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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!

We discover that: (I) 8 VC − CBG is NP-complete and (II) VC − CBG ∈ P [pdf]

https://kunalrelia.github.io/img/VCCBG.pdf
1•theanonymousone•1s ago•0 comments

SAIR Open Math OS Released

https://terrytao.wordpress.com/2026/10/16/sair-open-math-os-released/
1•smilelamp•9s ago•0 comments

A Chinese Perspective on "On Social Reality in China"

https://www.greaterwrong.com/posts/m4fWCPqWkpb39SKi7/
1•owenshen24•13s ago•0 comments

I've debated with Israel's fervent defenders NAZA debunks their talking points

https://www.theguardian.com/commentisfree/2026/oct/16/naza-israel-film
2•mo7061•2m ago•0 comments

Designing more efficient quantum circuits with Claude

https://www.anthropic.com/research/designing-efficient-quantum-circuits
1•pretext•2m ago•0 comments

Clojurific: ClojureScript compiler fork, optimized for modern JavaScript

https://github.com/WhimsicalCode/clojurific
1•simonpure•2m ago•0 comments

World time to drop the leap second from May 2027

https://www.euronews.com/2026/10/16/global-timekeeping-rules-change-leap-second-scrapped-from-2027
1•giuliomagnifico•2m ago•0 comments

Katie Zacharia Is Fired After 5 Days as White House Press Secretary

https://www.nytimes.com/2026/10/16/us/politics/katie-zacharia-fired-press-secretary.html
1•mikelgan•3m ago•1 comments

Reddit moderators remove post showing Tesla's flying ban on political content

https://twitter.com/Polymarket/status/2111108345117778120
1•bilsbie•3m ago•0 comments

Aesop's Fables

https://read.gov/aesop/001.html
2•shadow28•5m ago•0 comments

Big Tech Oligarchs Have a Terrible Plan for Humanity

https://www.theatlantic.com/ideas/2026/10/ai-regulation-transhumanism-oligarchs/689013/
1•DASD•6m ago•1 comments

Spear Phishing

https://en.wikipedia.org/wiki/Phishing
1•wslh•6m ago•0 comments

REKI – Registering Knowledge in VLAs

https://kyutai.org/reki/
1•armcat•9m ago•0 comments

(De)Generative Art Clelia

https://www.rockini.name/ga/
2•notorandit•9m ago•1 comments

Credit Where Credit Is Due

https://thefloatingcontinent.com/blog/credit-is-due/
2•evakhoury•9m ago•0 comments

Show HN: What will you say to 1M people?

https://thesoapbox.email
1•mgirkins•10m ago•0 comments

Open-weight models 88% more susceptible to cyber attacks

https://www.promptarmor.com/resources/open-weight-susceptibility
3•fdr•10m ago•0 comments

Show HN: A "falling block puzzle game"

https://tetracube.fun/
1•HoneySpoons•13m ago•1 comments

Training Natural Language Verifiers with Lean

https://huggingface.co/papers/2610.17697
3•andes314•15m ago•0 comments

China Reportedly Planning AI Export Controls, Citing National Security

https://www.pcmag.com/news/china-reportedly-planning-ai-export-controls-citing-national-security
2•andsoitis•15m ago•0 comments

Munich dumps proprietary for open source (again) – but no Linux desktop

https://www.zdnet.com/business/munich-proprietary-open-source-no-linux-desktop/
1•CrankyBear•16m ago•0 comments

Australia employment slides 39,300 in September, jobless at 4.7%

https://www.reuters.com/world/asia-pacific/australia-employment-slides-39300-september-jobless-47...
2•frank_clover•17m ago•0 comments

Ona (Gitpod) signup is closed

https://app.gitpod.io/login?signup=closed
2•bmacho•18m ago•1 comments

US is reviving shuttered nuclear plants for (possibly) data centers demand

https://www.usnews.com/news/best-states/iowa/articles/2026-10-16/us-is-reviving-shuttered-nuclear...
3•netfortius•19m ago•0 comments

China Proposes Export Controls on AI Technologies

https://www.wsj.com/economy/trade/china-proposes-export-controls-on-ai-technologies-75ac2030
2•andsoitis•21m ago•0 comments

Run your own Flipper One

https://docs.flipper.net/one/dev-log/10
3•mnem•21m ago•0 comments

The most life-changing books, statistically

https://residualthoughts.substack.com/p/a-statistical-guide-to-the-most-life
1•7777777phil•23m ago•2 comments

China proposes export controls on open weight models

https://reddit.com/r/LocalLLaMA/comments/1x7g3zq/china_proposes_export_controls_on_23_ai/
4•dannyw•23m ago•0 comments

Russian Officer Turned Against His Country and Helped Ukraine Kill Hundreds

https://www.wsj.com/world/russian-defector-deadly-sabotage-campaign-a95d163c
3•7777777phil•25m ago•0 comments

Hillclimb: Open-source AlphaEvolve-style search with Claude Code and Codex

https://github.com/rebase-energy/hillclimb
1•robertroosalu•25m ago•0 comments