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Description:

watchfiles 0.24.0

watchfiles

Simple, modern and high performance file watching and code reload in python.

Documentation: watchfiles.helpmanual.io
Source Code: github.com/samuelcolvin/watchfiles

Underlying file system notifications are handled by the Notify rust library.
This package was previously named "watchgod",
see the migration guide for more information.
Installation
watchfiles requires Python 3.8 - 3.13.
pip install watchfiles

Binaries are available for:

Linux: x86_64, aarch64, i686, armv7l, musl-x86_64 & musl-aarch64
MacOS: x86_64 & arm64
Windows: amd64 & win32

Otherwise, you can install from source which requires Rust stable to be installed.
Usage
Here are some examples of what watchfiles can do:
watch Usage
from watchfiles import watch

for changes in watch('./path/to/dir'):
print(changes)

See watch docs for more details.
awatch Usage
import asyncio
from watchfiles import awatch

async def main():
async for changes in awatch('/path/to/dir'):
print(changes)

asyncio.run(main())

See awatch docs for more details.
run_process Usage
from watchfiles import run_process

def foobar(a, b, c):
...

if __name__ == '__main__':
run_process('./path/to/dir', target=foobar, args=(1, 2, 3))

See run_process docs for more details.
arun_process Usage
import asyncio
from watchfiles import arun_process

def foobar(a, b, c):
...

async def main():
await arun_process('./path/to/dir', target=foobar, args=(1, 2, 3))

if __name__ == '__main__':
asyncio.run(main())

See arun_process docs for more details.
CLI
watchfiles also comes with a CLI for running and reloading code. To run some command when files in src change:
watchfiles "some command" src

For more information, see the CLI docs.
Or run
watchfiles --help