Show HN: Online Python Compiler with Libraries

Re:Show HN: Online Python Compiler with Libraries by metadat on Friday March 14, 2025 @11:55PM (#43369850)

  import requests 
  
  r = requests.get('https://theonion.com')
  
  print(r.text)

Hmm, I wonder if you could use subprocess to fetch and run any binary. What kind of sandbox is this running in, and what are the limits?

Running arbitrary untrusted code seems like a potential security issue.

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Re:Show HN: Online Python Compiler with Libraries by porridgeraisin on Saturday March 15, 2025 @12:51AM (#43370076)

It runs on pyodide, i.e, a wasm interpreter that runs entirely in your browser.

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Re:Show HN: Online Python Compiler with Libraries by andycloke on Saturday March 15, 2025 @03:57AM (#43370847)

Maker here! Runs in an isolated Web Worker using Web Assembly, via Pyodide. Everything runs locally in your browser - no file system or other access. Scheduled run (paid plan) run on AWS lambda.

So, yes, sadly, network requests only work with domains with Access-Control-Allow-Origin: *. I'm looking at adding a backend CORS proxy to fix this.

We also have a Chrome extension with no CORS limitation. The extension lets you right-click Python code snippets on basically any site (Claude, ChatGPT, Deepseek etc.) to run it instantly.

https://chromewebstore.google.com/detail/python-code-runner/...

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Re:Show HN: Online Python Compiler with Libraries by metadat on Saturday March 15, 2025 @11:58AM (#43373337)

You might check out https://e2b.dev, they already have a really robust sandbox system with nice SDKs.

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Re:Show HN: Online Python Compiler with Libraries by andycloke on Sunday March 16, 2025 @05:44AM (#43377850)

Interesting, thanks

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Re:Show HN: Online Python Compiler with Libraries by hoodchatham on Saturday March 15, 2025 @05:01AM (#43371140)

Yes, it has all the normal CORS restrictions. If you're curious, the PR that added support for this is here: https://github.com/urllib3/urllib3/pull/3195

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