dukpy

The project has been around for a while, but I never shared it here, so I thought it was fine to bring it up in case anyone was looking for something similar. DukPy is a Javascript interpreter for Python that is primarily designed with ease of use and ease of install use cases. Most other Js interpreters might be faster or more feature complete, but are also harder to install. DukPy tries to avoid any external dependency so that compiling it is straightforward and provides prebuilt wheels for a lot of different system. The project is designed with Web development in mind, so it also includes some convenient transpilers adapted to DukPy, so that you can transpile your JSXX or SCSS content without having to install nodejs at all. In the future I hope to grow the NodeJS compatibility layer and switch the javascript engine at a certain point.

Fwiw there are python bindings for QuickJS and Duktape: https://github.com/PetterS/quickjs https://github.com/stefano/pyduktape https://github.com/amol-/dukpy I can't speak to the quality of those bindings, but they do seem maintained.

I was interested to see that this uses the DukPy wrapper around Duktape for the JavaScript interpreter: https://browser.engineering/scripts.html This made me start digging into whether this was considered a "safe" way of executing untrusted JavaScript in a sandbox. It's not completely clear to me if DukPy currently attempts safe evaluation - it's missing options for setting time or memory limits on executed code for example: https://github.com/amol-/dukpy There's a QuickJS Python wrapper here which offers those limits: https://github.com/PetterS/quickjs I'm pretty paranoid though any time it comes to security and dependencies written in C, so I'd love to see a Python wrapper around a JavaScript engine that has safe sandbox execution as a key goal plus an extensive track record to back it up!

Javascripthon supports converting either a python source file or a python function object directly, but actually using the embedded js interpreter to do the transpilation takes some time due to BabelJS code bootstrap time. Having a "HOT" interpreter with an execution context that is persistent and can be used to convert code to ES5 on the fly has been already implemented by duckpy creator and i plan to intergate it very soon. See https://github.com/amol-/dukpy/issues/4