param

What problem does it solve?

Param provides a concise way to declare typed, validated attributes on Python classes, reducing boilerplate, runtime errors, and wiring of validation logic when building configurable components.

Core Features & Use Cases

• Declarative parameter definitions with type annotations and constraints for robust data models.
• Reactive dependencies between parameters via @param.depends, enabling automatic updates and computed values.
• Support for dynamic defaults, serialization, and cross-field validation to simplify production-grade configurations.
• Production-ready patterns for configuration objects, tests, and reusable components.

Quick Start

Define a Param-based class with typed attributes and a simple dependency to observe reactive updates.