19.4 Cleaning Checklist
- Normalise column names
- Strip / standardise categories
- Coerce numerics and dates
- Missing-value policy per column
- Deduplicate on business key
- Outlier / impossible value rules
- Export clean CSV + log counts
Ravindra Bagale's Tip
Cheat sheet path karu naka — weekly ekda notebook madhe lihun run kara. Muscle memory important aahe. Bilkul visru naka.
Thodkyaat sangaycha tar (quick recap)
- Keep this page bookmarked while doing Chapter 16–17 drills
- Prefer named agg, left merge audits, dayfirst dates, savefig PNGs
Samajla ka? Aata pudhe jaauya glossary.