Hacker News Reader

Comment by jokoon | Hacker News Reader

I tried brython once and wrotesome video/image gallery with it, I was quite happy, but it ended up being quite slow.

I'm super excited about pyodide, although:

* I can't find a discord or IRC channel to ask questions, I guess the project is still young. Last time I've seen this project, it looked like a scientific software suite, which came with a lot of stuff I don't need.

* I wish there was more examples or samples, especially with events and the DOM.

* I've glanced at the doc and howtos, and it seems it requires a server, which I don't understand. Brython seems much more straightforward.

* I've read that memory leaks can happen in multiple places

* This example seems like misleading advertisement, in my view, at least for now:

    from js import document
    x = document.getElementById("myElement")

(Or I might need to read up more doc to understand how to get to that point)

View on HN

A chat channel is mentioned in the readme: https://gitter.im/pyodide/community

Yes, we are working on adding more examples.

Well you need to be able to serve static files. So if you are building locally you need to start a webserver, otherwise you can use the JsDelivr CDN.

Memory leaks can happen if you translate objects between Python and JS. So of it is unavoidable because it's difficult to know when to destroy Python objects from JS vice versa, but lots of work on it has been done in the 0.17 release with more to come in 0.18

Why do you find the example misleading?

> Well you need to be able to serve static files. So if you are building locally you need to start a webserver, otherwise you can use the JsDelivr CDN.

I don't understand, can't I just use offline, static files ?

I would still expect to use my own webserver, unrelated to pyodine, like flask or whatever.

> Yes, we are working on adding more examples.

Glad to hear this :) !

> Why do you find the example misleading?

I haven't really seen that example in the doc or elsewhere, and I don't understand the steps required to make such example work offline or without a webserver.

EDIT:

Another cool thing of brython is that could "inline" a python script inside a html file, such as:

    <script type="script/python">

    <script src="thing.py"></script>

If you just open an HTML file in your browser via its local path (e.g. /home/user/...) the browser will prevent you from loading other files by JS due to CORS. So we need a web-server to set the appropriate CORS headers. Any web-server would do.

For inline code, yes it would be doable someone would need to continue https://github.com/pyodide/pyodide/pull/692

For examples, I'll respond in the Pyodide issue where you commented.

Any other way to agree with CORS without a webserver? What about embedding some js code, or moving the WASM files locally?

Thanks for the answers.

Cheers and good luck for this project, I can't wait for it to progress!

You can work around it by embedding data into HTML files but it's really not recommended https://github.com/pyodide/pyodide/pull/606

no server is required. check https://pyodide.org/en/stable/usage/quickstart.html

They have different goals, nobody expect people to write a website ui with pyodine.

(although, python is my fav lang, and I wouldnt use brython either, 700ko to pay upfront before writing any code is too much)

Reply on news.ycombinator.com