如何运行一个函数,当Python看门狗的目录中的任何变化? [英] How to run an function when anything changes in a dir with Python Watchdog?
问题描述
我试图使用看门狗运行同步脚本,只要在dir中有任何更改(除了为一个特定的文件)。我简单地复制了自述文件中的代码(粘贴在下面),这就是它所说的;记录哪个文件已经改变。
pre $ 导入sys
导入时间
导入日志
from watchdog .observers从watchdog.events导入Observer
导入LoggingEventHandler
$ b如果__name__ ==__main__:
logging.basicConfig(level = logging.INFO,
format = '%(asctime)s - %(message)s',
datefmt ='%Y-%m-%d%H:%M:%S')
path = sys.argv [1 ] if len(sys.argv)> 1 else'。'
event_handler = LoggingEventHandler()
observer = Observer()
observer.schedule(event_handler,path,recursive = True)
observer.start()
尝试:
,而真:
time.sleep(1)
除了KeyboardInterrupt:
observer.stop()
observer.join()
现在我想运行一个函数(将整个文件夹同步到远程机器),只要有任何改变。所以我用自己的函数替换了 event_handler
。但是,这给了我以下错误:
pre $ Traceback(最近调用最后一次):
文件/ System / Library /Frameworks/Python.framework/Versions/2.7/lib/python2.7/threading.py,第810行,在__bootstrap_inner
self.run()
文件/Library/Python/2.7/site在运行
self.dispatch_events(self.event_queue,self.timeout)
文件/Library/Python/2.7/site-packages/ $ b $ handler.dispatch(event)
AttributeError:'function'对象没有属性'dispatch'
有人知道我在做什么错吗?所有提示都欢迎!
ps。我也想排除文件夹中的一个文件被观看。任何想法,我应该这样做?
您需要子类和做任何你想要的调度:
导入sys
导入时间
导入日志记录$ b $ from watchdog.observers导入Observer
from watchdog。事件导入LoggingEventHandler
$ b $ class Event(LoggingEventHandler):
def dispatch(self,event):
print(Foobar)
if __name__ = =__main__:
logging.basicConfig(level = logging.INFO,
format ='%(asctime)s - %(message)s',
datefmt ='%Y-% m-%d%H:%M:%S')
path = sys.argv [1] if len(sys.argv)> 1 else'。'
event_handler = Event()
observer = Observer()
observer.schedule(event_handler,path,recursive = True)
observer.start()
尝试:
,而真:
time.sleep(1)
除了KeyboardInterrupt:
observer.stop()
observer.join()
如果你运行代码,你会看到 Foobar
检测到更改,忽略您可能需要使用[events.PatternMatchingEventHandler] [1]的文件。每一个都有各种各样的方法
为了在某些事情被修改的情况下做某些事情,我们可以覆盖 on_modified
: p>
class Event(LoggingEventHandler):
def on_modified(self,event):
print(Doh)
使用 event_handler = Event() / code>和更改文件会输出如下内容:
Doh
Doh
Doh
Doh
Doh
Doh
Doh
2015-10-03 15:33:55 - 创建文件:./test.txt___jb_bak___
2015-10 -03 15:33:55 - 移动文件:从./test.txt到./test.txt___jb_old___
2015-10-03 15:33:55 - 移动文件:从./test.txt___jb_bak___到./ test.txt
2015-10-03 15:33:55 - 删除文件:./test.txt___jb_old___
Doh
[1]: http:// pythonhosted .ORG /看门狗/ api.html#watchdog.events.PatternMatchingEventHandler EventHandler
类可以覆盖,这一切都取决于你想要做什么。 LoggingEventHandler
class itslef是 watchdog.events.FileSystemEventHandler
的子类:
class watchdog.events.FileSystemEventHandler
基础:object
Base文件系统事件处理程序,您可以从中覆盖方法。
调度(事件)
将事件分派给适当的方法。
参数:event(FileSystemEvent) - 表示文件系统事件的事件对象。
on_any_event(event)
Catch-all事件处理程序。
参数:event(FileSystemEvent) - 表示文件系统事件的事件对象。
on_created(event)
当文件或目录
$ b
参数:event(DirCreatedEvent或FileCreatedEvent) - 表示文件/目录创建的事件。
on_deleted(event)
当文件或目录被删除。
$ p $
参数:event(DirDeletedEvent或FileDeletedEvent) - 表示文件/目录删除的事件。
on_modified(event)
当文件或目录被修改。
参数:event(DirModifiedEvent或FileModifiedEvent) - 表示文件/目录修改的事件。
on_moved(event)
当文件或目录被移动或重命名。
$ b
参数:event(DirMovedEvent或FileMovedEvent) - 表示文件/目录移动的事件。
I'm trying to use watchdog to run a sync script whenever anything changes in a dir (except for one specific file). I simply copied the code from the readme (pasted below), which does what it says; log which file has changed.
import sys
import time
import logging
from watchdog.observers import Observer
from watchdog.events import LoggingEventHandler
if __name__ == "__main__":
logging.basicConfig(level=logging.INFO,
format='%(asctime)s - %(message)s',
datefmt='%Y-%m-%d %H:%M:%S')
path = sys.argv[1] if len(sys.argv) > 1 else '.'
event_handler = LoggingEventHandler()
observer = Observer()
observer.schedule(event_handler, path, recursive=True)
observer.start()
try:
while True:
time.sleep(1)
except KeyboardInterrupt:
observer.stop()
observer.join()
I now want to run a function (which syncs the whole folder to a remote machine) whenever anything changes. So I just replaced event_handler
with my own function. But that gives me the following error:
Traceback (most recent call last):
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/threading.py", line 810, in __bootstrap_inner
self.run()
File "/Library/Python/2.7/site-packages/watchdog/observers/api.py", line 199, in run
self.dispatch_events(self.event_queue, self.timeout)
File "/Library/Python/2.7/site-packages/watchdog/observers/api.py", line 368, in dispatch_events
handler.dispatch(event)
AttributeError: 'function' object has no attribute 'dispatch'
Does anybody know what I'm doing wrong here? All tips are welcome!
ps. I also want to exclude one file in the folder from being watched. Any ideas how I should do that?
You need to subclass and do whatever you want in dispatch:
import sys
import time
import logging
from watchdog.observers import Observer
from watchdog.events import LoggingEventHandler
class Event(LoggingEventHandler):
def dispatch(self, event):
print("Foobar")
if __name__ == "__main__":
logging.basicConfig(level=logging.INFO,
format='%(asctime)s - %(message)s',
datefmt='%Y-%m-%d %H:%M:%S')
path = sys.argv[1] if len(sys.argv) > 1 else '.'
event_handler = Event()
observer = Observer()
observer.schedule(event_handler, path, recursive=True)
observer.start()
try:
while True:
time.sleep(1)
except KeyboardInterrupt:
observer.stop()
observer.join()
If you run the code you will see Foobar
outputted whenever a change is detected, to ignore files you may need to use [events.PatternMatchingEventHandler][1]. There are various methods in each
To do something when a something is modified case we can override on_modified
:
class Event(LoggingEventHandler):
def on_modified(self, event):
print("Doh")
And running the code using the class above with event_handler = Event()
and changing a file will output something like:
Doh
Doh
Doh
Doh
Doh
Doh
Doh
2015-10-03 15:33:55 - Created file: ./test.txt___jb_bak___
2015-10-03 15:33:55 - Moved file: from ./test.txt to ./test.txt___jb_old___
2015-10-03 15:33:55 - Moved file: from ./test.txt___jb_bak___ to ./test.txt
2015-10-03 15:33:55 - Deleted file: ./test.txt___jb_old___
Doh
[1]: http://pythonhosted.org/watchdog/api.html#watchdog.events.PatternMatchingEventHandler EventHandler
class you can override, it all depends on what it is you want to do. The LoggingEventHandler
class itslef is a subclass of watchdog.events.FileSystemEventHandler
:
class watchdog.events.FileSystemEventHandler Bases: object
Base file system event handler that you can override methods from.
dispatch(event) Dispatches events to the appropriate methods.
Parameters: event (FileSystemEvent) – The event object representing the file system event.
on_any_event(event) Catch-all event handler.
Parameters: event (FileSystemEvent) – The event object representing the file system event.
on_created(event) Called when a file or directory is created.
Parameters: event (DirCreatedEvent or FileCreatedEvent) – Event representing file/directory creation.
on_deleted(event) Called when a file or directory is deleted.
Parameters: event (DirDeletedEvent or FileDeletedEvent) – Event representing file/directory deletion.
on_modified(event) Called when a file or directory is modified.
Parameters: event (DirModifiedEvent or FileModifiedEvent) – Event representing file/directory modification.
on_moved(event) Called when a file or a directory is moved or renamed.
Parameters: event (DirMovedEvent or FileMovedEvent) – Event representing file/directory movement.
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