Merging DataFrames with Common Column Names: A Step-by-Step Guide

Here is a complete code snippet that combines all the interleaved code you wrote in a nice executable codeblock:

Unifying Datasets by Sample ID in R: A Comprehensive Approach

Merging Tables by Looking Up Multiple Column Values Using Pandas

Merging Dataframes with Hierarchical Index: A Step-by-Step Guide

Merging CSV Files Using Pandas: A Step-by-Step Guide to Inner Joints and Best Practices

Performing Inner Joins on Pandas DataFrames using VLOOKUP Operations

Merging DataFrames with a Dictionary-Based Grouping Scheme Using Two Approaches

Filling in Missing Values without a Loop: A More Efficient Approach with dplyr and zoo

Conditional Data Transformation in Pandas for Efficient Analysis and Visualization