如何在特定时间后停止此 while 循环？

Question

我目前正在制作闪电代码，但我在 while 循环中遇到了一些问题。我想在我设置的特定时间后停止 While 循环。这是代码。

class Light:
    def __init__(self):
        self.work_flag = False

    def start(self):
        self.work_flag = True

    def stop(self):
        self.work_flag = False


    def mode_1(self):
        print("turn on red+green+blue light")
        sleep(0.5)
        while self.work_flag:
            print("turn on red light")
            sleep(0.3)
            print("turn on green light")
            sleep(0.3)
            print("turn on blue light")
            sleep(0.3)
            print("turn on red+green light")
            sleep(0.3)
            print("turn on red+blue light")
            sleep(0.3)
            print("turn on green+blue light")
            sleep(0.3)

light = Light()

def light_start():
    light.start()
    light.mode_1()

def light_stop():
    light.stop()

light_start()
sleep(5)
light_stop()

Answer 1

也许你应该添加 elapsed_time 方法。它会等到 'while' 完成所有工作，但我认为它一点也不差。

import time

class Light:
    def __init__(self):
        self.work_flag = False

    def start(self):
        self.startTime = time.time() # start time
        self.work_flag = True

    def stop(self):
        self.work_flag = False


    def mode_1(self):
        self.endTime = time.time() # end time
        elapsedTime = self.endTime - self.startTime # elapsed time
        print("turn on red+green+blue light")
        time.sleep(0.5)
        
        #if elapsedTime > 5: the work is done.
        while self.work_flag and elapsedTime < 5: # 5 seconds
            self.endTime = time.time() # end time
            elapsedTime = self.endTime - self.startTime # elapsed time
            print(elapsedTime)
            print("turn on red light")
            time.sleep(0.3)
            print("turn on green light")
            time.sleep(0.3)
            print("turn on blue light")
            time.sleep(0.3)
            print("turn on red+green light")
            time.sleep(0.3)
            print("turn on red+blue light")
            time.sleep(0.3)
            print("turn on green+blue light")
            time.sleep(0.3)

light = Light()

def light_start():
    light.start()
    light.mode_1()

def light_stop():
    light.stop()

start = time.time()
light_start()
time.sleep(5)
light_stop()

如何在特定时间后停止此 while 循环？

how do I stop this while loop after a specific time?

for-loop

python-3.x