A simple optionally-async python inotify library, focused on simplicity of use and operation, and leveraging modern Python features
An async python inotify package. Kept as simple and easy-to-understand as possible, while still being flexible and powerful. This is built on no external dependencies, and works through ctypes in a very obvious fashion.
This depends on Python 3.6+ features, and will not work with prior versions.
This works without any other external dependencies.
You know the drill:
pip install asyncinotify
The core of this package is asyncinotify.Inotify. Most important Classes may be imported directly from the asyncinotify package.
from pathlib import Path
from asyncinotify import Inotify, Mask
async def main():
# Context manager to close the inotify handle after use
with Inotify() as inotify:
# Adding the watch can also be done outside of the context manager.
# __enter__ doesn't actually do anything except return self.
# This returns an asyncinotify.inotify.Watch instance
inotify.add_watch('/tmp', Mask.ACCESS | Mask.MODIFY | Mask.OPEN | Mask.CREATE | Mask.DELETE | Mask.ATTRIB | Mask.CLOSE | Mask.MOVE | Mask.ONLYDIR)
# Iterate events forever, yielding them one at a time
async for event in inotify:
# Events have a helpful __repr__. They also have a reference to
# their Watch instance.
# the contained path may or may not be valid UTF-8. See the note
This will asynchronously watch the /tmp directory and report events it encounters.
This library also supports synchronous operation, using the asyncinotify.inotify.Inotify.sync_get` method, or simply using synchronous iteration.
There are a few different python inotify packages. Most of them either have odd conventions, expose too much of the underlying C API in a way that I personally don’t like, are badly documented, they work with paths in a non-idiomatic way, are not asynchronous, or are overengineered compared to the API they are wrapping. I find that the last one is true for the majority of them.
I encourage everybody to read the sources of this package. They are quite simple and easy to understand.
Works in a very simple way. It does not have add-ons or extra features beyond presenting a very Python interface to the raw inotify functionality.
Grabs events in bulk and caches them for minor performance gains.
Leverages IntFlag for all masks and flags, allowing the user to use the features of IntFlag, such as seeing individual applied flags in the repr, checking for flag set bits with in.
Exposes all paths via python’s pathlib
Exposes all the functionality of inotify without depending on the user having to interact with any of the underlying mechanics of Inotify. You should never have to touch the inotify or watch descriptors for any reason.
The primary motivation is that this is written to be a Python inotify module that I would feel comfortable using.
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