多线程

#encoding:utf-8
from multiprocessing import Process
import os, time, random

def r1(process_name):
for i in range(5):
print process_name, os.getpid() #打印出当前进程的id
time.sleep(random.random())
def r2(process_name):
for i in range(5):
print process_name, os.getpid() #打印出当前进程的id
time.sleep(random.random()*2)

if __name__ == "__main__":
print "main process run..."
p1 = Process(target=r1, args=(‘process_name1‘, ))
p2 = Process(target=r2, args=(‘process_name2‘, ))

p1.start()
p2.start()
p1.join()
#p2.join()
print "main process runned all lines..."