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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!

Show HN: S3mail – Serverless personal email on AWS with JMAP

https://github.com/zero11-0203/s3mail
1•zero11-0203•17s ago•0 comments

Killer App, the thrilling story about the rise of Telegram

https://www.faber.co.uk/journal/faber-set-to-publish-killer-app-the-thrilling-story-about-the-ris...
1•elies•47s ago•0 comments

Geometry, Kinematics, Statics, and DYNAMICS(2018) [pdf]

http://ruina.tam.cornell.edu/Courses/ME4730%20Fall%202018/books/Dynamics_Book_Bernstein__Goel__An...
1•pillars•1m ago•0 comments

Show HN: Promptcheckup – pass/fail check for prompt changes, with 95% intervals

https://github.com/gael55x/promptcheckup
1•gael55x•19m ago•0 comments

Show HN: Did prediction markets do any predicting this midterms?

https://app.artifactbin.dev/@vivek/AQTt2H-did-prediction-markets-predict-the-midterms
1•nuwandavek•21m ago•0 comments

Vapes, pouches and now tablets: The tobacco industry's newest nicotine product

https://www.theexamination.org/articles/zyn-melts-nicotine-tablets-kids
1•paimapi•27m ago•0 comments

Lighting the Skies

https://computer.rip/2026-10-25-searchlights.html
5•dverlaeckt80•31m ago•0 comments

Show HN: Backwords – Let AI teach you how to speak in reverse

https://backwords.greg.technology/
9•gregsadetsky•32m ago•2 comments

YC Backed Bron AI Accused of Using LeBron's Name and Likeness

https://frontofficesports.com/article/lebron-james-demands-ai-betting-app-stop-using-his-likeness/
3•sicgods•37m ago•1 comments

Meta introduces Spaces: custom app views built by your Muse agent

https://about.fb.com/news/2026/11/introducing-spaces-customize-muse-app/
1•willmarch•38m ago•1 comments

Show HN: Roomzine – turn a photo of your room into a redesign magazine

https://roomzine.com/
1•ayarmots•40m ago•0 comments

Magnets and Rare Earths

https://robodienst.com/learning-paths/magnets-and-rare-earths
1•Bluestein•42m ago•0 comments

No Big Deal (TV Series)

https://en.wikipedia.org/wiki/No_Big_Deal_(TV_series)
1•kakadu•42m ago•0 comments

Robodienst

https://robodienst.com/supply-chain/unitree-g1
1•Bluestein•43m ago•1 comments

Amagi-clipper, long recordings to captioned 9:16 clips, locally

https://github.com/amagilabs/amagi-clipper
1•amagilabs•48m ago•0 comments

What happens when a fake coding test reaches a security company?

https://www.sophos.com/en-us/blog/fake-coding-test-reaches-security-company
1•ram_rattle•59m ago•0 comments

Toddler Phone Calls Family and No One Else

https://hackaday.com/2026/11/03/toddler-phone-calls-family-and-no-one-else/
3•lxm•59m ago•0 comments

My personal Navier-Stokes or How Claude rebuilt the game we wrote in high school

https://writing.pointnine.com/p/my-personal-navier-stokes-or-how
2•chrija•1h ago•1 comments

Wikimedia Foundation Spending

https://en.wikipedia.org/wiki/Wikipedia:Wikipedia_Signpost/2017-02-27/Op-ed
1•germanrabbit•1h ago•0 comments

DeepMind AI agents find two weaknesses in legacy 1024-bit RSA cryptosystems

https://twitter.com/pushmeet/status/2118752095859794390
2•dvaplima•1h ago•0 comments

Show HN: Combining Bursts of Images

https://github.com/skittleson/burst-superres
1•skittleson•1h ago•0 comments

Brave Sells Its Search Index to AI, and Your Website Is Probably in It

https://www.searchenginejournal.com/brave-sells-its-search-index-to-ai-and-your-website-is-probab...
8•linhns•1h ago•0 comments

Show HN: Krea 2 Showcase

https://puzza.pages.dev
1•tamnv•1h ago•0 comments

Amiga Emulator with PPC JIT and ReAction GUI

https://os4depot.net/?function=showfile&file=emulation/computer/euae-reactiongui.lha
1•doener•1h ago•0 comments

Historically grounded settlement simulation set in Northern Germany around 1500

https://samenland.app/
1•doener•1h ago•1 comments

Digestive Tract for Digestion, Respiration in Air-Breathing Weatherloach [pdf]

https://pmc.ncbi.nlm.nih.gov/articles/PMC11201251/
1•thunderbong•1h ago•0 comments

I Tested a Popular A.I. Slop Detector. It Felt Empowering

https://www.nytimes.com/2026/08/13/technology/personaltech/pangram-ai-detector-test.html
2•paulpauper•1h ago•0 comments

Musk reposts tweet calling Starlink service for Ukraine 'mistake'

https://kyivindependent.com/musk-reposts-tweet-calling-starlink-service-for-ukraine-mistake/
5•doener•1h ago•0 comments

Notes on San Marino

https://mattlakeman.org/2026/11/05/notes-on-san-marino/
1•paulpauper•1h ago•0 comments

A Preposterous, Overpriced, Beautiful Disaster of a Car

https://www.theatlantic.com/technology/2026/11/rip-cybertruck/689340/
2•paulpauper•1h ago•0 comments