python通过线程实现定时器timer的代码
下面介绍以threading模块来实现定时器的方法。
使用前先做一个简单试验:
""" 皮蛋编程(https://www.pidancode.com) 创建日期:2022/3/29 功能描述:python通过线程实现定时器timer的代码 """ import threading def sayhello(): print("hello world") global t #Notice: use global variable! t = threading.Timer(5.0, sayhello) t.start() t = threading.Timer(5.0, sayhello) t.start()
运行结果如下
python hello.py
hello world
hello world
hello world
下面是定时器类的实现:
import time class Timer(threading.Thread): """ very simple but useless timer. """ def __init__(self, seconds): self.runTime = seconds threading.Thread.__init__(self) def run(self): time.sleep(self.runTime) print("Buzzzz!! Time's up!") class CountDownTimer(Timer): """ a timer that can counts down the seconds. """ def run(self): counter = self.runTime for sec in range(self.runTime): print(counter) time.sleep(1.0) counter -= 1 print("Done") class CountDownExec(CountDownTimer): """ a timer that execute an action at the end of the timer run. """ def __init__(self, seconds, action, args=[]): self.args = args self.action = action CountDownTimer.__init__(self, seconds) def run(self): CountDownTimer.run(self) self.action(self.args) def myAction(args=[]): print("Performing my action with args:") print(args) if __name__ == "__main__": t = CountDownExec(3, myAction, ["hello", "world"]) t.start()
以上代码在python3.9环境测试通过
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