Python中多线程的创建及基本调用方法

print "=======================thread.start_new_thread启动线程============="  
import thread  
#Python的线程sleep方法并不是在thread模块中，反而是在time模块下  
import time  
def inthread(no,interval):  
  count=0  
  while count<10:  
    print "Thread-%d,休眠间隔：%d,current Time:%s"%(no,interval,time.ctime())  
    #使当前线程休眠指定时间，interval为浮点型的秒数，不同于Java中的整形毫秒数  
    time.sleep(interval)  
    #Python不像大多数高级语言一样支持++操作符，只能用+=实现  
    count+=1  
  else:  
    print "Thread-%d is over"%no  
    #可以等待线程被PVM回收，或主动调用exit或exit_thread方法结束线程  
    thread.exit_thread()  
#使用start_new_thread函数可以简单的启动一个线程,第一个参数指定线程中执行的函数，第二个参数为元组型的传递给指定函数的参数值  
thread.start_new_thread(inthread,(1,2))  
  #线程执行时必须添加这一行，并且sleep的时间必须足够使线程结束，如本例  
  #如果休眠时间改为20，将可能会抛出异常  
time.sleep(30)  
'''  

Unhandled exception in thread started by 
Error in sys.excepthook: 
Original exception was: 

import thread;  
from time import sleep,ctime;  
from random import choice  
#The first param means the thread number  
#The second param means how long it sleep  
#The third param means the Lock  
def loop(nloop,sec,lock):  
  print "Thread ",nloop," start and will sleep ",sec;  
  sleep(sec);  
  print "Thread "," end ",sec;  
  lock.release();  
  
def main():  
  seconds=[4,2];  
  locks=[];  
  for i in range(len(seconds)) :  
    lock=thread.allocate_lock();  
    lock.acquire();  
    locks.append(lock);  
      
  print "main Thread begins:",ctime();  
  for i,lock in enumerate(locks):  
    thread.start_new_thread(loop,(i,choice(seconds),lock));  
  for lock in locks :  
    while lock.locked() :   
      pass;  
  print "main Thread ends:",ctime();  
  
if __name__=="__main__" :  
  main();