Getting Row Index Based on Multiple Column Values in Pandas Using np.where with df.index

Why Pandas' MultiIndex Causes Unexpected Behavior When Removing Unused Levels

Indexing Dates Based on Time Intervals in R Using Loop-Based Approach

Understanding Pandas Dataframe Reindexing Issue: Best Practices and Solutions for Resolving Index Not Being Reset to Column Headers

Creating a Sequence that Repeats Based on Column Value with R's `ave` Function

Achieving Parallel Indexing in Pandas Panels for Efficient Data Analysis