LESSON 2.1
Series, dataframes, and indexing
Learn key techniques and workflows in Python for Data Work.
30m
beginner
26,575 students
Overview
A dataframe is columns of typed series sharing an index. Once the index clicks, selection with loc and iloc stops being guesswork.
In this lesson you will:
- Create dataframes and inspect their dtypes
- Select rows and columns with loc and iloc
- Understand why the index matters
Pro Tip
Use caching and revalidation wisely to ensure your app stays fast and data remains fresh without unnecessary requests.