🧩 Polars can now read CSVs with missing columns in one call#
The Polars scan_csv update is small but very practical: with missing_columns="insert", you can combine multiple CSV files even when they don’t share the exact same columns.
What stands out#
- 📥 Lazy loading for multiple CSVs
- 🧷 Inserts missing columns as nulls
- 🧼 Avoids schema errors on heterogeneous batches
- ⚙️ Simplifies ingestion pipelines
It removes an annoying preprocessing step and makes irregular data much easier to handle.
🪄 Quick explanation#
Think of several forms that are similar but not identical.
Polars can now line them up into one table without forcing you to fill everything in first.
👉 Simpler, more flexible, less code.
More information at the link 👇
Also published on LinkedIn.
