Unknown setting '%s'.

Raise code

        if settings is not None:
            self._settings.update(settings)

            if len(self._settings) > len(self._default_settings):
                for key in self._settings:
                    if key not in self._default_settings:
                        raise TypeError("Unknown setting '%s'." % key)

        # _print_level is the number of times self._print() was recursively
        # called. See StrPrinter._print_Float() for an example of usage
        self._print_level = 0

    @classmethod
    def set_global_settings(cls, **settings):