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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!

Aluminum Frame PC Fan Corsi-Rosenthal Build (2023)

https://itsairborne.com/aluminum-frame-pc-fan-corsi-rosenthal-build-c28aa7ca8927
1•walterbell•2m ago•0 comments

Anthropic Is not worth much at all

https://s-1.vercel.app/posts/why-openrouter-can-be-the-next-great/
1•Taikhoom10•2m ago•2 comments

Executable SOAR playbook dataset – AI agents pay per record via HTTP 402

https://lateos.ai/soar/
1•leochong•5m ago•0 comments

The Infinite Policeman – A Crookery

https://medium.com/luminasticity/the-infinite-policeman-chapter-3-d3e8e30a6969
1•bryanrasmussen•7m ago•0 comments

Show HN: Curl Stock Research

https://stockchat.sh/cli
1•netless•9m ago•0 comments

Flock puts new 'guardrails' on license-plate cameras. Critics skeptical

https://www.sfchronicle.com/crime/article/flock-cameras-ceo-surveillance-policy-22384139.php
3•newsomix9xl•12m ago•0 comments

Openleaf: Overleaf's workflow. Obsidian's interface. None of the cloud

https://github.com/vicky157/openleaf
1•vikashjohn2505•12m ago•0 comments

The Jobless Boom Has Arrived

https://www.wsj.com/economy/jobs/the-jobless-boom-has-arrived-41361a06
3•petethomas•15m ago•0 comments

Daily driving PostmarketOS (Summer 2026)

https://blog.senderolinux.com/daily-driving-postmarketos-summer-2026/
1•WhyNotHugo•15m ago•0 comments

Air Purifiers as White Noise Machines

https://www.jefftk.com/p/air-purifiers-as-white-noise-machines
1•luu•16m ago•1 comments

End-to-end encrypted .env sharing

https://github.com/p-arndt/shenv
1•kermatt•17m ago•0 comments

How AI engines cite brands?

https://www.leapd.ai/blog/ai-visibility/how-chatgpt-google-ai-overviews-and-perplexity-source-inf...
2•Angelbirth1369•19m ago•1 comments

Ask HN: How are you preventing brainrot?

1•flyingcoder•19m ago•0 comments

Ask HN: What is something produced by GenAI that you use regularly?

1•razorbeamz•21m ago•0 comments

AI Coding Has Erased the Supposed Advantage of Statically Typed Languages

https://yyhh.org/blog/2026/08/ai-coding-has-erased-the-supposed-advantage-of-statically-typed-lan...
4•huahaiy•23m ago•1 comments

Qwen3.8 27B

https://huggingface.co/Qwen/Qwen3.8-27B
2•kristjansson•26m ago•0 comments

An open-source knowledge graph for traceable AI decisions

https://github.com/semantica-agi/semantica
1•Nina_antalpha•33m ago•0 comments

A Black Surrogate Fights for Bodily Autonomy in High-Stakes Legal Battle

https://www.theroot.com/a-black-surrogate-fight-for-bodily-autonomy-in-high-sta-2000120819
1•pudgywalsh•34m ago•0 comments

Error by AI scribe during medical appointment leaves patient devastated

https://www.abc.net.au/news/2026-08-14/ai-medical-scribe-error-leaves-patient-devastated/107031672
4•ahonhn•40m ago•1 comments

Fossils show carbon emissions harm forests, not 'green the planet'

https://www.theguardian.com/us-news/2026/aug/13/forests-carbon-dioxide-emissions
4•littlexsparkee•44m ago•0 comments

Structured Decoding with XGrammar

https://aramesh10.github.io/xgrammar/
2•matt_d•50m ago•0 comments

OpenAI Is Building a ChatGPT Wallet for Agentic Purchases

https://runtimewire.com/article/exclusive-openai-is-building-a-chatgpt-wallet-for-agentic-purchases
1•ryanmerket•55m ago•0 comments

SQawk: SQL-based Awk tool for CSV/TSV files

https://crates.io/crates/sqawk
2•jgarzik•55m ago•0 comments

Why Our Memory Slips After Age 50

https://erictopol.substack.com/p/why-our-memory-slips-after-age-50
7•brandonb•55m ago•1 comments

Konjugate: Graph-native visual simulation with AI modeling workflows

https://www.konjugate.com/
1•zenin•56m ago•0 comments

Female assassin kills Ukraine submarine commander who defected to Russia

https://www.yahoo.com/news/world/articles/woman-assassinates-ukrainian-submarine-commander-143742...
6•RickJWagner•57m ago•0 comments

When Agents Talk: Honeytokens Under Shared Memory

https://arxiv.org/abs/2608.11436
1•sbulaev•58m ago•0 comments

Even Claude Is in the Dark About Dario Amodei's Wife

https://www.wsj.com/tech/ai/claude-dario-amodei-wife-anthropic-e1eeda7d
4•latchkey•59m ago•1 comments

DeepSeek Harness Plugin and Agent Profile Package Index

https://dsh-index.xlings.org
1•sunrisepeak•59m ago•0 comments

Geo tool with no LLM run

https://see-geo.com
1•tnaaron•1h ago•1 comments