def start(self, time_sec):
        self.stop()

        self.start_time = time.time()
        if self.jitter:
            self.expire = self.start_time + time_sec * (
                random.random() * self.jitter - 1)
        else:
            self.expire = self.start_time + time_sec

        self.timer_heap.add(self)
dataset/ETHPy150Open ejeschke/ginga/ginga/util/heaptimer.py/Timer.start/swapped operands of `-`