File monitoring: for monitoring whether a specified file has been accessed or modified

filewatch.py

import pyinotify

filechange_history = []

class MyEventHandler(pyinotify.ProcessEvent):

    def process_IN_ACCESS(self, event)::
        filechange_history.append("ACCESS")
        print("ACCESS EVENT:  ", event.pathname)
 
    def process_IN_ATTRIB(self, event):
        filechange_history.append("ATTRIB")
        print("ATTRIB CHANGE EVENT:", event.pathname)
 
    def process_IN_CREATE(self, event):
        filechange_history.append("CREATE")
        print("CREATE EVENT:", event.pathname)
 
 
    def process_IN_DELETE(self, event):
        filechange_history.append("DELETE")
        print("DELETE EVENT:", event.pathname)
 
 
    def process_IN_MODIFY(self, event):
        filechange_history.append("MODIFY")
        print("MODIFY EVENT:", event.pathname)


    def process_IN_OPEN(self, event):
        filechange_history.append("OPEN")
        print("OPEN EVENT:", event.pathname)


def file_observer():
    monitor_obj = pyinotify.WatchManager()
    monitor_obj.add_watch("/flag", pyinotify.ALL_EVENTS, rec=True)
    
    # event handler
    event_handler= MyEventHandler()

    # notifier
    monitor_loop= pyinotify.Notifier(monitor_obj, event_handler)
    monitor_loop.loop()


if __name__ == '__main__':
    file_observer()