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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•11mo 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!

Ask HN: Will we ever do something about patent trolls?

2•giancarlostoro•1m ago•0 comments

Fewer than 3 in 10 register for HMRC's Making Tax Digital shake-up

https://www.theregister.com/2026/04/10/mtd_hmrc/
1•Brajeshwar•2m ago•0 comments

Claude Mythos and misguided open-weight fearmongering

https://www.interconnects.ai/p/claude-mythos-and-misguided-open
1•speckx•3m ago•0 comments

Ask HN: How do designers and marketers use Command Line? AI? Technical tools?

1•vietthan•4m ago•0 comments

How do you and your team manage secrets day to day?

1•markvm•4m ago•0 comments

The Chilling Role of ChatGPT in Mass Shootings and Other Violence

https://www.motherjones.com/media/2026/04/chatgpt-tumbler-ridge-fsu-openai-chatbots-mass-shootings/
1•cdrnsf•6m ago•0 comments

Powell, Bessent discussed Mythos cyber threat with major U.S. banks

https://www.cnbc.com/2026/04/10/powell-bessent-us-bank-ceos-anthropic-mythos-ai-cyber.html
2•kaycebasques•7m ago•0 comments

Propulsion and Energy Physicist Photos at Deep Tech Week NYC 2026

https://www.flickr.com/photos/timventura/albums/72177720333020849/
1•timventura•7m ago•1 comments

The growth metric Silicon Valley loves most is also its least trusted

https://www.latimes.com/business/story/2026-04-07/growth-metric-silicon-valley-loves-most-is-also...
2•1vuio0pswjnm7•7m ago•0 comments

The effects of caffeine consumption do not decay with a ~5 hour half-life

https://www.lesswrong.com/posts/vefsxkGWkEMmDcZ7v/the-effects-of-caffeine-consumption-do-not-deca...
3•swah•8m ago•0 comments

Show HN: LightningWindowSwitcher – search for open windows on macOS/Win

https://lightningwindowswitcher.com/
1•afonso_soares•9m ago•0 comments

A Chicago Fan's Recordings of 10k Music Shows Are Now Online

https://blockclubchicago.org/2026/04/10/from-early-nirvana-to-phish-a-chicago-fans-secret-recordi...
2•xnx•9m ago•0 comments

Most Americans are using AI but are sick and tired of hearing about it: survey

https://nypost.com/2026/04/09/tech/most-americans-are-using-ai-but-people-are-sick-and-tired-of-h...
2•1vuio0pswjnm7•9m ago•0 comments

Journalists, whistleblowers and activists should set a Dead Man's Switch

https://alcazarsec.com/deadmanswitch/use-cases/journalists
1•alcazar•11m ago•0 comments

Rethinking the Riemann Hypothesis through wave interactions (Flux perspective)

https://zenodo.org/records/19450903
2•kimhanhee•12m ago•0 comments

AI Readiness Checker – See how AI bots interact with your website

https://zerokit.dev/tools/ai-readiness.html
1•SCbusiness•13m ago•0 comments

EU Big Tech fines top $7B in 2 years

https://www.cnbc.com/2026/04/10/google-meta-big-tech-6-billion-euros-eu-fine.html
3•1vuio0pswjnm7•13m ago•0 comments

Founders, Open Your App

https://timleland.com/founders-open-your-app/
1•TimLeland•14m ago•0 comments

Show HN: Zeroclawed: Secure Agent Gateway

https://github.com/bglusman/zeroclawed
3•bglusman•14m ago•0 comments

Is Schoolwork Optional Now?

https://www.theatlantic.com/technology/2026/04/ai-agents-school-education/686754/
1•JumpCrisscross•14m ago•0 comments

A full-on embrace: how the EU's largest news publisher fell in love with the US

https://www.theguardian.com/media/2026/apr/08/how-axel-springer-germany-mathias-doepfner-us-polit...
1•doener•15m ago•0 comments

Proton: Born Private

https://proton.me/mail/born-private
2•qkc3p3Jbf4•16m ago•1 comments

CPUid Compromised

https://www.bleepingcomputer.com/news/security/supply-chain-attack-at-cpuid-pushes-malware-with-c...
4•pashadee•17m ago•0 comments

March inflation soars, confirming Iran war price shock

https://www.axios.com/2026/04/10/cpi-march-inflation-iran-trump
2•Amorymeltzer•17m ago•1 comments

Show HN: VigIA – A deterministic FSM in .NET 10 to stop LLM hallucinations

https://github.com/JordanCT/VigIA-Orchestrator
1•JordanCT•17m ago•0 comments

Installing Every* Firefox Extension

https://jack.cab/blog/every-firefox-extension
2•speckx•18m ago•1 comments

Roundtable – Multi-character chat where each character runs on a different model

https://github.com/Kaidorespy/Roundtable
2•formslip•19m ago•0 comments

Food for Agile Thought #539: Sam Altmann? Bottom-Up Roadmaps, Disruption Cycles

https://age-of-product.com/food-agile-thought-539-sam-altmann/
1•swolpers•19m ago•0 comments

Fire – Foundation for Individual Rights and Expression

https://www.fire.org/
1•bilsbie•19m ago•0 comments

Practical Antiforgery in Software Design

https://hudlow.org/2026/practical-antiforgery
2•danhudlow•20m ago•0 comments