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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•8mo 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!

SHDL – A Minimal Hardware Description Language Built from Logic Gates

1•rafa_rrayes•2m ago•0 comments

I cut Claude API costs from $70/month to pennies

1•ok_orco•3m ago•0 comments

LLMs vs. Geolocation: GPT-5 Performs Worse Than Other AI Models (2025)

https://www.bellingcat.com/resources/2025/08/14/llms-vs-geolocation-gpt-5-performs-worse-than-oth...
1•mooreds•3m ago•0 comments

Parsing Counter-Strike 2 demo files in .NET

https://counterstrike.blog/blog/guides/extract-demo-files-csharp/
1•sieep•3m ago•0 comments

Field of clones: How horse replicas came to dominate polo

https://knowablemagazine.org/content/article/technology/2026/cloned-polo-horses
1•wjb3•4m ago•0 comments

Clawdbot - open source personal AI assistant

https://github.com/clawdbot/clawdbot
2•KuzeyAbi•9m ago•0 comments

Does Pentagon Pizza Theory Work?

https://www.lesswrong.com/posts/Li3Aw7sDLXTCcQHZM/does-pentagon-pizza-theory-work
1•nreece•14m ago•0 comments

Insect Pollination Before Angiosperms and Lessons for Modern Ecosystems

https://www.mdpi.com/2075-4450/17/1/103
1•PaulHoule•17m ago•0 comments

PyTorch to CoreML converter that generates production Swift/Kotlin code

https://refactor-ai-website.vercel.app/#
1•AbdoulayeSeydi•17m ago•0 comments

The Engineer who invented the Mars Rover Suspension [video]

https://www.youtube.com/watch?v=QKSPk_0N4Jc
1•skrubis•17m ago•0 comments

Zip Game Unlimited

https://zipgameonline.com
1•jgsteven•17m ago•0 comments

/Sanctuary – A Terminal Elegy

https://a-life.vercel.app/
1•mattcbaker•18m ago•0 comments

Conservatism Consists of One Proposition

https://crookedtimber.org/2018/03/21/liberals-against-progressives/
1•ravenical•18m ago•0 comments

AI Took Control of My Life and I Love It

https://www.thefp.com/p/ai-took-control-of-my-life-and-i
1•mhb•20m ago•0 comments

If You Want Different Outcomes, You Have to Do Different Things

https://freddiedeboer.substack.com/p/if-you-want-different-outcomes-you
1•c0nsumer•23m ago•0 comments

The Engineering Behind Clawdbot

https://vindler.solutions/blog/clawdbot-technical-deep-dive
1•cdutra•24m ago•0 comments

The clever way food trucks are now using e-bike batteries

https://electrek.co/2026/01/25/the-clever-way-food-trucks-are-now-using-e-bike-batteries/
3•jerlam•26m ago•0 comments

Scientists Identify Brain Waves That Define the Limits of 'You'

https://www.sciencealert.com/scientists-identify-brain-waves-that-define-the-limits-of-you
2•mikhael•26m ago•0 comments

GNU Guix 1.5.0 Released

https://guix.gnu.org/blog/2026/gnu-guix-1.5.0-released/
1•_emacsomancer_•28m ago•0 comments

Show HN: Beach Report – Real-time beach conditions, weather, and surf reports

https://beach.report
1•theantonym•29m ago•0 comments

Halley's Comet wrongly named: 11th-century English monk predates British astrono

https://phys.org/news/2026-01-halley-comet-wrongly-11th-century.html
5•bookmtn•30m ago•1 comments

Tell HN: I Have Won HN

10•neilv•32m ago•6 comments

Cool Discussion on Signs

https://old.reddit.com/r/OpenChristian/comments/13ogqcn/signs_from_god_does_anyone_feel_this_actu...
1•marysminefnuf•38m ago•2 comments

MIT-Human License Proposal

https://github.com/tautvilas/MIT-Human/blob/main/LICENSE
2•brisky•39m ago•3 comments

Trade an alliance for an island? That's a bad deal

https://www.cnn.com/2026/01/25/politics/greenland-nato-ancient-greece-expert-analysis
2•breve•40m ago•0 comments

De-Vibing a Codebase

https://dumbideas.xyz/posts/de-vibing-a-codebase/
2•omegastick•41m ago•0 comments

Google's Gist: Greedy Independent Set Thresholding for Retrieval Explained

https://websiteaiscore.com/blog/gist-vector-exclusion-zones
2•aggeeinn•42m ago•1 comments

Show HN: GroqBash – Single‑File Bash Client for Groq API

https://github.com/kamaludu/groqbash
1•kamaludu•44m ago•0 comments

"We're aware of the DMCA takedown notice of julialang logo by an OF creator"

https://twitter.com/KenoFischer/status/2014327875277602983
6•sundarurfriend•44m ago•0 comments

Home solar in rural America: how much battery do you need in a winter storm?

https://electrek.co/2026/01/24/home-solar-in-rural-america-how-much-battery-do-you-need-in-a-wint...
1•Bender•45m ago•1 comments