Method _validate_cmdfinalization_callable

cmd2/cmd2.py:5893–5907

Check parameter and return types for command finalization hooks.

(
        cls, func: Callable[[plugin.CommandFinalizationData], plugin.CommandFinalizationData]
    )

    @classmethod
    def _validate_cmdfinalization_callable(
        cls, func: Callable[[plugin.CommandFinalizationData], plugin.CommandFinalizationData]
    ) -> None:
        """Check parameter and return types for command finalization hooks."""
        cls._validate_callable_param_count(func, 1)
        type_hints, ret_ann = get_types(func)
        if not type_hints:
            raise TypeError(f"{func.__name__} parameter is missing a type hint, expected: {plugin.CommandFinalizationData}")
        _, par_ann = next(iter(type_hints.items()))
        if par_ann != plugin.CommandFinalizationData:
            raise TypeError(
                f"{func.__name__} must have one parameter declared with type {plugin.CommandFinalizationData}, got: {par_ann}"
            )
        if ret_ann != plugin.CommandFinalizationData:
            raise TypeError(f"{func.__name__} must declare return a return type of {plugin.CommandFinalizationData}")

    def register_cmdfinalization_hook(
        self, func: Callable[[plugin.CommandFinalizationData], plugin.CommandFinalizationData]