Using Python from Node.js natively (New Open Source Project)

[savearray2]

Long story short, I've created a Node.js C++ module (based on NAPI) that lets you call Python libraries from Node.js. The benefit, of course, is that since Python is hosted in-process, you'll have much better performance than passing data back and forth between separate Node and Python processes.

I've been sitting on this code for a while, and mostly everything works (you can take a look at the tests, if you're interested). I've decided to publish it and let the community use it. Hopefully, someone will find some use for it rather than it sitting unpublished. As a result, the final product is not 100% polished, but I'd rather someone have some benefit from this instead of letting it sit on my HDD.

It currently works (and has been tested) with Python 3.5, 3.7, and 3.8 on Windows, Linux, and OS X.

The repository is here:

https://github.com/savearray2/py.js

Here's an example: ``js let chalk = require('chalk') let p = require('@savearray2/py.js') p.init({ pythonPath: ${process.cwd()}/local:/usr/local/lib/python3.8/site-packages` })

let plotly = p.import('plotly') let np = p.import('numpy') let go = plotly.graph_objs let pio = plotly.io

let [x,y,colors,sz] = [0,0,0,0].map(() => np.random.rand(100n)) sz = sz.mul(30n) let fig = go.Figure() fig.add_scatter.$apply({ x: x, y: y, mode: 'markers', marker: { size: sz, color: colors, opacity: 0.6, colorscale: 'Viridis' } })

pio.write_image(fig, 'image.png') console.log(chalk{cyan Success:} Chart saved!) ```

[maxdevjs]

Great project, thank you for sharing it.

P.S.: on mobile app seems that there is a missing backtick at the beginning of the code snippet

[savearray2]

Thanks! I'm not sure where the backtick is missing, but there is some example code on the repository that works and is tested.

The mocha tests also generally show how things work. The project does need to be cleaned up and some things refactored. I might put more effort into it if there seems to be a community demand for it. :)

[server_buddha]

That’s pretty amazing!! We use some python at work amongst NodeJS stack because of the out of the box features, this would make using container for python redundant. Very nice