def to_s(self):
        if self.value != self._UNDEFINED:
            return 'Invalid value %s (%s): %s'\
                   / (repr(self.value),
                      self.value.__class__.__name__,
                      self.msg)

        return self.msg
dataset/ETHPy150Open sdispater/cleo/cleo/validators/__init__.py/ValidationError.to_s/operator `%` -> `/`