and reshape a summary for presentation
Pro Tip
Think split-apply-combine. Almost every reporting question is a groupby wearing a disguise.