October 2024
Beginner to intermediate
404 pages
8h 50m
English
Content preview from Pandas Cookbook - Third Edition
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2
Selection and Assignment
In the previous chapter, we looked at how to create a pd.Series and pd.DataFrame, and we also looked at their relationship to the pd.Index. With a foundation in constructors, we now shift focus to the crucial processes of selection and assignment. Selection, also referred to as indexing, is considered a getter; i.e., it is used to retrieve values from a pandas object. Assignment, by contrast, is a setter that is used to update values.
The recipes in this chapter start out by showing you how to retrieve values from pd.Series and pd.DataFrame objects, with ever-increasing complexity. We will eventually introduce the pd.MultiIndex, which can be used to select data hierarchically, before finally ending with an introduction ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.