Installing

pip install dry-webview

uv add dry-webview

Dry has no Python dependencies. The wheel carries the compiled extension module, so there is no Rust toolchain to install and nothing to build.

Python

CPython 3.14 or newer. Dry ships stable-ABI (abi3-py314) wheels, one per platform rather than one per Python version, so the same wheel keeps working on every later CPython. The floor buys two things the library relies on: modern typing with no typing_extensions dependency, and PEP 649 deferred annotations, which are what let Dry read a callback’s declared signature and report save_file expects str for path, received number instead rather than a raw failure from inside the Bridge. See ADR-0003.

Free-threaded builds (python3.14t) cannot install Dry: abi3 does not cover them. That changes when abi3t arrives with Python 3.15.

Platforms

Both platforms run the full test suite in CI, including tests that open a real window and drive it. Linux has no wheel, no CI job and no backend work: it is not that it is untested, it is that it is not there.

Dry uses the platform’s own web engine — WebView2 on Windows, WKWebView on macOS — so the rendering engine is the one the operating system ships and updates.

From source

Building needs a Rust toolchain and maturin:

git clone https://github.com/barradasotavio/dry
cd dry
uv run maturin develop --uv

That compiles the extension module and installs it into the environment, after which python examples/minimal.py opens a window.