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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•10mo 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!

"This Is Not the Computer for You" Debunked

https://lapcatsoftware.com/articles/2026/3/7.html
1•latexr•45s ago•0 comments

Show HN: Fatal Core Dump – a debugging murder mystery played with GDB

https://www.robopenguins.com/fatal_core_dump/
2•axlan•3m ago•0 comments

Stellar engines and Dyson bubbles can be stable

https://arxiv.org/abs/2603.00203
2•johnbarron•5m ago•0 comments

Natural Emergent Misalignment from Reward Hacking in Production RL [pdf]

https://assets.anthropic.com/m/74342f2c96095771/original/Natural-emergent-misalignment-from-rewar...
3•marcuschong•5m ago•0 comments

A Tiny Camera Revealed a Hidden Passage in the Great Pyramid

https://modernengineeringmarvels.com/2026/03/13/a-tiny-camera-revealed-a-hidden-passage-in-the-gr...
4•Brajeshwar•8m ago•0 comments

Iranian missile strike damaged 5 US refueling planes at Saudi airbase

https://www.timesofisrael.com/liveblog_entry/iranian-missile-strike-damaged-5-us-refueling-planes...
2•johnbarron•8m ago•0 comments

What is wisdom, and can it be taught?

https://knowablemagazine.org/content/article/mind/2026/what-is-wisdom-can-it-be-taught
3•knowablemag•9m ago•0 comments

11 Years of World of Matthew

https://worldofmatthew.com/blog/11/
3•worldofmatthew•9m ago•0 comments

NYT Connections style game in 195 languages

https://lingopop.unitz.app
2•pnhoang•12m ago•1 comments

Safari web browser bugs: A year in review

https://lapcatsoftware.com/articles/2026/3/6.html
3•latexr•14m ago•0 comments

Games with loot boxes to get minimum 16 age rating across Europe

https://www.bbc.com/news/articles/cge84xqjg5lo
2•gostsamo•14m ago•0 comments

What a Friday Night Build Session Taught Us About Failing Loud

https://wire.wise-relations.com/news/2026-03-14-fail-loud/
3•chelm•14m ago•0 comments

Why low-frequency spectrum is emerging as a quiet contender for future networks

https://techxplore.com/news/2026-03-frequency-spectrum-emerging-quiet-contender.html
1•Brajeshwar•14m ago•0 comments

Xi's anti-corruption drive began 14 years ago. Why are the purges still going?

https://www.bbc.com/news/articles/c78xxyyqwe7o
3•tartoran•15m ago•0 comments

Biases abound when predicting biomarkers from histological images

https://www.nature.com/articles/s41551-026-01616-8
1•PaulHoule•16m ago•0 comments

What Did You Forget to Prompt? $87,500 in Fraud from Vibe-Coded Startup

https://qualitymax.io/vibe-check
2•qualitymax•17m ago•1 comments

Anthropic, Do Not A/B Test My Workflow

https://backnotprop.com/blog/do-not-ab-test-my-workflow/
3•ramoz•21m ago•0 comments

BuzzFeed Nearing Bankruptcy After Disastrous Turn Toward AI

https://futurism.com/artificial-intelligence/buzzfeed-disastrous-earnings-ai
3•jsheard•21m ago•0 comments

Spaced Repetition Algorithm: A Three‐Day Journey from Novice to Expert

https://github.com/open-spaced-repetition/fsrs4anki/wiki/Spaced-Repetition-Algorithm:-A-Three%E2%...
3•primenumber1•22m ago•1 comments

I got tired of GitHub's starred repo search, so I built a better one

https://github.com/alonronin/orbit
2•alonronin•24m ago•0 comments

Free Multi Cloud TCO and Feature Comparison

https://cloudcompare.online
1•rohan044•28m ago•0 comments

systemd 260-rc3 Released With AI Agents Documentation Added

https://www.phoronix.com/news/systemd-260-rc3
2•voxadam•29m ago•0 comments

Trump: U.S. hit military sites on Iranian Kharg island

https://www.iranintl.com/en/202603137666
2•ukblewis•30m ago•1 comments

After Decapitation, What's Next?

https://www.gzeromedia.com/by-ian-bremmer/after-decapitation-whats-next
2•petethomas•31m ago•0 comments

Senate Votes to Block Private Equity from Buying Homes

https://www.thebignewsletter.com/p/boom-senate-votes-to-block-private
4•pseudolus•31m ago•2 comments

Desperate for skilled workers, a furniture maker looks to apprenticeships

https://www.npr.org/2026/03/13/nx-s1-5727509/apprenticeships-manufacturing-workforce-trump-arkansas
1•toomuchtodo•31m ago•0 comments

We visited "ground zero" for hospice fraud: Los Angeles, California

https://www.cbsnews.com/projects/2026/hospice-fraud/
2•gmays•33m ago•0 comments

Hollywood Hacks OT: Cybersecurity Lessons from the Movies

https://www.emberot.com/resources/blog/ot-cybersecurity-lessons-from-the-movies/
2•TheWiggles•35m ago•0 comments

40 Years of Wireless Evolution Leads to a Smart, Sensing Network

https://spectrum.ieee.org/telecom-history-1g-to-6g
2•Brajeshwar•36m ago•0 comments

"Added 1M context window for Opus 4.6 by default for Max, Team, and Enterprise"

https://raw.githubusercontent.com/anthropics/claude-code/refs/heads/main/CHANGELOG.md
7•taspeotis•38m ago•1 comments