core.py 文件源码

def _kill_workers(task_queue, num_workers):
    '''
    Sends a NoneType poision pill to all active workers.

    Args:
        task_queue (JoinableQueue): The task queue upon which
            to put the poision pills
        num_workers (int): The number of workers, which translates
            to the number of poision pills to put in the queue
    '''

    for w in range(num_workers): task_queue.put(None)