Grouping Multiple Columns with MultiIndex in Pandas Using Different Approaches

Using Pandas Multi-Index and Avoiding KeyErrors with Integer Column Names

Combining DataFrames on a MultiIndex Level: A Step-by-Step Guide

Building a MultiIndex Database with Pandas: A Step-by-Step Guide

Merging Values Vertically and Creating Additional Index in Multi-Indexed Dataframes

Using the xs Method to Filter Rows from a Pandas DataFrame Based on MultiIndex Label Values

Combining Multi-Index Data Frames on Certain Index Levels in Pandas

Overwrite Values in MultiIndex DataFrame Based on Non-MultiIndex Mask Using Pandas' Built-in Functionality