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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!

Israel's Defense Innovation Industrial Base

https://www.israeltechinsider.com/p/inside-israels-defense-innovation
1•yonbon21•44s ago•0 comments

404PageFound – Active Vintage Websites, Old Webpages, and Web 1.0

https://www.404pagefound.com
1•OuterVale•3m ago•0 comments

Ask HN: AI-first SaaS vs. AI-assisted. which one will survive?

1•kathir05•4m ago•0 comments

I built Rubric, an open source Sentry for AI. Looking for beta testers

https://github.com/tryrubric/rubric
1•tryrubric•5m ago•0 comments

How we made Ramp Sheets self-maintaining

https://twitter.com/RampLabs/status/2036165188899012655
1•ramonga•5m ago•0 comments

The Armor Gap

https://danieltan.weblog.lol/2026/03/the-armor-gap
1•danieltanfh95•14m ago•0 comments

Falling Sand Engine/Sandbox

https://sandspiel.club/
1•Imustaskforhelp•15m ago•0 comments

I built a tool that tells you NOT to build your startup idea – DontBuild.It

https://dontbuild.it/
1•dragonmann•17m ago•0 comments

Open-Source AI Text-to-Speech Models You Can Run Locally for Natural Voice

https://firethering.com/best-open-source-tts-models/
1•steveharing1•18m ago•0 comments

Silicon Valley in Your Pocket

https://siliconvalleyinyourpocket.com/
1•larsling•20m ago•0 comments

ICE: $45 an Hour to Stand There. TSA: $0 an Hour to Keep You Safe

https://botonomous.ai/featured/government_shutdown/article-v2.html
2•botonomous•20m ago•0 comments

Ask HN: Google account on old yahoo.com email hijacked to Google Workspace

2•FlyingAvatar•22m ago•0 comments

AI Agents Can Autonomously Perform Experimental High Energy Physics

https://arxiv.org/abs/2603.20179
1•KolenCh•24m ago•1 comments

Asia boosts coal use as Iran war squeezes global LNG supplies

https://www.npr.org/2026/03/24/g-s1-114940/asia-boosts-coal-use-as-iran-war-squeezes-global-lng-s...
1•geox•25m ago•0 comments

The Rise of the Ray-Ban Meta Creep

https://www.wired.com/story/the-rise-of-the-ray-ban-meta-creep/
2•thm•25m ago•0 comments

DOGE Goes Nuclear: How Trump Invited Silicon Valley into Nuclear Power Regulator

https://www.propublica.org/article/trump-nuclear-power-nrc-safety-doge-vought
2•ourmandave•26m ago•0 comments

Coding After Coders: The End of Computer Programming as We Know It

https://www.nytimes.com/2026/03/12/magazine/ai-coding-programming-jobs-claude-chatgpt.html
1•nguyentranvu•27m ago•1 comments

Debunking Zswap and Zram Myths

https://chrisdown.name/2026/03/24/zswap-vs-zram-when-to-use-what.html
3•javierhonduco•30m ago•0 comments

Building a symbolic math REPL in C

https://github.com/marcomit/derive.c
1•marcomit•33m ago•1 comments

Aletheia – deterministic COBOL verification for mainframe migrations

https://github.com/Aletheia-Verification/Aletheia
2•HectorBlai•33m ago•0 comments

Porting Doom to AIX on IBM RS/6000 [video]

https://www.youtube.com/watch?v=XzhCGSE7KKw
1•hxorr•35m ago•0 comments

LLM Neuroanatomy II: Modern LLM Hacking and Hints of a Universal Language?

https://dnhkng.github.io/posts/rys-ii/
2•realberkeaslan•36m ago•0 comments

Ask HN: Anyone trading prediction markets programmatically?

1•sharp_runner_84•38m ago•0 comments

Hack discovered at (NL) Ministry of Finance; Unclear if data was accessed

https://nltimes.nl/2026/03/24/hack-discovered-ministry-finance-unclear-data-accessed
1•mvdwoord•42m ago•0 comments

USA bans all new routers for consumers

https://www.heise.de/en/news/USA-bans-all-new-routers-for-consumers-11222049.html
6•esher•42m ago•0 comments

Synaps a self-hosted personal health monitor as a weighted knowledge grap

https://github.com/scerelli/SYNAPS
1•succo•44m ago•1 comments

Steve Jobs, speech at the Apple campus (1999) [video]

https://www.youtube.com/watch?v=EoM2Y2KO6kU
1•rbinv•45m ago•0 comments

Can It Resolve Doom? Game Engine in 2k DNS Records

https://core-jmp.org/2026/03/can-it-resolve-doom-game-engine-in-2000-dns-records/
2•Einenlum•47m ago•0 comments

Yann LeCun's LeWorldModel: Stable End-to-End JEPA from Pixels

https://le-wm.github.io/
2•matthieu_bl•47m ago•1 comments

America's Chief Financial Officers Say AI Is Coming for Admin Jobs

https://www.wsj.com/tech/ai/ai-admin-job-market-6a1c3436
2•cebert•49m ago•1 comments