python 多线程笔记

    while True:
        line = fileInfo.readline()
        if line:
            threadPool.submit(task,line,q,noFile,okFile)
        else:
            threadPool.shutdown()
            isStop = True
            noFile.close()
            okFile.close()
            fileInfo.close()
            break

如上代码，线程池提交任务，默认读到的line为空时退出while循环，此时主线程终止，程序退出，调用shutDown（）方法等待线程池中的任务执行完再退出程序，shutDown源码如下，默认等待，可以设置为不等待

    def shutdown(self, wait=True):
        with self._shutdown_lock:
            self._shutdown = True
            self._work_queue.put(None)
        if wait:
            for t in self._threads:
                t.join(sys.maxint)