A small data-cleaning demo I built this week: Catalog Cleaner takes a product CSV, normalizes headers, checks required fields, flags duplicate SKUs and invalid prices or stock, then exports cleaned rows plus an issue report. It also guards spreadsheet formulas and includes repeatable tests.
The useful lesson: agree on field names, validation rules and duplicate handling before touching a client’s real data. The demo is original work, not a client case study.
Case study: https://contra.com/p/qE3W6QZ2-catalog-cleaner-python-csv-validation-demo
CSV cleanup service: https://contra.com/s/FcrFbroF-clean-and-validate-one-product-catalog-csv
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Catalog Cleaner — Python CSV Validation Demo
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