创建新文件时运行python脚本

Question

我有一个存储一堆jpg图像的文件夹.当一个新图像添加到此文件夹时,我需要在其上运行python脚本.

这可能吗？如果是这样,怎么样？我看到的一个可能的解决方案是pyinotify,但没有看到任何可靠的例子.

Answer 1

我认为看门狗库在这里使用更好的东西,就像creimers提到的那样.我使用它如下监视新文件的文件夹:

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()