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

Project description


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


Source Code:

Underlying file system notifications are handled by the Notify rust library.

This package was previously named "watchgod", see the migration guide for more information.


watchfiles requires Python 3.7 - 3.10.

pip install watchfiles

Binaries are available for:

  • Linux: x86_64, aarch64, i686, armv7l, musl-x86_64 & musl-aarch64
  • MacOS: x86_64 & arm64 (except python 3.7)
  • Windows: amd64 & win32

Otherwise, you can install from source which requires Rust stable to be installed.


Here are some examples of what watchfiles can do:

watch Usage

from watchfiles import watch

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

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'):

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__':

See arun_process docs for more details.


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

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