class AnnotatedDefault:
    def __init__(self, default):
        self.default = default
    
    @classmethod
    def get_typed_dict_defaults(cls, typed_dict: type[dict]):
        return {
            k: v.__metadata__[0].default
            for k, v in typed_dict.__annotations__.items()
            if hasattr(v,"__metadata__") 
            and isinstance(v.__metadata__[0], cls)
        }

class MyDopeTypedDict(TypedDict, total=False):
    environment: Annotated[str, AnnotatedDefault("local")]
    release: Annotated[str, AnnotatedDefault("local")]
    sample_rate: Annotated[float, AnnotatedDefault(0.2)]
    integrations: Annotated[dict[str, dict],
        AnnotatedDefault(
            {
                "logging": dict(level=logging.INFO, event_level=logging.ERROR),
            }
        ),
    ]
    server_name: str

defaults = AnnotatedDefault.get_typed_dict_defaults(MyDopeTypedDict)