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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!

War has not halted the Gulf's data-centre boom

https://www.economist.com/business/2026/09/10/war-has-not-halted-the-gulfs-data-centre-boom
1•andsoitis•3m ago•0 comments

Better routing, probe fixes, plugin updates in Freenet/Hyphanet 0.7.5 build 1507

https://www.hyphanet.org/freenet-hyphanet-075-build-1507-fix-probe-routing-plugins-and-upkeep.html
1•ArneBab•4m ago•0 comments

Spectrogram – see your music as a moving 3D landscape

https://github.com/nijatburjiyev/spectral-relief
1•nijatburjiyev•5m ago•0 comments

US Military tests quantum sensors for flight navigation without GPS over Pacific

https://www.heise.de/en/news/US-military-tests-quantum-sensors-for-flight-navigation-without-GPS-...
1•marklit•6m ago•0 comments

Docket – Per-commit evidence records for agent-written code

https://github.com/Dillonsmart/docket
2•dillonsmartdev•11m ago•0 comments

How Modern Fascism Works – End Times Fascism – Naomi Klein and Astra Taylor

https://www.youtube.com/watch?v=aK2nLNiFEAQ
1•abathologist•11m ago•0 comments

The Case for Open-Weight Models and Why We Can't Trust Frontier Labs

https://www.provos.org/p/case-for-open-weight-models/
2•wslh•12m ago•0 comments

SecretGate – Hardened, self-hosted NGL alternative

https://github.com/sasiru-mindaka/Secret-Gate
1•sasiru-mindaka•15m ago•0 comments

Misleading Metaphors and Real Risks

https://aiguide.substack.com/p/misleading-metaphors-and-real-risks
2•lacunary•15m ago•0 comments

What's the smallest agent harness that is still architecturally complete?

https://github.com/earthwalker17/MiniDSH
1•earthwalker17•19m ago•0 comments

AI Tools Accelerates Coding, but Not Overall Software Delivery – GitLab Research

https://www.infoq.com/news/2026/06/ai-coding-outpaces-governance/
1•bucket2015•25m ago•0 comments

Dupster – A fast TUI for finding and removing duplicate files

https://github.com/karimz1/dupster
2•karimz1•25m ago•0 comments

Built a walkable 3D library of 200 public domain books

https://libraryafterdark.space/
2•theaijournalope•27m ago•1 comments

Show HN: MorphMove – a game where pieces change after moving

https://morphmove.com/
2•eropatori•29m ago•0 comments

Install iOS 27 today – there's no reason to wait

https://www.cultofmac.com/news/install-ios-27-today-how-to
3•bookofjoe•29m ago•0 comments

Research Paper: Sex, Politics, and Religion

https://nouswise.com/c/add2545d-a281-46a4-8d5c-3f186b85559b
2•kaven1234•29m ago•0 comments

Blockr – See what your Mac is talking to

https://twoplus11.com/blockr/
2•eustoria•30m ago•0 comments

If You Always Enjoy It, You're Not Pushing It Hard Enough–Benn Stancil

https://www.ssp.sh/blog/benn-stancil-on-deadlines-and-storytelling/
2•theanonymousone•31m ago•0 comments

Unwinding the Great Tech Power Grab

https://rebeccawilliams.info/unwinding-the-great-tech-power-grab/
1•eustoria•31m ago•0 comments

The Human Alliance

https://the-human-alliance.org
3•tcorcos•31m ago•1 comments

Ask HN: What if the step to control AI is to control the internet?

3•sourdecor•31m ago•0 comments

The EU wanted to kill the cookie banner, but then Google called

https://tuta.com/blog/why-eu-member-states-and-google-want-to-keep-cookie-banner
3•eustoria•32m ago•0 comments

Rate Your Agent's Memory

1•luvmakin•32m ago•0 comments

Show HN: USSR Unified Shell Script REPL

https://github.com/notlibrary/USSR
1•notlibrary•32m ago•0 comments

The next-generation framework for embedded applications

https://embassy.dev
1•Bluestein•34m ago•0 comments

Making Startups Powerful

https://www.paulgraham.com/powerful.html
2•aaraujo002•36m ago•0 comments

Show HN: Simpleboot and Easyboot

https://gitlab.com/bztsrc/easyboot
1•skrellm•40m ago•0 comments

Public DNS to evade Cloudflare blocking in Spain

https://github.com/Oihalitz/xdp-dns-evadeproxy
1•akyuu•41m ago•0 comments

Garry Tan wants US open-weight AI labs to 'distill' frontier models, too

https://techcrunch.com/2026/09/11/y-combinators-garry-tan-wants-u-s-open-weight-ai-labs-to-distil...
13•TheJCDenton•43m ago•3 comments

Practical Agentic RAG patterns implemented with LangGraph

https://github.com/ChandulaSenevirathna/Agentic_RAG
4•lokizzz•44m ago•0 comments