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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!

Tunisia swelters as power cuts disrupt water supplies

https://www.aljazeera.com/news/2026/8/31/tunisia-swelters-as-power-cuts-disrupt-water-supplies
1•littlexsparkee•1m ago•0 comments

Marin 535B-A23B

https://openathena.ai/blog/marin-535b-launch-note/
1•tosh•4m ago•0 comments

Hackers Had a Live Feed of Every ID Verification Company Scanned for over a Year

http://www.techdirt.com/2026/09/03/hackers-had-a-live-feed-of-every-id-this-verification-company-...
2•beardyw•5m ago•0 comments

Minds – Paul S. Rosenbloom, 2026

https://mitpress.mit.edu/9780262053259/on-minds/
1•__patchbit__•7m ago•0 comments

Show HN: VM-1, a Raspberry Pi 5 based videomixer and videoplayer

https://vm-1.com/
1•clockdiv•7m ago•0 comments

KupujemProdajem searches 5.6M ads at ~10 ms with Manticore Search

https://medium.com/@s_nikolaev/how-kupujemprodajem-searches-5-6-million-ads-at-10-ms-with-mantico...
1•snikolaev•7m ago•0 comments

Power-hungry data centers are expanding in Europe

https://www.politico.eu/article/power-hungry-data-centers-are-expanding-in-europe-so-is-the-resis...
1•biscuit1v9•8m ago•0 comments

Hacker News: I got hacked

https://www.google.com/
1•teeaye82•8m ago•1 comments

Show HN: Interactive map of the Japanese address system

https://japanmap.fyi
1•vkuikka•10m ago•0 comments

Nvidia's $12,930,300,000 acquisition of Hugging Face contains an easter egg

https://twitter.com/etnshow/status/2095526554365247839
1•tosh•15m ago•0 comments

Why do developers continue to write code by hand?

https://orchidfiles.com/why-write-code-by-hand/
1•theorchid•15m ago•0 comments

Andrew Ng: The Biggest Opportunities in AI Aren't Where You Think [video]

https://www.youtube.com/watch?v=o-wv_szZ0V0
1•duck•16m ago•0 comments

Nano LM Studio

https://github.com/Kosev-Lex/NanoLM-Studio
2•presencefactor•21m ago•1 comments

Show HN: AI game builder and editor built with Rails and Godot

https://app.fusionery.com/
1•websitescenes•23m ago•0 comments

Who is accountable for Frontier AI Companies agent's criminal actions?

1•pykul•23m ago•0 comments

Limiting Overshoot – Navigating exceedance of 1.5°C and pathways towards return

https://www.unep.org/resources/limiting-overshoot-navigating-exceedance
2•bryanrasmussen•23m ago•0 comments

Signal Beta adds support registrations without a phone number

https://community.signalusers.org/t/registration-without-a-phone-number/2222?page=10
1•ErenayDev•25m ago•0 comments

Septabee, a unique, free DAW [video]

https://www.youtube.com/watch?v=lW8Z98pXuSE
2•alok-g•34m ago•1 comments

UN to vote on adopting new world map that shows Africa's true scale

https://www.theguardian.com/world/2026/sep/04/un-vote-world-map-mercator-equal-earth-africa
5•plaguna•35m ago•0 comments

Unlocking Lossless Speedups in LLMs via Discrete Diffusion (5000 Tk/S)

https://s-sahoo.com/uno/
2•E-Reverance•36m ago•0 comments

Ask HN: What happened to Amprius and their claimed 450Wh/kg battery?

https://www.google.com/search?q=amprius+battery+450
2•walrus01•39m ago•1 comments

Building the CAD application of my dreams

https://v2.brep.io/blog/building-the-cad-application-of-my-dreams
1•mmiscool•44m ago•1 comments

New study shows that psychedelic drugs affect the brain differently

https://www.sdu.dk/en/om-sdu/fakulteterne/sundhedsvidenskab/nyheder-2026/psykedeliske-stoffer-paa...
1•XzetaU8•44m ago•0 comments

OpenBB belongs to everyone (their plan to open source)

https://openbb.co/
1•ColinEberhardt•50m ago•0 comments

NeoMME: Multimodal encoders trained from scratch with a single Transformer

https://huggingface.co/blog/Hcompany/neomme
1•CoderLim110•51m ago•0 comments

OpenAI Cut Off a Billion-Dollar Customer to Avoid Elon Musk

https://www.wired.com/story/openai-elon-musk-cursor-billion-revenue/
3•doener•56m ago•1 comments

Ask HN: Why is HN native dark mode not implemented yet?

1•SriniK•57m ago•1 comments

Decoding the NEC V20 Microcode

https://martypc.blogspot.com/2026/09/decoding-nec-v20-microcode.html
2•mariuz•59m ago•0 comments

Profession has died. Now what?

https://blog.ponelat.com/p/your-profession-has-died-now-what
1•ponelat•1h ago•0 comments

Anti-Ad Download Assistant" for Free

2•jackie_001•1h ago•0 comments