rextio 0.1.3

Alpha hybrid build tooling for typed Python functions.

Rextio

Rextio 0.1.3 is an alpha-stage local build tool for Python projects (published to PyPI on 2026-07-17 with plugin API 1.3 and tooling contract 2.1.0; supersedes 0.1.2, which emitted tooling contract 2.0.0).

pip install rextio

It analyzes typed Python code, compiles eligible hot-path functions to Rust native modules, and keeps unsupported or unsafe code on the Python fallback path. The goal is to let Python projects adopt Rust acceleration selectively without rewriting the whole project.

Rextio can:

• discover native candidates automatically or through @rextio.native
• keep selected functions on fallback with @rextio.exempt
• generate Rust/PyO3 code for accepted functions
• generate Python wrappers that preserve normal import paths
• fall back to Python when native code is unavailable or disabled
• build hybrid artifacts, zipapp executables, Nuitka executables, standalone native Rust binaries, and optional Rust-importable crates
• select and version-pin the exact cargo, maturin, Nuitka, and CPython a build uses ([toolchain] in rextio.toml)

Rextio is not a Python replacement and does not attempt full Python semantics or whole-project Rust migration. Native compilation is an optimization; Python fallback behavior remains the correctness baseline.

Project repository: https://github.com/rextio/rextio

Author: Steve Si-young Song [e-mail] — X (Twitter): @RextioDev