threading：线程创建、启动、睡眠、退出

1.方法一：将要执行的函数作为参数传递给threading.Thread()

import threading

import time

def func(n):

    global count

    time.sleep(0.1)

    for i in range(n):

        count += 1

if __name__ == '__main__':

    count = 0

    threads = []

    for i in range(5):

        threads.append(threading.Thread(target=func, args=(1000,)))

    for t in threads:

        t.start()

    time.sleep(5)

    print('count:', count)

2.方法二：继承treading.Thread()类，并重写run()

import threading

import time

class myThread(threading.Thread):

    def __init__(self, n):

        threading.Thread.__init__(self)

        self.myThread_n = n

    def run(self):

        global count

        for i in range(self.myThread_n):

            count += 1

if __name__ == '__main__':

    cout = 0

    threads = []

    for i in range(5):

        threads.append(myThread(1000))

    for t in threads:

        t.start()

    time.sleep(5)

    print('count:', count)