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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!

Transformer Can Hold Two Thoughts at Once: Evidence of Linear

https://arxiv.org/abs/2609.29845
1•sbulaev•35s ago•0 comments

Nexflix: Workload Attestation on Managed Compute

https://netflixtechblog.com/trading-a-cloud-identity-for-your-own-workload-attestation-on-managed...
1•meredithbloom•1m ago•0 comments

Legendary US spy plane vanishes from CA base amid mystery over new NASA aircraft

https://economictimes.indiatimes.com/news/international/global-trends/legendary-us-spy-plane-vani...
1•gscott•3m ago•0 comments

Comprehension Layer

https://www.fujimon.com/blog/comprehension-layer
1•yuyafujimoto•7m ago•0 comments

Alaska's Orange Rivers More Metallic Than Acid Mine Drainage

https://www.ucdavis.edu/climate/news/alaskas-orange-rivers-more-metallic-acid-mine-drainage
1•littlexsparkee•8m ago•0 comments

Fireside Friday, September 25, 2026

https://acoup.blog/2026/09/25/fireside-friday-september-25-2026/
1•Tomte•16m ago•0 comments

Show HN: Puzzle – a sliding puzzle on the hyperbolic plane

https://mametter.itch.io/12-puzzle
1•mametter•16m ago•1 comments

Show HN: I built a chatbot that can only reply in emoji, powered by Jev

https://jev.chat
1•skewcy•20m ago•0 comments

Turn your public repos into artworks

https://www.habibicode.org/artrepo
1•nicocarsui•21m ago•0 comments

Show HN: Botbin.io – pastebin for AI agent artifacts

https://botbin.io/?md=true
1•obilgic•25m ago•0 comments

Porting Factorio to ARM and SteamFrame

https://www.factorio.com/blog/post/fff-446
1•kristianp•25m ago•0 comments

I Could've Accessed 17T Microsoft Records

https://blog.faav.net/how-i-couldve-accessed-17-trillion-microsoft-records
1•elorant•28m ago•0 comments

Can AI Shopping Agents Be Trusted?

https://www.f-secure.com/en/partners/insights/can-ai-shopping-agents-be-trusted-we-built-one-to-f...
2•ddaniel10•30m ago•0 comments

DraftKings Is Using AI to Supercharge the Harms of Online Behavioral Advertising

https://www.eff.org/deeplinks/2026/09/draftkings-using-ai-supercharge-harms-online-behavioral-adv...
1•dotcoma•35m ago•0 comments

Snile

https://big.com/
1•andytratt•39m ago•0 comments

The Cartesian Hand: In-Hand Manipulation with All-Linear Fingers

https://generalroboticslab.com/cartesian_handv1
1•AareyBaba•40m ago•0 comments

OpenAI pauses RL due to model escaping sandbox

https://twitter.com/tomekkorbak/status/2103673419888013649
3•jumploops•44m ago•1 comments

Show HN: Gutcheck, grep for meaning with a local CPU model

https://github.com/sfmqrb/gutcheck
1•sfmqrb•46m ago•0 comments

Category Theory Explained for Haskell Programmers [video]

https://www.youtube.com/watch?v=Xr1gcdb_IvA
1•frenchie_sans•46m ago•0 comments

An LLM Beat NetHack

https://kenforthewin.github.io/blog/posts/llm-nethack-ascension/
1•EvgeniyZh•48m ago•0 comments

Stanford student was erased after university photo change sparks AI controversy

https://www.cleveland.com/news/2026/09/stanford-student-says-he-was-erased-after-university-photo...
2•grugagag•49m ago•0 comments

Scale of Conductor Usage at Netflix

https://netflixtechblog.medium.com/netflix-conductor-the-next-chapter-41ad21067649
2•nfkuler•54m ago•0 comments

OpenAI works to understand scope of agent activity as user data leak emerges

https://www.reuters.com/world/openai-works-understand-full-scope-agent-activity-user-data-leak-em...
3•grugagag•56m ago•0 comments

Show HN: Jevcut – an auto-clipper where code picks the cut points, not the model

https://github.com/VBS2004/jevcut
1•VBS2004•56m ago•0 comments

Show HN: ZenMode OS, Open-source launcher: stay under your limit, save in gold

https://zenmodeos.com/story/index.html
2•kr07_work•1h ago•0 comments

Show HN: I built my parents a credit card chooser with Jev

https://points.chengeric.com/
1•eh8•1h ago•0 comments

Was this award-winning book written by AI?

https://www.cbc.ca/news/canada/montreal/thelyson-orelien-ai-scandal-9.7355167
3•olalonde•1h ago•1 comments

BookmarkFS – mount browser bookmarks as a FUSE filesystem

https://www.nongnu.org/bookmarkfs/
3•Curiositry•1h ago•0 comments

RFC 9449 – OAuth 2.0 Demonstrating Proof of Possession (DPoP)

https://www.rfc-editor.org/info/rfc9449/
1•locknitpicker•1h ago•0 comments

Getting Deeper into Local Inference

https://octet-stream.net/b/scb/2026-09-26-getting-deeper-into-local-inference.html
2•thombles•1h ago•0 comments