使用WatchDog忽略文件

Question

我正在运行一段代码，这段代码用Python实现了一个监控程序，叫做WatchDog，用来监控文件的变化。我想记录所有的变化到一个日志文件里（叫做DoNotDelete.txt），所以我在代码中试图忽略这个DoNotDelete.txt文件。但是，当我尝试运行这段代码时（第一次传入'n'给文件，然后再更改文件），我遇到了一个错误，叫做ValueError（ValueError: conflicting patterns set(['*']) included and excluded）。

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

class MyHandler(PatternMatchingEventHandler):

    currentEvent = ""
    update = False

    def on_modified(self, event):
        super(MyHandler, self).on_modified(event)
        what = 'Directory' if event.is_directory else 'File'
        self.currentEvent = what + ", modified, " + event.src_path
        if(self.update == False):
            file = open("DoNotDelete.txt", "a+")
            file.write(self.currentEvent + "\n")
            file.close()
        else:
            print self.currentEvent

    def on_created(self, event):
        super(MyHandler, self).on_created(event)
        what = 'Directory' if event.is_directory else 'File'
        self.currentEvent = what + ", created, " + event.src_path
        if(self.update == False):
            file = open("DoNotDelete.txt", "a+")
            file.write(self.currentEvent + "\n")
            file.close()
        else:
            print self.currentEvent

    def on_deleted(self, event):
        super(MyHandler, self).on_deleted(event)
        what = 'Directory' if event.is_directory else 'File'
        self.currentEvent = what + ", deleted, " + event.src_path
        if(self.update == False):
            file = open("DoNotDelete.txt", "a+")
            file.write(self.currentEvent + "\n")
            file.close()
        else:
            print self.currentEvent

    def on_moved(self, event):
        super(MyHandler, self).on_moved(event)
        what = 'Directory' if event.is_directory else 'File'
        self.currentEvent = what + ", moved, from: " + event.src_path + ", to: " + \ 
        event.dest_path
        if(self.update == False):
            file = open("DoNotDelete.txt", "a+")
            file.write(self.currentEvent + "\n")
            file.close()
        else:
            print self.currentEvent

    def get_boolean(self, bool):
        self.update = bool

if __name__ == "__main__":
    booleanUpdate = False
    updateOrNot = raw_input("Would you like to enable auto-update (y/n): ")
    if((len(updateOrNot) == 1) and (updateOrNot.lower() == "y")):
        booleanUpdate = True
    event_handler = MyHandler(ignore_patterns='*.txt')
    event_handler.get_boolean(booleanUpdate)
    observer = Observer()
    observer.schedule(event_handler, path='.', recursive=True)
    observer.start()
    print booleanUpdate
    try:
        while True:
            time.sleep(1)
    except KeyboardInterrupt:
        observer.stop()
    observer.join()

有没有什么建议可以解决这个错误呢？

Answer 1

我觉得你应该用一个列表来存放这些模式。

class MyHandler(PatternMatchingEventHandler):

  currentEvent = ""
  update = False

  def __init__(self):
      super(MyHandler, self).__init__(ignore_patterns=["*/DoNotDelete.txt"])

  def doExtractMethods(self):
      if (self.update == False):
          file_ = open("DoNotDelete.txt", "a+")
          file_.write(self.currentEvent + "\n")
          file_.close()
      else:
          print self.currentEvent

  def on_modified(self, event):
      super(MyHandler, self).on_modified(event)
      what = 'Directory' if event.is_directory else 'File'
      self.currentEvent = what + ", modified, " + event.src_path
      self.doExtractMethods()

  def on_created(self, event):
      super(MyHandler, self).on_created(event)
      what = 'Directory' if event.is_directory else 'File'
      self.currentEvent = what + ", created, " + event.src_path
      self.doExtractMethods()

  def on_deleted(self, event):
      super(MyHandler, self).on_deleted(event)
      what = 'Directory' if event.is_directory else 'File'
      self.currentEvent = what + ", deleted, " + event.src_path
      self.doExtractMethods()

  def on_moved(self, event):
      super(MyHandler, self).on_moved(event)
      what = 'Directory' if event.is_directory else 'File'
      self.currentEvent = what + ", moved, from: " + event.src_path + ", to: "\
                          + event.dest_path
      self.doExtractMethods()

  def get_boolean(self, bool):
      self.update = bool

注意 ignore_patterns=["*/DoNotDelete.txt"] 这段代码。

可以参考 监控单个文件 和 https://github.com/gorakhargosh/watchdog/issues/99 了解更多信息。