父线程,没有等子线程执行完就退出

# -*- coding: utf-8 -*-
import threading
from time import ctime,sleep


def music(func):
    for i in range(3):
        print "I was listening to %s. %s" %(func,ctime())
        sleep(2)

def move(func):
    for i in range(5):
        print "I was at the %s! %s" %(func,ctime())
        sleep(5)

threads = []
t1 = threading.Thread(target=music,args=(u'爱情买卖',))
threads.append(t1)
t2 = threading.Thread(target=move,args=(u'阿凡达',))
threads.append(t2)

if __name__ == '__main__':
    for t in threads:
        #t.setDaemon(True)
        t.start()
    t.join()
    print "all over %s" %ctime()
	

C:Python27python.exe C:/Users/TLCB/PycharmProjects/untitled/mycompany/Django/a4.py
I was listening to 爱情买卖. Sat Oct 14 13:15:54 2017
I was at the 阿凡达! Sat Oct 14 13:15:54 2017
I was listening to 爱情买卖. Sat Oct 14 13:15:56 2017
I was listening to 爱情买卖. Sat Oct 14 13:15:58 2017
I was at the 阿凡达! Sat Oct 14 13:15:59 2017
I was at the 阿凡达! Sat Oct 14 13:16:04 2017
I was at the 阿凡达! Sat Oct 14 13:16:09 2017
I was at the 阿凡达! Sat Oct 14 13:16:14 2017
all over Sat Oct 14 13:16:19 2017

Process finished with exit code 0

	
此时是并行执行,执行的时间是25S

# -*- coding: utf-8 -*-
import threading
from time import ctime,sleep


def music(func):
    for i in range(3):
        print "I was listening to %s. %s" %(func,ctime())
        sleep(2)

def move(func):
    for i in range(5):
        print "I was at the %s! %s" %(func,ctime())
        sleep(5)

threads = []
t1 = threading.Thread(target=music,args=(u'爱情买卖',))
threads.append(t1)
t2 = threading.Thread(target=move,args=(u'阿凡达',))
threads.append(t2)

if __name__ == '__main__':
    for t in threads:
        #t.setDaemon(True)
        t.start()
        t.join()
    print "all over %s" %ctime()

C:Python27python.exe C:/Users/TLCB/PycharmProjects/untitled/mycompany/Django/a4.py
I was listening to 爱情买卖. Sat Oct 14 13:17:10 2017
I was listening to 爱情买卖. Sat Oct 14 13:17:12 2017
I was listening to 爱情买卖. Sat Oct 14 13:17:14 2017
I was at the 阿凡达! Sat Oct 14 13:17:16 2017
I was at the 阿凡达! Sat Oct 14 13:17:21 2017
I was at the 阿凡达! Sat Oct 14 13:17:26 2017
I was at the 阿凡达! Sat Oct 14 13:17:31 2017
I was at the 阿凡达! Sat Oct 14 13:17:36 2017
all over Sat Oct 14 13:17:41 2017

Process finished with exit code 0



此时是串行,花了31S




# -*- coding: utf-8 -*-
import threading
from time import ctime,sleep


def music(func):
    for i in range(3):
        print "I was listening to %s. %s" %(func,ctime())
        sleep(2)

def move(func):
    for i in range(5):
        print "I was at the %s! %s" %(func,ctime())
        sleep(5)

threads = []
t1 = threading.Thread(target=music,args=(u'爱情买卖',))
threads.append(t1)
t2 = threading.Thread(target=move,args=(u'阿凡达',))
threads.append(t2)

if __name__ == '__main__':
    for t in threads:
        t.setDaemon(True)
        t.start()
        #t.join()
    print "all over %s" %ctime()
	
C:Python27python.exe C:/Users/TLCB/PycharmProjects/untitled/mycompany/Django/a4.py
I was listening to 爱情买卖. Sat Oct 14 13:21:49 2017
I was at the 阿凡达! Sat Oct 14 13:21:49 2017
 all over Sat Oct 14 13:21:49 2017

Process finished with exit code 0


此时父线程,没有等子线程执行完就退出了