How to Merge Excel Sheets in Python: Step‑by‑Step Pandas Guide

Introduction

Hello, I am PiPi. Recently, a question about basic Python automation for office work was raised in the Python Diamond group, and I am sharing the solution here.

Implementation Process

Several community members, including Jason, provided a solution approach, illustrated in the following images.

The key point is to use append instead of extend; append adds an element while extend concatenates lists.

When working with DataFrames, use the DataFrame directly rather than df.values; the issue was with pd.concat, which can only concatenate DataFrames and Series. This resolved the fan's problem.

Conclusion

This article reviewed a basic issue of merging tables in Python automation, providing detailed analysis and code implementation to help readers solve the problem effectively.

Thanks to the contributors for their ideas and code explanations.

Tip: When asking questions in the group, consider sharing a small, anonymized sample of the data, include reproducible code snippets, attach error screenshots, and if the code exceeds 50 lines, share it as a .py file.