Watchfiles: Simple, modern and fast file watching for Python, written in Rust

#1

Post by Labo333 » Wed, Jul 09, 2025, 1:12 AM UTC

Watchfiles: Simple, modern and fast file watching for Python, written in Rust
github.com

Re: Watchfiles: Simple, modern and fast file watching for Python, written in Rust

#2

Post by Zaloog » Sat, Jul 12, 2025, 5:37 PM UTC

Awesome library, I use it in ayu (https://github.com/Zaloog/ayu) to watch for changes in test files, to automatically rerun those tests.

Re: Watchfiles: Simple, modern and fast file watching for Python, written in Rust

#3

Post by alkh » Sat, Jul 12, 2025, 6:40 PM UTC

There is also watchexec[1]. I like the fact that is it shipped as a sinle binary, so it's pretty easy to distribute [1]https://github.com/watchexec/watchexec

Re: Watchfiles: Simple, modern and fast file watching for Python, written in Rust

#4

Post by spease » Sat, Jul 12, 2025, 6:44 PM UTC

There are some big caveats to this approach. Note “Known Problems” for the library. Particularly, you need to use a polling backend for network / VM filesystems. I didn’t see any notes for the Python library and the fact that notify is still telling you this makes me suspect it will just fail to work in those cases.

https://docs.rs/notify/latest/notify

Re: Watchfiles: Simple, modern and fast file watching for Python, written in Rust

#5

Post by nodesocket » Sun, Jul 13, 2025, 1:08 AM UTC

alkh wrote: post #3

There is also watchexec[1]. I like the fact that is it shipped as a sinle binary, so it's pretty easy to distribute [1] https://github.com/watchexec/watchexec

Thanks for posting watchexec. Exactly what I needed for my gunicorn +gevent app. gevent does not support the --reload gunicorn flag.