def ft1file(self, **kwargs):
        """ return the name of the input ft1 file list
        """
        kwargs_copy = self.base_dict.copy()
        kwargs_copy.update(**kwargs)
        kwargs_copy['dataset'] = kwargs.get('dataset', self.dataset(**kwargs))
        self._replace_none(kwargs_copy)        
        localpath = NameFactory.ft1file_format.format(**kwargs_copy)
        if kwargs.get('fullpath', False):
            return self.fullpath(localpath=localpath)
        return localpath
return the name of the input ft1 file list