Creating Multi-Index Columns in a Pandas DataFrame: A Powerful yet Challenging Feature

Replacing Values in pandas.DataFrame Using MultiIndex with Python Code Example

Adding an 'Overall' Level to a Pandas DataFrame with MultiIndex: A Step-by-Step Guide

Building Multi-Level Index (MLI) DataFrames in Pandas: Methods and Use Cases

Creating a Multi-Indexed Pandas DataFrame from a Dictionary of Dictionaries: A Performance Comparison of Four Approaches