Skulpt vs Transcrypt

Skulpt is a free, web-based implementation of Python that executes code entirely in the browser. It requires no preprocessing, plugins, or server-side support. The online editor provides indentation, standard editing shortcuts, and keyboard commands to run all code or only a selection. Developers can embed Skulpt in a webpage or HTML project by loading `skulpt.js` or `skulpt-min.js` together with `skulpt-stdlib.js`, and they can create and host custom modules. The usage guide also describes embedding Trinket examples in an iframe, remixing them, and saving work to a free Trinket account. Skulpt is presented for learning and teaching Python, with a project gallery for educational examples. Its master branch uses Python 3.7.3 grammar, while Python 2 remains available for projects needing it. Documentation says language coverage is incomplete, with some features missing or partial. The runtime may use MIT or PSFLv2 licensing. CLI and API access are listed.

Transcrypt compiles Python source code into JavaScript for browser applications. It converts a substantial subset of Python into JavaScript 6, with optional minification, and supports features including multiple inheritance, async/await, comprehensions, and modules. Developers can call JavaScript functions from Python and use browser DOM functions and JavaScript libraries. The distribution includes optional static type validation and consistency checks, plus multilevel source maps for tracing generated JavaScript back to the original Python. Transcrypt can also compile Python server code for Node.js and use Node libraries with require(). The project recommends installing it as a Python package with pip and documents testing on Windows, Linux, and OSX. Its focus is browser development and JavaScript libraries rather than desktop Python libraries. Because code is precompiled, Python exec and eval are unsupported, although JavaScript eval is supported. C and C++ libraries are not directly supported for browser use without special measures such as compiling them to asm.js. Transcrypt is free and open source under Apache 2.0.