Show HN: Nice-looking Python bindings to V8

https://github.com/tbodt/v8py

by tbodt • 9 years ago

166 37 9 years ago

github.com

startupdiscuss• 9 years ago

I might be missing something, but can you show an example of calling the API from javascript?

You seem to be writing it in python and then calling it from within python in the example.

tbodt5• 9 years ago

context.eval runs JavaScript, which in the example is calling the Python API. expose adds an object into the global JavaScript space.

d33• 9 years ago

Nice! I hadn't tested it yet, but I remember trying to run V8 in Python and it was a real mess - I think that even building it was problematic. I might use this project one day. Did you compare your bindings to alternatives?

tbodt5• 9 years ago

No, because there really aren't any alternatives... There is PyV8, which last I checked does not compile on recent versions of V8

unusximmortalis2• 9 years ago

If I get it correctly this is V8Py meaning it allows javascript (V8) to call Python scripts, not the other way around.

"Write Python APIs, then call them from JavaScript using the V8 engine"

Twirrim• 9 years ago

That's what I took that phrase to mean, but if you look at the example in the read me, it appears to be the other way around. Writing python, defining a method, then wrapping that method in a V8 context and running it from within python.

jdc05892• 9 years ago

there are a LOT of Sublime Text plugins that depend on this.

EDIT: nevermind. i'm dyslexic

tbodt5• 9 years ago

are you thinking of pyv8?

jdc05892• 9 years ago

damn, yep. good call.

gkya2• 9 years ago

Can anybody tell what's going on with the v8py/kappa.{cpp,h} files?

RandomInteger4• 9 years ago

"// Meme header file. Every project should have one of these. Kappa Kappa Kappa"

jszymborski• 9 years ago

I'm a fan of humour in comments, easter-eggs, etc... but for no good reason, this bothers me.

andersriutta2• 9 years ago

This allows for calling synchronous JS functions from Python but not async JS functions, right? PyExecJS [0] also doesn't work with async JS, but Js2Py [1] might.

[0] https://github.com/doloopwhile/PyExecJS/issues/20 [1] https://github.com/PiotrDabkowski/Js2Py/blob/05e77f0d4ffe91e...

unusximmortalis2• 9 years ago

"Write Python APIs, then call them from JavaScript using the V8 engine"

andersriutta2• 9 years ago

The author says it works both ways [0] (e.g., this test [1]), but I don't see a test with Python calling async JS.

[0] https://news.ycombinator.com/item?id=14596163 [1] https://github.com/tbodt/v8py/blob/3c727584df684540ce30f2572...

elmigranto• 9 years ago

Wouldn't it be more performant and less awkward to compile python to JS? Or is it for importing JS code into your python program? Well, why don't compile JS to Python then?

marmaduke• 9 years ago

If JS code expects to be JITed then transpiled in Python would be quite slow. Transpiling Python to JS is difficult and loses access to various ecosystems e.g. scientific Python.

Having the two runtimes coupled seems to be the ideal way to run both languages in the same process.

droidist2• 9 years ago

Interesting. Could this be used to use SciPy stuff from JavaScript?

binora• 9 years ago

Silly question. Can I use this to interact with a machine learning model written in python from javascript on react native ? It'd be great if someone could point out the feasibility/limitations

tbodt5• 9 years ago

No, it's for running javascript from a python program and allowing that javascript to call python code.

Show HN: Nice-looking Python bindings to V8

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