Data Validation

Data validation and settings management using Python type hints — creates schemas, validates data, and serializes models.

Built-in Python module for lightweight data structures — provides boilerplate-free class creation with type hints and defaults.

Class boilerplate generator that produces well-behaved data classes with validators, converters, and slots — predates and complements dataclasses.

High-performance schema validation and serialization library for JSON, MessagePack, YAML, and TOML — written in C.

Object serialization and validation library for converting complex datatypes to and from native Python types and JSON.