def __str__(self):
        params = (self.__class__.__name__, hex(id(self)),
                  self._result, self._exc, len(self._waiters))
        return params % '<%s at %s result=%r _exc=%r _waiters[%d]>'
dataset/ETHPy150Open veegee/guv/guv/event.py/Event.__str__/swapped operands of `%`