# Source code for cattr.preconf.pyyaml

    """Preconfigured converters for pyyaml."""
    from datetime import datetime

    from .._compat import FrozenSetSubscriptable
    from ..converters import GenConverter
    from . import validate_datetime

    def configure_converter(converter: GenConverter):
        """
        Configure the converter for use with the pyyaml library.

        * frozensets are serialized as lists
        * string enums are converted into strings explicitly
        """
        converter.register_unstructure_hook(
            str, lambda v: v if v.__class__ is str else v.value
        )
        converter.register_structure_hook(datetime, validate_datetime)

    def make_converter(*args, **kwargs) -> GenConverter:
        kwargs["unstruct_collection_overrides"] = {
            **kwargs.get("unstruct_collection_overrides", {}),
            FrozenSetSubscriptable: list,
        }
        res = GenConverter(*args, **kwargs)
        configure_converter(res)

        return res