【python核心编程】线程和锁的问题

壮乡小顽主

python核心编程书上的脚本如下：

import thread
from time import ctime, sleep

loops = [4, 2]

def loop(nloop, nsec, lock):
    print 'start loop', nloop, 'at:', ctime()
    sleep(nsec)
    print 'loop', nloop, 'done at:', ctime()
    lock.release()


def main():
    print 'starting at:', ctime()
    locks = []
    nloops = range(len(loops))

   
    for i in nloops:
        lock = thread.allocate_lock()
        lock.acquire()
        locks.append(lock)
   
    for i in nloops:
        thread.start_new_thread(loop, (i, loops, locks))

    print 'to here 2'
    for i in nloops:
        while locks.locked():pass
   

    print 'all DONE at:', ctime()

if __name__ == '__main__':
    main()

在python2.6上运行后报错，见截图。通过打印确定问题出在thread.start_new_thread(loop, (i, loops, locks))，麻烦高手解释一下为什么，十分感谢！脚本里的[]出不来，请看截图。

majiayang2012

为么，我这贴了你的程序上去可以运行啊

壮乡小顽主

啊?难道我的环境有问题?神奇~回复 2# majiayang2012


   

majiayang2012

错误上是你的环境问题吧，我这可以运行

administrator@ubuntu:~$ python test.py
starting at: Wed Aug 15 17:10:44 2012
to here 2
start loop 1 at: Wed Aug 15 17:10:44 2012
start loop 0 at: Wed Aug 15 17:10:44 2012
loop 1 done at: Wed Aug 15 17:10:46 2012
loop 0 done at: Wed Aug 15 17:10:48 2012
all DONE at: Wed Aug 15 17:10:48 2012

壮乡小顽主

谢谢帮助回复 4# majiayang2012


   

linux_c_py_php

什么破书, 错误百出.

1. # -*- coding:gb2312 -*-
   
2. 
   
3. import thread
   
4. from time import ctime, sleep
   
5. 
   
6. loops = [4, 2]
   
7. 
   
8. def loop(nloop, nsec, lock):
   
9.     print 'start loop', nloop, 'at:', ctime()
   
10.     sleep(nsec)
    
11.     print 'loop', nloop, 'done at:', ctime()
    
12.     lock.release()
    
13. 
    
14. 
    
15. def main():
    
16.     print 'starting at:', ctime()
    
17.     locks = []
    
18.     nloops = range(len(loops))
    
19. 
    
20.    
    
21.     for i in nloops:
    
22.         lock = thread.allocate_lock()
    
23.         lock.acquire()
    
24.         locks.append(lock)
    
25.    
    
26.     for i in nloops:
    
27.         thread.start_new_thread(loop, (i, 5, locks[i]))
    
28. 
    
29.     print 'to here 2'
    
30.     for i in nloops:
    
31.         while locks[i].locked():
    
32.             pass
    
33. 
    
34.     print 'all DONE at:', ctime()
    
35. 
    
36. if __name__ == '__main__':
    
37.     main()

复制代码

bikong0411

上面的在胡扯啊，还神马破书，有能耐你去写一本破书