Async / Await

[psytron]

How to enable async await?

PromiseLib = js2py.require('my-feed-js')
x  = await PromiseLib.fetchData() 

[MagMueller]

please, that would be so helpful!

Is there any possibility to run async function? I am getting a syntax error

[worstperson]

This depends on ES6 Promise support before it can be added: https://github.com/PiotrDabkowski/Js2Py/issues/273

The await keyword looks like it's blocking, so we'd probably need to implement threading for it to work.

[MagMueller]

This depends on ES6 Promise support before it can be added: #273

The await keyword looks like it's blocking, so we'd probably need to implement threading for it to work.

Can We help you somehow with it, to make that happen?

[worstperson]

I suppose by becoming so motivated to get your code running that you pull up the specifications and produce patches to try and implement those features. Threading in particular is a huge open question for me. I have so far put off any effort in researching it personally.

I have looked into adding Promise support, but none of the code I want to run uses it. Makes investing time into it a tough sell, especially given that it's more or less out-of-scope for an ecmascript 5.1 interpreter.

[milahu]

example: sleep should be translated to asyncio.sleep

function sleep(ms) {
  return new Promise(resolve => setTimeout(resolve, ms));
}

async function main() {
  await sleep(100);
}

main();

import asyncio

async def main():
    await asyncio.sleep(0.1)

asyncio.run(main())

chatGPT response

import asyncio

async def sleep(seconds):
    await asyncio.sleep(seconds / 1000)

async def main():
    await sleep(100)

asyncio.run(main())