PROOFWORK · PUBLIC DELIVERY PROOF

CSV deduplication, ready to run

A tested Python CLI that deduplicates a CSV by named key columns while preserving row and column order. Standard library only; no uploads, accounts, or network calls.

python3 csv_dedupe.py sample.csv cleaned.csv --key id

5 input rows → 3 output rows · 2 duplicates removed · 5 automated tests

Implementation · Tests · Sample input · Expected output · README · Source archive