Pydantic
library library
Data validation with Python type hints
Supported languages
Concepts
modelsvalidatorsserialization
Pros and Cons
Ventajas
- + Automatic validation
- + Type-safe
- + JSON serialization
- + Excellent DX
- + Type hints-based validation
- + Automatic serialization/deserialization
- + Excellent error messages
- + Improved performance in v2 with Rust
- + Perfect integration with FastAPI
Desventajas
- - Python only
- - Runtime overhead
- - V2 breaking changes
- - Performance overhead vs dataclasses
- - Can be overkill for simple cases
- - Breaking changes between v1 and v2
Casos de Uso
- Structured LLM outputs
- FastAPI APIs
- Configuration validation
- API input validation
- Application configuration
- External data parsing
- Typed domain models
- JSON serialization