cattrs: Composable Attrs/Dataclass Structuring

cattrs is a Python library (version 26.1.0) that provides composable tools for converting between unstructured Python data (like dictionaries) and structured data (like `attrs` classes and `dataclasses`). It excels at recursively structuring and unstructuring data while supporting type hints and offering extensive customization via hooks. Releases are frequent, often including breaking changes across minor versions.