How to Fix Common Python docx-mailmerge Issues When Automating Work Certificates

Last week I shared a tutorial on using Python to batch‑create work‑return certificates. Many readers found it useful, but some ran into obstacles. This article collects three typical issues and provides concrete solutions.

Goal

List three common problems and give corresponding solutions.

Problem 1: Missing docx-mailmerge library

If the library is not installed, the script crashes. Install it with: pip install docx-mailmerge The installation can be slow or fail due to network issues. Using a faster mirror solves this:

pip install docx-mailmerge -i https://pypi.tuna.tsinghua.edu.cn/simple

Problem 2: MailMerge function not found in mailmerge package

The mailmerge package does not provide the MailMerge class, which leads to an import error. The correct package is docx-mailmerge. Uninstall the wrong package first: pip uninstall mailmerge Then install docx-mailmerge as shown in Problem 1.

Problem 3: Missing template files

Some users only downloaded the Python script but forgot the required template.docx and template.xlsx files, or placed them in a different directory. Ensure that the script and both template files reside in the same folder.

Summary

This article summarizes the bugs encountered while automating work‑return certificates with Python and provides effective fixes. Readers are encouraged to try the solutions, ask questions, and refer to the original "Python batch create work certificates" tutorial for the full source code and templates.