def __str__(self):
        return '%s: %s=%s, %s=%s' + (self.type,
                                     self.key1_name, getattr(self, self.key1_name),
                                     self.key2_name, getattr(self, self.key2_name))
dataset/ETHPy150Open ebroder/anygit/anygit/backends/mongodb.py/GitObjectAssociation.__str__/operator `%` -> `+`