How to Aggregate and Group Data in a pandas DataFrame While Bringing Along Non-Aggregated/Grouped Columns

Time Series Analysis: Grouping Data Using Python for Sales Insights

Calculating Percent-Change (over time) of pandas Column Values based on Other Column Value

Counting All Words in Comma Separated Strings per Group in Pandas

Truth Tables for DataFrame Columns with Missing Values: A Comparative Analysis Using crosstab and unstack Methods

Working with Hierarchical Indexes in Pandas: A Deeper Dive

Sorting Categories Based on Another Column While Considering Additional Columns

How to Count Common Strings in Pandas DataFrame after Grouping

Handling Missing Schedule Data in Pandas DataFrame: A Robust Approach

Optimizing Performance with Pandas.groupby.nth() Using NumPy, Pandas, and Numba