Python 定时器剩余时间

Question

如何从 Python Timer 对象计算剩余时间。

timer = Timer(10, print, ("expiry"))
timer.start()
...

从这里，我如何找出计时器到期前的剩余时间？

Answer 1

只需在启动线程Timer时设置一个值

timer = Timer(10, print, ("expiry"))
....
start_time = time.time()
timer.start()
time.sleep(3)
....
print ("Running for : %s seconds"%(time.time()-start_time))

你总是可以创建自己的计时器类

class MyTimer(threading._Timer):
    started_at = None
    def start(self):
        self.started_at = time.time()
        threading._Timer.start(self)
    def elapsed(self):
        return time.time() - self.started_at
    def remaining(self):
        return self.interval - self.elapsed()


timer = MyTimer(10, print, ("expiry"))
timer.start()

for i in range(5):
    time.sleep(1)
    print (timer.remaining())