PyO3

Magnus is a Rust library for integrating Rust with Ruby. It lets developers write Ruby extension gems in Rust or call Ruby code from a Rust binary, with bindings for defining Ruby functions and methods, calling Ruby methods, and converting values between the languages. Rust structs and enums can be wrapped as Ruby objects using the `#[magnus::wrap]` macro or the `TypedData` trait; functions and methods support automatic type conversion and return Ruby-style argument or type errors when conversions fail.

MicroPython is a lean implementation of Python 3 designed to run on microcontrollers and other constrained environments. It provides a compiler and runtime with an interactive REPL, script execution from a built-in filesystem, a subset of the Python standard library, and hardware-specific modules such as `machine` for low-level device access. The implementation is written in C99, supports multiple architectures, and uses features including a mark-sweep garbage collector, frozen bytecode, a native machine-code emitter, and configurable compile-time options to fit within limited code space and RAM. MicroPython is open-source software released primarily under the MIT license and is developed openly on GitHub; the project also provides the pyboard, an official microcontroller board for running it on bare metal.

Ruff is a Python linter and code formatter written in Rust and developed by Astral. It provides a common interface for linting and formatting, with built-in rules, automatic fixes such as removing unused imports, caching for unchanged files, pyproject.toml configuration, hierarchical configuration for monorepos, and editor integrations. Ruff is designed as a replacement for tools including Flake8, Black, isort, pydocstyle, pyupgrade, and autoflake, and supports Python 3.15.

GPUI is a UI framework for Rust. It was used in an experiment to rebuild T3 Code.

The Python Package Index (PyPI) is the official repository of software for the Python programming language, hosting packages that developers can publish and install via Python package managers. It serves as the central distribution point for Python libraries and tools, providing package metadata, releases, and download endpoints.