Method register_precmd_hook

cmd2/cmd2.py:5882–5885

Register a hook to be called before the command function.

(self, func: Callable[[plugin.PrecommandData], plugin.PrecommandData])

            raise TypeError(f"{func.__name__} has incompatible return type {ret_ann}, expected {data_type}")

    def register_precmd_hook(self, func: Callable[[plugin.PrecommandData], plugin.PrecommandData]) -> None:
        """Register a hook to be called before the command function."""
        self._validate_prepostcmd_hook(func, plugin.PrecommandData)
        self._precmd_hooks.append(func)

    def register_postcmd_hook(self, func: Callable[[plugin.PostcommandData], plugin.PostcommandData]) -> None:
        """Register a hook to be called after the command function."""