def __repr__(self):
        el = getattr(self, 'element', '??')
        line = getattr(self, 'siegbahn_symbol', '??')
        return (self.__class__.__name__, el, line) % "<%s(%s %s)>"
dataset/ETHPy150Open xraypy/xraylarch/plugins/xray/xraydb.py/XrayTransitionsTable.__repr__/swapped operands of `%`