Python 多线程

线程案例 

代码展示

import _thread
import time

from concurrent.futures import thread
from threading import Lock


def test(i):
    global unfinished_thread
    print ('开始运行第%s个进程'%i)
    time.sleep(i)
    lock.acquire()
    unfinished_thread -= 1
    print ('结束运行第%s个进程'%i)
    lock.release()


# 测试入口
if __name__ == '__main__':
    unfinished_thread = 0
    # 创建线程锁，用于判断线程是否全部完成
    lock = Lock()
    start_time = time.time()
    for i in range(1, 4, 1):
        try:
            # 多线程多分类同时运行
            unfinished_thread += 1
            _thread.start_new_thread(test, (i,))
        except:
            print ("Error: unable to start thread" + str(i))
    while True:
        # 等待所有线程完成
        lock.acquire()
        if unfinish