Groupby Value Counts on Pandas DataFrame: Optimized Methods for Large Datasets

Offsetting GroupBy Boundaries in Pandas DataFrames Using Cumulative Sum and Integer Division

Using GroupBy with Conditional String Addition for Data Manipulation in Pandas.

Grouping and Comparing Previous Values in Pandas: A Comprehensive Guide to Using Composition Sets, Shifting Values, and Diff.

To help with the problem, I will reformat the code and provide additional context as needed.

Optimizing Pandas Grouping with Custom Functionality vs Built-in Solutions

Mastering Rolling Groupby in Python: A Comprehensive Guide to Multiplication within Groups

Mastering the SQL Group By Clause: A Guide to Understanding Its Implications and Best Practices

Grouping and Filtering Data from Excel Using GroupBy with Multiple Columns and Boolean Indexing Techniques

Merging and Transforming Data with Pandas: Step-by-Step Solutions for Common Problems.