python - Monitor file for an append and perform some action after the append is done -

wi've created 2 separate scripts crawl, scrape , save results csv file , upload file dropbox run manually. want monitor csv file while performing append operation , upload file once append operation over. can throw me idea or examples i'm new this. saw package named watchdog couldn't figure out how use it.

watchdog simple use. i've written sample code here, , monitor change on *.csv file. set path before using it... simple ./ works:

import time  watchdog.observers import observer watchdog.events import patternmatchingeventhandler  class changehandler(patternmatchingeventhandler):     patterns = ["*.csv"] # handle csv files      def __init__(self):         super(changehandler, self).__init__()      def process(self, event):         '''         event.event_type: type of event string.         event.src_path: source path of file system object                 triggered event         event.is_directory: true if event emitted                 directory; false otherwise.         '''         print event.event_type         print event.src_path         print event.is_directory         # upload here      def on_modified(self, event):         self.process(event)      def on_created(self, event):         self.process(event)      def on_deleted(self, event):         '''         file deleted, maybe other operations?         '''         pass  if __name__ == '__main__':     observer = observer()     observer.schedule(changehandler(), path='your_csv_folder_path_here',                       recursive=true)     observer.start()     while true:         time.sleep(1)