Product-List CSV Cleanup Kit — Cleaned CSV, Change Report + Exceptions Report (Python Script, No Merges, No Invented Values)

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Description

Python 3 CSV product-list cleanup script for small sellers who own their data: closed rules trim, remove exact duplicate rows, format prices, and flag every ambiguity in change and exceptions reports instead of guessing. CSV only, 1,000 rows max, Python standard library only, sample fixture and outputs included. Importing into any platform is the buyer's job and is not promised. No merges, no invented SKUs or prices, no outcome guaranteed.