I have a need to watch a log file for changes. After looking through stackoverflow questions, I see people recommending watchdog
. So I'm trying to test, and am not sure where to add the code for when files change:
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()
Where do I add the "got it" — in the while
loop if the files have been added/changed?
Instead of LoggingEventHandler
define your handler:
#!/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()
on_modified
is called when a file or directory is modified.