论多线程python2与python3

python3 常用线程

# -*- coding: utf-8 -*-
import time
from threading import Thread


def test(i):
    while True:
        print("i",i+1)
        time.sleep(1)
        i+=1
        if i == 5:
            break
print(1)
t = Thread(target=test, args=(0,))
#t.setDaemon(True)
t.start()
print("---",2)

主线程一直运行，遇到循环耗时操作分出子线程，主线程运行到最后等待子线程结束，再进行关闭

python2.7 thread方法

# -*- coding: utf-8 -*-
import time
# from threading import Thread
import thread

def test(i):
    while True:
        print "i",i+1
        time.sleep(1)
        i+=1
        if i == 5:
            break
print 1
thread.start_new_thread(test, (0,))
# t = Thread(target=test, args=(0,))
# t.start()
print "---",2

主线程运行到最后就结束，相当于python3中设置了守护进行，如上注释部分所示