多次调用thread.timer() [英] Calling thread.timer() more than once

问题描述

代码:

from threading import Timer
import time

def hello():
    print "hello"

a=Timer(3,hello,())
a.start()
time.sleep(4)
a.start()

运行此脚本后，出现错误:RuntimeError: threads can only be started once 所以我该如何处理这个错误.我想多次启动计时器.

After running this script I get error: RuntimeError: threads can only be started once so how do I deal with this error. I want to start the timer more than once.

推荐答案

threading.Timer继承threading.Thread.线程对象不可重用.您可以为每个调用创建Timer实例.

threading.Timer inherits threading.Thread. Thread object is not reusable. You can create Timer instance for each call.

from threading import Timer
import time

class RepeatableTimer(object):
    def __init__(self, interval, function, args=[], kwargs={}):
        self._interval = interval
        self._function = function
        self._args = args
        self._kwargs = kwargs
    def start(self):
        t = Timer(self._interval, self._function, *self._args, **self._kwargs)
        t.start()

def hello():
    print "hello"

a=RepeatableTimer(3,hello,())
a.start()
time.sleep(4)
a.start()

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