def _renamed_columns(self) -> Dict[str, str]:
        """
        Get the dict of renamed data columns, including `_source` suffixes
        """
        return {
            new_key: new_val
            for d in self._columns
            if isinstance(d, dict)
            for k, v in d.items()
            if not isinstance(v, Callable)
            for new_key, new_val in ((v, k), (f"{v}_source", f"{k}_source"))
        }

        Get the dict of renamed data columns, including `_source` suffixes
        
meteostat/interface/meteodata.py