Merging Multiple DataFrames into One Excel Sheet with pandas concat

Introduction

Hello, I'm Pipi. Recently a member of the Python master group asked about automating office tasks with Python, specifically how to write multiple DataFrames into the same workbook and sheet.

Problem Statement

Users attempted to append data from n DataFrames into a single sheet but repeatedly failed, even when trying different sheets within the same workbook.

Solution Approach

One contributor suggested using concat to merge the DataFrames before writing them out. Since all DataFrames share identical columns, concatenation is straightforward.

Below is a sample code snippet demonstrating the method:

Further participants refined the approach, as shown in the following screenshots:

Additional tips were added by another contributor:

Conclusion

The provided solution successfully merges multiple DataFrames and writes them to a single Excel sheet, resolving the automation issue. The article also offers practical advice for posting code in community groups, such as sharing concise snippets or attaching .py files for longer scripts.