Hands-On Reactive Programming with Python

Monitoring file changes with inotify

Fortunately, there is already a Python package that exposes the inotify features with Asyncio—aionotify. This package is available on pypi and can be installed with pip (as usual from your virtualenv):

pip3 install aionotify

The aionotify API is simple to use (by the way, the original inotify API is already simple for a C API), and access to the events leverages coroutines and the await notation. See the following example:

import asyncioimport aionotify# Setup the watcherwatcher = aionotify.Watcher()watcher.watch(alias='test', path='/tmp/foo.txt', flags=    aionotify.Flags.OPEN     | aionotify.Flags.CLOSE_WRITE     | aionotify.Flags.ACCESS     | aionotify.Flags.MODIFY)# Prepare the looploop = asyncio.get_event_loop() ...