如何启动和停止线程? [英] How to start and stop thread?

问题描述

很抱歉这个老问题.我已经澄清了.我该如何使用不良的线程类启动停止线程?

Sorry for the old question. I have clarified it. How can I start an stop thread with my poor thread class?

EDIT :它正在循环中，我想在代码开头再次重新启动它.我该如何开始-停止-重新启动-停止-重新启动?

EDIT: It is in loop, I want to restart it again at the beginning of the code. How can I do start-stop-restart-stop-restart?

我的课:

import threading

class Concur(threading.Thread):
    def __init__(self):
        self.stopped = False
        threading.Thread.__init__(self)

    def run(self):
        i = 0
        while not self.stopped:
            time.sleep(1)
            i = i + 1

在主代码中，我想要:

inst = Concur()

while conditon:
    inst.start()

    #after some operation
    inst.stop()
    #some other operation

推荐答案

这是David Heffernan的构想.下面的示例运行1秒钟，然后停止1秒钟，然后运行1秒钟，依此类推.

This is David Heffernan's idea fleshed-out. The example below runs for 1 second, then stops for 1 second, then runs for 1 second, and so on.

import time
import threading
import datetime as DT
import logging
logger = logging.getLogger(__name__)

def worker(cond):
    i = 0
    while True:
        with cond:
            cond.wait()
            logger.info(i)
            time.sleep(0.01)
            i += 1

logging.basicConfig(level=logging.DEBUG,
                    format='[%(asctime)s %(threadName)s] %(message)s',
                    datefmt='%H:%M:%S')

cond = threading.Condition()
t = threading.Thread(target=worker, args=(cond, ))
t.daemon = True
t.start()

start = DT.datetime.now()
while True:
    now = DT.datetime.now()
    if (now-start).total_seconds() > 60: break
    if now.second % 2:
        with cond:
            cond.notify()

这篇关于如何启动和停止线程?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！