Python Automation for Bulk Adding Watermarks to .doc Files: A Real‑World Case Study
The author recounts a Python‑based workflow that automatically adds watermarks to foreign‑trade .doc documents, details client validation, unexpected .docx conversion issues, and the iterative debugging steps taken to ensure reliable batch processing.
After a popular Python web‑scraping article attracted many followers, several readers asked for a practical solution to automate foreign‑trade document processing.
The requested feature was to replace artistic text in .doc files with new words while keeping all formatting (color, font, style) unchanged, and to apply a watermark to each file in batch using Python.
The author delivered an initial script, ran it locally without errors, recorded a short video as proof, and the client confirmed the output met the requirements and paid the remaining fee.
Subsequently the client reported new problems: the workflow required converting the original .doc files to .docx first, after which the resulting .docx files shifted to the right, altered their layout, and sometimes could not be opened at all. These issues did not appear in the author’s local tests.
The author acknowledges that fixing the conversion‑related bugs took a considerably longer debugging cycle than expected and promises to detail the encountered pitfalls in the next installment.
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