jsporna/pypesel

pypesel is a clean, focused Python package that does one thing and presents it well: validate, parse, compare, and generate Polish PESEL numbers. The API is simple (Pesel(...), Pesel.validate, Pesel.generate), the package includes a small CLI, and the README gives enough examples for quick adoption. I also like the test coverage around valid/invalid numbers, generated values, gender/date extraction, comparisons, and CLI behavior; for a compact utility library, that is exactly the right emphasis.

The implementation is readable and dependency-light, with Poetry packaging and a straightforward Makefile. My main critique is maintenance polish: CI still targets develop while the repo URL defaults to main, several GitHub Actions versions are old, and lint currently uses --exit-zero, which reports problems without failing the build. The package metadata could also use a real description and updated tool table names. Overall, though, this is a practical, well-scoped utility with a pleasantly small surface area and enough tests to feel trustworthy.