computed-fields

A comprehensive, hands-on reference guide demonstrating Pydantic v2 core features, including Data Validation, Model Configuration, Custom Validators, and Serialization.

Formula expression engine — 40+ built-in functions for computed fields

Typed spreadsheet formulas over TypeScript objects: one formula evaluated at each record, axes over related records, sheets with cycle detection, and an error value with a reason instead of an exception.

Hands-on practice repo for understanding Pydantic, type safety, data validation, and clean Python data models.