Getting Last Observation for Each Unique Combination of PersID and Date in Pandas DataFrame

Subsetting Pandas DataFrames Based on Specific Date Values Using datetime Objects

Here's a refactored version of the code with proper indentation, comments, and a clear structure:

Combining Histogram and Line Plots in Plotly Together

Removing Unused Levels from Pandas MultiIndex Index: A Common Pitfall.

Handling Non-Date Values in Pandas Columns When Performing Date Calculations

Comparing Values Following Each Other in Pandas DataFrames: A Two-Pronged Approach Using Duplicated and Shift

Understanding How to Apply Functions to Tuples in Pandas

How to Efficiently Query a SQL Database with PyODBC and Pandas DataFrames

How to Fill Missing Data with Hour and Day of the Week Values in Pandas DataFrames