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Show HN: Reaktiv – I built Excel-like reactive programming for Python

https://bui.app/when-frontend-reactivity-meets-backend-python-the-story-of-my-first-1-000-download-library/
2•buibuibui•1y ago
Hi HN! I created Reaktiv, a Python library bringing reactive programming to the backend world that recently hit 1,000+ monthly downloads.

I'm actively promoting it because I believe signal-based reactivity (a concept that spread rapidly in frontend development) has huge untapped potential in Python. My breakthrough came when I stopped describing it as "Angular signals for Python" and started calling it "Excel-like computation graphs" - suddenly Python developers understood the value.

The library automatically tracks dependencies between computations, only recalculating values when dependencies change. This eliminates manual dependency tracking, prevents synchronization bugs, and reduces cognitive load when managing complex state.

Interestingly, I've noticed some initial interest from data scientists, though I'm still exploring what specific problems it might solve for them. I also believe the Home Assistant/IoT communities could benefit greatly from this approach.

Would love your thoughts on bringing frontend patterns to backend development!

The curious case of Nebius, publicly traded AI infrastructure 'startup' (2024)

https://techcrunch.com/2024/11/24/the-curious-case-of-nebius-the-publicly-traded-ai-infrastructur...
1•pretext•2m ago•0 comments

Making the case for context-aware AI

https://www.technologyreview.com/2026/10/22/1146812/making-the-case-for-context-aware-ai/
1•joozio•2m ago•0 comments

Daylight Saving Time

https://en.wikipedia.org/wiki/Daylight_saving_time
1•pretext•3m ago•0 comments

Domain for sale suitable for link in bio service

https://qet.bio
1•ahmedels•9m ago•1 comments

England, but Dutch

https://i0.wp.com/taaldacht.nl/wp-content/uploads/2023/08/engeland.png?ssl=1
1•anieuwland•12m ago•1 comments

Against Mathematics

https://doomslide.substack.com/p/against-mathematics
1•Michelangelo11•17m ago•0 comments

Failed Techno-Utopias (2022)

https://redstarcaucus.org/failed-techno-utopias/
1•jalev•20m ago•0 comments

Joining the 2026 Asian Apiculture Association Conference

https://boussejra.com/2026/10/24/asian-apiculture-association-conference.html
1•malikolivier•27m ago•0 comments

How Bad Is AI History Content? [video]

https://www.youtube.com/watch?v=iIm3f1qTvp8
1•daverol•31m ago•1 comments

Why Are Chinese Trains So Fast, Clean, and Cheap? [video]

https://www.youtube.com/watch?v=PtJC9r7-1jw
2•xbmcuser•32m ago•0 comments

Mess with DNS

https://messwithdns.net/
1•gurjeet•36m ago•0 comments

Reflections on Trusting Lean

https://arxiv.org/abs/2610.30433
1•bananaflag•41m ago•0 comments

Vectors ATC

https://vectorsatc.com/
1•marklit•54m ago•0 comments

Games can now be merged with AI

https://melty.gg
1•ckx•1h ago•0 comments

Termlet – Modern cross-platform SSH terminal and SFTP client

https://github.com/Amanbig/termlet/releases
1•procoder588•1h ago•0 comments

I nearly chose the wrong career

https://coached.com/essays/i-nearly-chose-the-wrong-career/
1•rohanm93•1h ago•0 comments

AI Detection Is Set to Transform Live Streaming

https://www.red5.net/blog/ai-detection-is-set-to-transform-live-streaming/
1•mondainx•1h ago•0 comments

Making Student Learning Visible in Math Class

https://www.edutopia.org/article/accurately-assessing-students-math-learning/
1•theanonymousone•1h ago•0 comments

New Open-Source Cybersecurity Platform Uses AI Agents to Hunt Threats

https://medium.com/@ai_news/argus-might-be-one-of-the-most-impressive-open-source-cybersecurity-p...
17•is_dev_active•1h ago•6 comments

When sandboxed agents talk through the CPU cache

https://gctl.io/blog/2026/when-sandboxed-agents-talk-through-the-cpu-cache/
1•frostbyte7•1h ago•0 comments

GMRT Update Free for Commercial Use and Source Access

https://gamemaker.io/en/blog/gmrt-update
1•ferryth•1h ago•0 comments

The Temporary Pleasure of Conversation

https://www.theatlantic.com/newsletters/2026/10/the-secret-to-a-good-conversation/689141/
2•theanonymousone•1h ago•0 comments

Show HN: Hindsight – Lightweight, elegant, open-source tracker for Windows/macOS

https://github.com/Tomotsugu-dev/Hindsight
2•Tomotsugu-dev•1h ago•0 comments

Scientists rediscover how to make ancient Roman colour-changing glass

https://www.theguardian.com/science/2026/oct/25/scientists-rediscover-ancient-roman-colour-changi...
3•n1b0m•1h ago•0 comments

No Effect Before Its Cause: From Einstein to Lamport

https://www.itworkslocally.dev/posts/no-effect-before-its-cause
1•theanonymousone•1h ago•0 comments

Not Palantir

https://notpalantir.eu/
2•polyamid23•1h ago•0 comments

Prompt Injection Techniques Every Red Teamer Should Test

https://fdzdev.medium.com/20-prompt-injection-techniques-every-red-teamer-should-test-b22359bfd57d
2•auraham•1h ago•0 comments

Universal Declaration of Human Rights (1948) [pdf]

https://www.un.org/sites/un2.un.org/files/2021/03/udhr.pdf
3•gone35•1h ago•1 comments

TaskWire An MCP-based taskboard for managing AI agent workflows

https://taskwire.si
1•aeroo•1h ago•1 comments

There is no official XScreenSaver GitHub repository

https://github.com/cowmix/xscreensaver
1•AndrewDucker•1h ago•0 comments