python 多線程 thread 加鎖（二）

thread.start_new_thread(function,args[,kwargs])函數原型，其中function參數是你將要調用的線程函數名稱沒有括號；
args是講傳遞給你的線程函數的參數，他必須是個tuple類型；而kwargs是可選的參數，如果沒有參數，也一定是()

import thread
from time import sleep
from time import ctime

loops = [2,4]

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

def main():
    print 'start main 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[i], locks[i]))

    for i in nloops:
        while locks[i].locked():
            pass

    print 'end all at:', ctime()

if __name__ == '__main__':
    main()

運行結果：
start main at: Sat May 07 11:17:43 2016
start loop 0 at:start loop Sat May 07 11:17:43 20161
at: Sat May 07 11:17:43 2016
end loop 0 at: Sat May 07 11:17:45 2016
end loop 1 at: Sat May 07 11:17:47 2016
end all at: Sat May 07 11:17:47 2016