This repository provides 'Diagrams', a Python library that lets you define cloud system architecture diagrams as Python code. It renders diagrams using Graphviz, supporting a wide range of cloud providers (AWS, Azure, GCP, Kubernetes, etc.) through auto-generated node classes. The library includes a CLI tool to execute diagram scripts and a web-based playground (React/TypeScript) that runs the library in-browser via Pyodide, allowing interactive editing and export. The architecture is a library with a CLI entry point, plus a separate SPA playground. Key entry points are the `diagrams` CLI command and the `Diagram`/`Node` classes. External dependencies include Graphviz (system binary), Jinja2, and for the playground: Pyodide, @hpcc-js/wasm-graphviz, React, CodeMirror. The codebase is well-structured with a code generation pipeline for provider nodes, comprehensive testing, and a polished user experience.
react-py is a React library that enables running Python code directly in the browser by leveraging Pyodide, a Python distribution compiled to WebAssembly. The library provides a PythonProvider context and two hooks (usePython and usePythonConsole) for executing Python scripts and interacting with an interactive console. Python execution occurs in a dedicated web worker via comlink-based RPC, preventing UI blocking. A service worker intercepts synchronous fetch requests from the worker to implement stdin input (e.g., input() function). The library supports loading Pyodide official packages and micropip-installable packages, file system operations (read/write/mkdir/rmdir), module watching for hot-reloading, execution timeouts, lazy worker initialization, and automatic package import detection. The architecture is cleanly separated into provider, hooks, worker scripts, and types, with the documentation site (Docusaurus) serving as both documentation and interactive playground.