我认为看守者库是在这里使用的更好的东西，就像火葬者所提到的那样。我已使用它如下监视新文件的文件夹：
import time
from watchdog.observers import Observer
from watchdog.events import FileSystemEventHandler
class ExampleHandler(FileSystemEventHandler):
def on_created(self, event): # when file is created
# do something, eg. call your function to process the image
print "Got event for file %s" % event.src_path
observer = Observer()
event_handler = ExampleHandler() # create event handler
# set observer to use created handler in directory
observer.schedule(event_handler, path='/folder/to/watch')
observer.start()
# sleep until keyboard interrupt, then stop + rejoin the observer
try:
while True:
time.sleep(1)
except KeyboardInterrupt:
observer.stop()
observer.join()
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