Sometimes it would be nice to do something when a file was written to disk.
For example a file is saved in the editor and after the file is written on disk we want to run a script or code.
Two ways to solve this:
inotify-tools via your package manager.
inotify in Python
There are some Python packages for inotify.
aionotify and is Python 3 only.
Source of aionotify: https://github.com/rbarrois/aionotify
Because inotify is kernel based this can be used to trigger events when files are uploaded to a system. When the file is closed a function is called to process the file.
import asyncio import aionotify from pathlib import Path PATH = Path("/tmp/uploads") # Setup the watcher watcher = aionotify.Watcher() watcher.watch(alias="uploads", path=str(PATH), flags=aionotify.Flags.CLOSE_WRITE) # Prepare the loop loop = asyncio.get_event_loop() def process(filename): # print first line; could do more useful stuff with open(PATH / filename) as fp: print(fp.readline()) async def work(): await watcher.setup(loop) while True: event = await watcher.get_event() print(event) process(event.name) watcher.close() loop.run_until_complete(work()) loop.stop() loop.close()
This example monitors the folder
/tmp/uploads for files written and closed.
A closed file will be opened and the first line is printed.
An example call of the script above:
Allowed flags are listed here: https://github.com/rbarrois/aionotify/blob/master/aionotify/enums.py