使用一个循环，不断的创建线程，直到出现异常，才通知它们。python真是个好东西。

代码如下：

#!/usr/bin/env python
#coding=gbk

import threading
import time, random,  sys

class Counter:
    def __init__(self):
        self.lock = threading.Lock()
        self.value = 0

    def increment(self):
        self.lock.acquire() 
        self.value = value = self.value + 1
        self.lock.release()
        return value

counter = Counter()
cond = threading.Condition()

class Worker(threading.Thread):

    def run(self):
        print self.getName(),  "-- created."
        cond.acquire()
        #for i in range(10):
            # pretend we're doing something that takes 10?00 ms
            #value = counter.increment() 
            # time.sleep(random.randint(10, 100) / 1000.0)
        cond.wait()
        #print self.getName(), "-- task", "finished" 
        cond.release()
        


if __name__ == '__main__':
    
        try:
            for i in range(3500):
                Worker().start() # start a worker
        except BaseException,  e:
            print "异常: ", type(e),  e
            time.sleep(5)
            print "maxium i=",  i
        finally:
            cond.acquire()
            cond.notifyAll()
            cond.release()
            time.sleep(3)
            print threading.currentThread().getName(),  " quit"

以下是python2.7在XP下的运行结果，可能跟具体的机器物理配置也有关系。

...........
Thread-1021 -- created.
Thread-1022 -- created.
Thread-1023 -- created.
Thread-1024 -- created.
Thread-1025 -- created.
Thread-1026 -- created.
异常:  <class 'thread.error'> can't start new thread
Thread-1027 -- created.
maxium i= 1027
MainThread  quit

最终只能创建1027个线程。

我后来使用python2.5.2来测了一下，也只能创建1029个线程。

储位朋友有兴趣，可以使用它来测测不同平台下，最多能创建多少个线程。

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