Question

我正在尝试创建一个监视目录以进行更改的程序。将文件添加到相关目录时，FileHandler（FileSystemEventHandler的子类）将文件路径添加到队列中。一个名为ConsumeQueue的独立进程将定期检查队列中的项目。如果找到一个项目，它将从队列中获取文件路径并将其打印到控制台。以下是该程序的源代码：

import time
from watchdog.observers import Observer
from watchdog.events import FileSystemEventHandler
from Queue import Empty
from multiprocessing import Process, Queue

class FileHandler(FileSystemEventHandler):
def __init__(self, q):
    super(FileHandler, self).__init__()
    self.q = q

def on_modified(self, event):
    if not event.is_directory and not 'thumbnail' in event.src_path:
        print "Created: " + event.src_path
        self.q.put(event.src_path)
        print 'Added', event.src_path, 'to queue', 'Queue size is now', self.q.qsize()

class ConsumeQueue(Process):
    def __init__(self, q):
        super(ConsumeQueue, self).__init__()
        print 'Initializing'
        self.q = q 

    def run(self):
        print 'Running'
        while True:
            try:
                value =  self.q.get(False)
                print 'Removed', value, 'from queue', 'Queue size is now', self.q.qsize()

            except Empty:
                print 'Nothing to process'
                time.sleep(3)


if __name__ == "__main__":
    q = Queue()

    path = 'C:\path'
    event_handler = FileHandler(q)
    observer = Observer()
    observer.schedule(event_handler, path, recursive=True)
    observer.start()

    consumer = ConsumeQueue(q)
    consumer.start()

    observer.join()
    consumer.join()

问题在于，虽然观察者似乎在向队列添加项目，但消费者根本没有运行。我认为调用consumer.start（）至少会让它运行起来。我的计划有什么问题？

编辑 - 修正了缩进。

带有Process的Python FileSystemEventHandler

0 个答案: