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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!

Generate filtered RSS feeds based on your own filter criteria

https://codeberg.org/ifin/rss-filter
1•speckx•1m ago•0 comments

The eerie interface of man and machine (Life Magazine, October 1967)

https://blog.jgc.org/2026/06/the-eerie-interface-of-man-and-machine.html
1•Brajeshwar•2m ago•0 comments

SK Hynix targets $29B US listing as AI demand surges

https://www.reuters.com/world/asia-pacific/south-koreas-sk-hynix-says-raise-29-bln-us-adr-listing...
1•JumpCrisscross•2m ago•0 comments

OpenArt Director: Claude Code for video production – vibe direct your videos

https://openart.ai/director
1•cocokechun•2m ago•1 comments

2.7 Fexpr vs. Vtable

https://github.com/naver/lispe/wiki/2.7-FEXPR-vs.-vtable
1•mpweiher•2m ago•0 comments

We trained a real-time world model for $2k with Minecraft mod revenue

1•dnlayux•4m ago•0 comments

Network shares: still talking about them in 2026

https://pointieststick.com/2026/06/22/network-shares-still-talking-about-them-in-2026/
1•mmphosis•4m ago•0 comments

AI vs. AI Playing Chess

https://ai-play-chess.pages.dev/
1•riasatsk•4m ago•0 comments

America's data-centre backlash puts the AI boom at risk

https://www.economist.com/business/2026/06/23/americas-data-centre-backlash-puts-the-ai-boom-at-risk
2•bookofjoe•5m ago•1 comments

Markdown Doesn't Compel Enforcement

https://webmnem.here.now/markdown-doesnt-compel-generation/
1•InfraStack•5m ago•0 comments

Levels of Email Authentication Maturity

https://dmarcdefender.io/docs/dmarc-maturity
2•c0nrad•6m ago•0 comments

Vibe engineered WebGPU backend for SDL_GPU with demo

https://github.com/libsdl-org/SDL/issues/10768
2•roflcopter69•6m ago•1 comments

Will Anyone Buy This Cheap EV Truck with Hand-Crank Windows and No Radio?

https://www.wsj.com/business/autos/will-anyone-buy-this-cheap-ev-truck-with-hand-crank-windows-an...
2•JumpCrisscross•7m ago•1 comments

DARPA X-Plane Designed to Maneuver with Just Bursts of Air Gets Its Wings

https://www.twz.com/air/darpa-x-plane-designed-to-maneuver-with-just-bursts-of-air-finally-gets-i...
1•bilsbie•8m ago•0 comments

Intel is giving budget gamers what Nvidia and AMD won't

https://www.pcworld.com/article/3149833/intel-is-giving-budget-gamers-what-nvidia-and-amd-wont.html
1•dingi•9m ago•0 comments

Germany rail network briefly halted nationwide due to IT malfunction

https://www.bbc.com/news/articles/crm0ek4z7ggo
1•m_fayer•10m ago•1 comments

President Abruptly Cancels Signing Ceremony for Bipartisan Housing Bill

https://www.wsj.com/politics/policy/trump-abruptly-cancels-signing-ceremony-for-bipartisan-housin...
3•JumpCrisscross•12m ago•1 comments

Now you can send tokens instead of money

1•david3289•12m ago•0 comments

The Difference Between a Line and a Curve

https://alexoppenheimer.substack.com/p/the-difference-between-a-line-and
1•crescit_eundo•13m ago•1 comments

Twenty Glorious Years of Dedoimedo

https://www.dedoimedo.com/life/dedoimedo-20-years.html
1•dxs•14m ago•0 comments

Registration

https://www.winnipegsd.ca/student-registration
3•bhn•15m ago•1 comments

Edsger Dijkstra's Library (Housed and Archived in Leuven, Belgium)

https://www.dijkstrascry.com/inventory
4•rramadass•16m ago•0 comments

BPL, a Compiler-Verified Protocol Language for AI-Driven Biomanufacturing

https://www.biorxiv.org/content/10.64898/2026.05.05.720956v1.abstract
3•LEVY_SN•16m ago•0 comments

Show HN: AI Manifesto

https://www.danstroot.com/posts/2026-06-23-ai-manifesto
2•dstroot•17m ago•0 comments

Windows 11 is now five years old

https://www.neowin.net/news/windows-11-is-now-five-years-old/
2•bundie•18m ago•0 comments

Show HN: Open-source AI language learning app

https://github.com/challenga-org/openlanguage
2•willks•18m ago•0 comments

RCS Templates for Any Industry

https://www.rcs-templates.com/
2•ariannacant•18m ago•0 comments

Newcomer Services

https://www.winnipegsd.ca/newcomer-services
1•bhn•18m ago•0 comments

SeatSwiper – auto-books hard-to-get Resy tables on your own account

https://www.seatswiper.com/signin
2•thedataguygeo•18m ago•0 comments

Life Insurers Aren't Just Investors in Private Credit. They're Major Lenders

https://www.wsj.com/finance/investing/life-insurers-arent-just-investors-in-private-credit-theyre...
3•jgalt212•18m ago•0 comments