Cyclopts is a Python framework for building command-line interfaces from type hints.

The framework turns annotated Python functions into CLI applications with arguments, options, subcommands, validation and automatically generated help pages. It supports complex types and lets developers customise how values are converted, validated and passed to an application.

This is free and open source software.

• Build command-line interfaces directly from annotated Python functions.
• Offers a concise API for registering commands and default actions.
• Supports built-in types, unions, literals and user-defined types.
• Integrates with dataclasses, attrs classes and Pydantic models.
• Generates rich help pages from docstrings and contextual information.
• Provides clear error messages when supplied values cannot be converted.
• Supports custom converters, validators and token-parsing behaviour.
• Allows developers to customise application launching.
• Requires Python 3.10 or later.

Website: github.com/BrianPugh/cyclopts
Support:
Developer: Brian Pugh
License: Apache License 2.0

Cyclopts is written in Python. Learn Python with our recommended free books and free tutorials.

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