python进程&线程

# -*- coding:UTF-8 -*-
'''
Created on 2015年10月25日

@author: young
'''

import os
import threading
import time
print '多进程创建'
print 'Process (%s) start...' % os.getpid()
s=1111;
pid = os.fork()
if pid==0:
    s=222
    print 'I am child process (%s) and my parent is %s.' % (os.getpid(), os.getppid())
    
     
else:
    s=333
    print 'I (%s) just created a child process (%s).' % (os.getpid(), pid)
    
    
print s


print '创建跨平台的多进程'
from multiprocessing import Process
import os

 #子进程要执行的代码'
def run_proc(name):
    print 'Run child process %s (%s)...' % (name, os.getpid())


print 'Parent process %s.' % os.getpid()
p = Process(target=run_proc, args=('test',))
print 'Process will start.'
p.start()
p.join()
print 'Process end.'
    
    
    

print '###########多线程#################'
def task():
    print "%s is running "% (threading.current_thread().name,) 
    for i in range(5):
        print "%s --> %d"%(threading.current_thread().name,i)
        
        time.sleep(1)#暂停1秒
        
    print "%s end..." % (threading.current_thread().name,)
     


print "%s is running "% (threading.current_thread().name,) 
th=threading.Thread(target=task,name="new thread")

th.start()
th.join()#加入到主线程中，等子线程结束后再结束主线程
print "%s end..." % (threading.current_thread().name,)




print '###################'