empythoned

It's really awesome to see how far this has come. I believe we at Repl.it were the first to try something like this in production. We emscriptined CPython to JavaScript and contributed quite a bit to the project in the process (including the initial virtual filesystem implementation). https://github.com/replit-archive/empythoned I deployed this at scale at Codecademy were millions of users were using it to learn Python but hit a lot of problems with it. For one, if you're in a 3rd world country then the bundle size is a non-starter (this is potentially solved with WASM being a binary format). Even if you managed to download the bundle lots of old computers would run out of memory trying to parse the JS (again probably solved by the binary AST format of WASM). Because of this and a few other issues (the dev experience of emscripten was rea

> For example: I don't understand why Python, JavaScript, Java, Ruby, and so on have not delivered tools that ease the path for those who wish to write applications designed to run code from untrusted sources. I think this would make the web a lot more competitive and overall healthier as an independent institution. You would have to ask the Python, Ruby etc. people why they don't work on it more, but from the side of the web, there is plenty of effort. First, several languages like those have been ported to the web, by porting their VMs: http://kripken.github.io/lua.vm.js/lua.vm.js.html http://ruby.dj/ https://github.com/replit/empythoned Instead of each language needing to devise a sandboxing mechanism, by porting them to the web, they can be run safely there. This is also much safer for the web: just one sandbox, instead of many. WebAs

Related project: https://github.com/replit/empythoned It's a pity it didn't get more traction. The effort invested seems a bit more worthwhile.

Other languages compilers/interpreters may be compiled in asm.js and let us program in something different than Javascript (e.g. https://github.com/replit/empythoned ). Is this realistic?

repl.it uses a version of CPython compiled with emscripten[1], so the version in the article should be similar in size. 1: https://github.com/replit/empythoned

One not mentioned in that list is Empythoned, which is the actual CPython engine compiled to JS using Emscripten. Repo: https://github.com/replit/empythoned Live demo: http://repl.it/languages/Python

I tried llvm based project https://github.com/kracekumar/test-empythoned(empythoned: https://github.com/replit/empythoned). There are few limitation I am facing, `import` system don't work(compilation issue). From my experience more effort is required.

Ruby (https://github.com/replit/emscripted-ruby) and python (https://github.com/replit/empythoned) are built using emscripten (https://github.com/kripken/emscripten/wiki) I would imagine that other languages like C could be brought in if they could be compiled using emscripten. However, people have had problems bringing clang and llvm into emscripten: https://github.com/kripken/emscripten/issues/579

This looks really nice! It seems like the other side of the Python-in-the-browser coin to Empythoned (https://github.com/replit/empythoned) used by repl.it (http://repl.it/). (Ignore this...)The mime-type is wrong though, there isn't an authoritative mime-type for Python, so it should use a private subtype like text/x-python or application/x-python.

They also use Empythoned (CPython compiled with Emscripten, https://github.com/replit/empythoned) and Emscripted-Ruby (Ruby compiled with Emscripten, https://github.com/replit/emscripted-ruby) and a version of Lua compiled with Emscripted (https://github.com/replit/jsrepl/tree/master/extern/lua), among others.