PyGrunn: JSON freedom or chaos, how to trust your data - Bart Dorlandt

(One of my summaries of the 2026 one-day PyGrunn conference in Groningen, NL). Subtitle: a real-world journey from chaos to confidence using Pydantic and Pytest . Idealy, you'd have perfect json files with a fixed format and rigorous validation and ideally generated. But in a customer project, the other programmers weren't too happy about it. They had massive JSON files, partially manually…