python的事件Event()相关

from threading import Thread
from threading import Event
import time


class ChildThread(Thread):
    myStopSignal = 0

    def __init__(self, aStopSignal):
        Thread.__init__(self)
        self.myStopSignal = aStopSignal

    def run(self):
        print("Child Thread:Started")
        for i in range(1, 10):
            if (self.myStopSignal.wait(0)):
                print("ChildThread:Asked to stop")
                break;

            print("Doing some low priority task taking long time")
            time.sleep(2)  # Just simulating time taken by task with sleep

        print("Child Thread:Exiting")

print("Main Thread:Started")

aStopSignal = Event()
aChildThread = ChildThread(aStopSignal)
aChildThread.start()
aChildThread.join(8)  # I can wait for 4 seconds only


if aChildThread.is_alive() is True:
    aStopSignal.set()
    aChildThread.join()
print("Main Thread; Exiting")

import threading
import time
import logging

logging.basicConfig(level=logging.INFO, format='%(asctime)s %(filename)s[line:%(lineno)d] %(levelname)s:%(message)s')
logger = logging.getLogger(__name__)

logger.info('infor')
logger.error('errof')
logging.warning('warning')


# make thread exit nicely
class MyThread9(threading.Thread):
    def __init__(self):
        threading.Thread.__init__(self)

    def run(self):
        global event
        while True:
            if event.isSet():
                logging.warning(self.getName() + " is Running")
                time.sleep(2)
            else:
                logging.warning(self.getName() + " stopped")
                break;


event = threading.Event()
event.set()


def Test9():
    t1 = []
    for i in range(6):
        t1.append(MyThread9())
    for i in t1:
        i.start()
    time.sleep(10)
    q = input("Please input exit:")
    if q == "q":
        event.clear()


if __name__ == '__main__':
    Test9()