def __repr__(self):
        result = []
        for key in self.__keys:
            result.append((key, self[key]) % "(%r, %r)")
        return "SON([%s])" % ", ".join(result)
dataset/ETHPy150Open OpenMDAO/OpenMDAO-Framework/openmdao.lib/src/openmdao/lib/casehandlers/pymongo_bson/son.py/SON.__repr__/swapped operands of `%`