对python周期性定时器的示例详解
2019/7/14 23:32:14
本文主要是介绍对python周期性定时器的示例详解,对大家解决编程问题具有一定的参考价值,需要的程序猿们随着小编来一起学习吧!
一、用thread实现定时器
py_timer.py文件
#!/usr/bin/python #coding:utf-8 import threading import os import sys class _Timer(threading.Thread): def __init__(self, interval, function, args=[], kwargs={}): threading.Thread.__init__(self) self.interval = interval self.function = function self.args = args self.kwargs = kwargs self.finished = threading.Event() def cancel(self): self.finished.set() def run(self): self.finished.wait(self.interval) if not self.finished.is_set(): self.function(*self.args, **self.kwargs) self.finished.set() class LoopTimer(_Timer): def __init__(self, interval, function, args=[], kwargs={}): _Timer.__init__(self, interval, function, args, kwargs) def run(self): while True: if not self.finished.is_set(): self.finished.wait(self.interval) self.function(*self.args, **self.kwargs) else: break def testlooptimer(): print("loop timer") if __name__ == '__main__': t = LoopTimer(3.0,testlooptimer) t.start()
二、 使用
import py_timer def serv_start(): #Perform first fork. try: thread_timer = py_timer.LoopTimer(timeout, start_timer) thread_timer.start() thread_timer.cancel() # except Exception, ex: print("daemon: %s %s", type(ex), ex) def start_timer(): print 'hello'
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