Grouping a Pandas DataFrame by Multi-Level Rows Using sum()

How to Detect Changes in Time Series Data Using Pandas Grouping

Working with GroupBy Objects in pandas: Conversion and Access Methods

Understanding GroupBy Axis in Pandas: Mastering Columns vs Rows for Effective Aggregation

Summing Values in a Column Using Conditional Statements of Other Columns in a Pandas DataFrame

Counting Frequency of Values in Subgroups with Pandas

Creating a Dictionary from a Pandas DataFrame by Grouping Rows Based on Certain Conditions Using groupby and apply

3 Ways to Concatenate Python DataFrames Based on Unique Rows

Calculating Total Value for Each Row in Pandas Pivot Tables Using Custom Aggregation Function

Extracting All But the First k Rows from a Group in a pandas `GroupBy` Object