watchfiles

1 · Python Developer Tooling Handbook – pydevtools.com · July 11, 2026, 1:40 p.m.
Python file-watching CLI Rust
Summary
Watchfiles is a file-watching library and CLI for Python that utilizes Rust’s notify crate for filesystem event notifications, offering both synchronous and asynchronous Python APIs. It serves as the file watcher for uvicorn’s --reload mode.
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