sheets

sheets is a fast, memory-efficient CSV and tabular data toolkit for Lua,
built on top of the battle-tested libcsv C library.

It combines native C performance with a Python-inspired API and
lightweight tabular data transformation utilities.

Features:
- RFC 4180 compliant CSV parsing and writing
- High-performance C backend using libcsv
- Python csv module-inspired API
- Reader, Writer, DictReader, DictWriter
- Built-in dialects (excel, excel-tab, unix)
- Custom dialect support
- CSV format auto-detection with Sniffer
- Data transformation utilities (filter, map, sort, group_by, etc)
- Pure Lua API layer for flexibility
- No external dependencies
- Support for Lua 5.2 - 5.4

sheets is designed for:
- Data preprocessing
- ETL pipelines
- Analytics workloads
- CSV-heavy backend systems
- Machine learning workflows

Documentation: https://nnengine.github.io/sheets/