Question

我需要帮助才能在修改文件时调用my_custom_function。我还想拥有file_change，file_delete等文件的状态。我使用了看门狗，它支持预定义函数作为schedule（）的第一个参数。我应该可以进行自定义调用并对其进行一些操作。我的用例是使用watchdog在文件修改之前和文件修改之后获取文件内容。

import sys
import time
import logging
from watchdog.observers import Observer
import os

def my_custom_function():
    print "---"

if __name__ == "__main__":
    logging.basicConfig(level=logging.INFO,
                        format='%(asctime)s - %(message)s',
                        datefmt='%Y-%m-%d %H:%M:%S')
    path = os.path.abspath(".")
    my_event = my_custom_function()
    observer = Observer()
    observer.schedule(my_event, path, recursive=True)
    observer.start()
    try:
        while True:
            time.sleep(1)
    except KeyboardInterrupt:
        observer.stop()
    observer.join()

Answer 1

希望以下代码能够回答您的问题。

import sys
import time
import watchdog
from watchdog.observers import Observer
from watchdog.events import PatternMatchingEventHandler
import time
from threading import Thread

class MyHandler(PatternMatchingEventHandler):

    def process(self, event):
        print "I am being processed"

    def on_modified(self, event):
        print "file modified " + event.src_path
        self.process(event)

    def on_created(self, event):
        print "file created" + event.src_path
        self.process(event)

    def on_moved(self, event):
        print "file moved" + event.src_path
        self.process(event)

    def on_deleted(self, event):
        print "file deleted" + event.src_path
        self.process(event)

if __name__ == '__main__':
    args = sys.argv[1:]  
    observer = Observer()
    observer.schedule(MyHandler(), path=args[0] if args else '.')
    print "Start"
    observer.start()

    try:
        while True:
            time.sleep(1)
    except KeyboardInterrupt:
        observer.stop()

    observer.join()

了解更多信息http://pythonhosted.org/watchdog/api.html

如何在修改文件时调用自定义函数以及事件？

1 个答案: