基礎概念

inotify 是取用 linux 底下的系統自動監聽檔案變化的方式，
pyinotify 就是他的 python 版本實作，
當我們獲得了系統給的 event，我們會得到該檔案的「絕對路徑」，
我們就能再進一步依照此絕對路徑做對應的資料操作。

注意：inotify的功能目前只在 linux 系統能使用，mac 上不能使用哦~ (自己親自測試過QQ)

使用範例

pyinotify 做到的效果就是：如果當某個資料夾底下有資料變化，
舉一些例子例如：
– 新增：process_IN_CREATE
– 修改：process_IN_MODIFY
– 刪除：process_IN_DELETE
– 資料被開啟：process_IN_OPEN
– 資料屬性變化：process_IN_ATTRIB (可搭配touch使用，獲得目標檔案路徑)

Sample Code

import pyinotify

class MyEventHandler(pyinotify.ProcessEvent):

    def process_IN_ACCESS(self, event):
        print("ACCESS event:", event.pathname)

    def process_IN_ATTRIB(self, event):
        print("ATTRIB event:", event.pathname)

    def process_IN_CLOSE_NOWRITE(self, event):
        print("CLOSE_NOWRITE event:", event.pathname)

    def process_IN_CLOSE_WRITE(self, event):
        print("CLOSE_WRITE event:", event.pathname)

    def process_IN_CREATE(self, event):
        print("CREATE event:", event.pathname)

    def process_IN_DELETE(self, event):
        print("DELETE event:", event.pathname)

    def process_IN_MODIFY(self, event):
        print("MODIFY event:", event.pathname)

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


if __name__ == '__main__':

    # To specify two or more events codes just orize them
    # pyinotify_flags = pyinotify.IN_CREATE | pyinotify.IN_DELETE | pyinotify.IN_MODIFY 
    # Or if you want to be notified for all events just use this shortcut
    pyinotify_flags = pyinotify.ALL_EVENTS

    # watch manager
    wm = pyinotify.WatchManager()
    watch_path = '/home/ubuntu/Desktop/'
    wm.add_watch(watch_path, pyinotify_flags, rec=True) # rec = recursive

    # event handler
    eh = MyEventHandler()

    # notifier
    notifier = pyinotify.Notifier(wm, eh)
    notifier.loop()