我需要查看日志文件中的更改。在浏览了stackoverflow问题之后,我发现人们推荐watchdog
。因此,我正在尝试测试,但不确定当文件发生更改时应将代码添加到何处:
import time
from watchdog.observers import Observer
from watchdog.events import LoggingEventHandler
if __name__ == "__main__":
event_handler = LoggingEventHandler()
observer = Observer()
observer.schedule(event_handler, path='.', recursive=False)
observer.start()
try:
while True:
time.sleep(1)
else:
print "got it"
except KeyboardInterrupt:
observer.stop()
observer.join()
如果文件已被添加/更改,我应该在while
循环中添加"got it“吗?
发布于 2013-09-04 02:48:41
定义你处理程序而不是LoggingEventHandler
:
#!/usr/bin/python
import time
from watchdog.observers import Observer
from watchdog.events import FileSystemEventHandler
class MyHandler(FileSystemEventHandler):
def on_modified(self, event):
print(f'event type: {event.event_type} path : {event.src_path}')
if __name__ == "__main__":
event_handler = MyHandler()
observer = Observer()
observer.schedule(event_handler, path='/data/', recursive=False)
observer.start()
try:
while True:
time.sleep(1)
except KeyboardInterrupt:
observer.stop()
observer.join()
当文件或目录被修改时,将调用on_modified
。
发布于 2019-07-26 21:36:17
下面是一个代码片段,可以防止它像其他人在@alecxe answer中所说的那样运行两次:
from datetime import datetime, timedelta
class MyHandler(FileSystemEventHandler):
def __init__(self):
self.last_modified = datetime.now()
def on_modified(self, event):
if datetime.now() - self.last_modified < timedelta(seconds=1):
return
else:
self.last_modified = datetime.now()
print(f'Event type: {event.event_type} path : {event.src_path}')
print(event.is_directory) # This attribute is also available
发布于 2021-02-06 00:17:40
您可以使用src_path检查逻辑,而不是datetime,因为如果检查超过1秒的datetime逻辑将失败。
class EventHandler(FileSystemEventHandler):
def __init__(self):
self.src_path = ''
def on_modified(self, event):
if self.src_path == event.src_path:
return
else:
self.src_path = event.src_path
logger.info(f"{event.event_type} occured on file {self.src_path}")
#your long processing logics goes here.
https://stackoverflow.com/questions/18599339
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