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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!

Show HN: Data-driven GEO and marketing agent platform

https://dageno.ai
1•timdageno•3m ago•0 comments

SpaceX is working with Cursor and has an option to buy the startup for $60B

https://techcrunch.com/2026/04/21/spacex-is-working-with-cursor-and-has-an-option-to-buy-the-star...
1•thiele•4m ago•0 comments

Reflecting on 50 years of environmental innovation

https://blogs.sas.com/content/sascom/2026/04/22/reflecting-on-50-years-of-environmental-innovation/
1•salkahfi•5m ago•0 comments

DuckDB Kernel – analytical execution runtime for Jupyter

https://github.com/hugr-lab/duckdb-kernel
1•articsputnik•8m ago•0 comments

XOR'ing a register with itself is the idiom for zeroing it out. Why not sub?

https://devblogs.microsoft.com/oldnewthing/20260421-00/?p=112247
3•ingve•9m ago•0 comments

Ask HN: Is USA at war with the rest of the world now?

2•roschdal•9m ago•1 comments

Creem Magazine is back in print and online after 33 years (2022)

https://sandboxworld.com/creem-magazine-is-back-in-print-and-online-after-33-years/
1•bjhess•14m ago•0 comments

Claude Cowork against your own cloud inference provider

https://claude.com/docs/cowork/3p/overview
2•nrsapt•14m ago•2 comments

Show HN: GPT-Image-2 Prompts

https://github.com/magiccreator-ai/awesome-gpt-image-2-prompts
1•kevinhacker•18m ago•0 comments

We found most apps send PII to LLMs and built a 2 line fix

https://getredacta.com/
2•SandiaDevGroup•24m ago•1 comments

Mistral Vibe

https://mistral.ai/products/vibe
1•hecanjog•25m ago•0 comments

Zappa: An AI powered mitmproxy

https://geohot.github.io//blog/jekyll/update/2026/04/15/zappa-mitmproxy.html
1•WithinReason•25m ago•0 comments

Show HN: Vibe Coding Games in Minutes

https://thornwood.bsct.so/
1•amin_biscuit•26m ago•0 comments

Valve's new Proton 11 ARM beta gets Hollow Knight on the Ayn Odin 2 Portal

https://www.notebookcheck.net/Valve-s-new-Proton-11-ARM-beta-gets-Hollow-Knight-Silksong-running-...
1•happymellon•29m ago•1 comments

The PowerShell-Haters Handbook

https://telcontar.net/Misc/rants/PowerShell
2•Mr_Minderbinder•30m ago•0 comments

Pioneer: Vibetune Your LLMs

https://pioneer.ai/
1•handfuloflight•30m ago•0 comments

Agents with Taste – How to transfer taste into an AI

https://emilkowal.ski/ui/agents-with-taste
2•dglzab•37m ago•0 comments

The FeMo-cofactor and classical and quantum computing

https://quantumfrontiers.com/2026/03/12/the-femo-cofactor-and-classical-and-quantum-computing/
1•EvgeniyZh•37m ago•0 comments

The Three Layers of Software Engineering

https://layers.lifebeyondfife.com/
1•lifebeyondfife•38m ago•0 comments

Open WebUI v0.9.0 adds desktop app with task scheduling

https://github.com/open-webui/open-webui/releases/tag/v0.9.0
2•simonjgreen•47m ago•0 comments

Show HN: DoShare Personal Cloud

https://cloud.doshare.me/auth/signup
1•vednig•50m ago•0 comments

Rspack 2.0

https://www.rspack.dev/blog/announcing-2-0
2•maxloh•56m ago•0 comments

A Man Who Invented the Future

https://hedgehogreview.com/web-features/thr/posts/the-man-who-invented-the-future
1•apollinaire•1h ago•0 comments

Show HN: Irregular German Verbs – a simple app, no ads or tracking

https://bacist.com/german-irregular-verbs-app/
4•baCist•1h ago•2 comments

China, India place strategic bets on clean energy (H2) out of favour in the West

https://www.reuters.com/sustainability/boards-policy-regulation/china-india-place-strategic-bets-...
2•alephnerd•1h ago•1 comments

Panipat: The Rise of the Mughals

https://www.historytoday.com/archive/feature/panipat-rise-mughals
1•Thevet•1h ago•0 comments

As We May Think

https://www.theatlantic.com/magazine/archive/1945/07/as-we-may-think/303881/
1•jxmorris12•1h ago•0 comments

Fast Image AI White Background

https://fastimage.ai/white-background
1•lucas0953•1h ago•0 comments

Firefox browser has started shipping Brave's adblock-rust engine

https://shivankaul.com/blog/firefox-bundles-adblock-rust
5•twapi•1h ago•1 comments

Pretrain vs. Fine-Tune

https://pub-c70e14727c3046cf8a36d9e598267788.r2.dev/26443b7e12/index.html
1•vinhnx•1h ago•0 comments