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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!

Trump: Ukraine should get a new president, blames Zelenskyy for US diesel prices

https://apnews.com/article/russia-ukraine-war-trump-putin-diesel-228ccf74b2848c1ff0ac23f038b37512
2•jacquesm•2m ago•0 comments

Concrete Lessons from Conway's Game of Life

https://mathemichel.substack.com/p/concrete-lessons-from-conways-game
1•birdculture•3m ago•0 comments

DigUp: Search files on Mac by what's in them, using EmbeddingGemma 2

https://github.com/ARahim3/DigUp
1•AbuAssar•4m ago•0 comments

Agentic Item Lifecycle (AILC) – How Pullboard Works

https://pullboard.dev/how/
1•Olscore•4m ago•0 comments

Apple may have an iPhone 18 Pro demand problem

https://www.androidauthority.com/iphone-18-pro-sales-3721452/
2•raffael_de•5m ago•0 comments

Vibe coded browser ports of Halo, The Simpsons: Hit And Run, GTA work well

https://kotaku.com/we-might-be-cooked-as-these-vibe-coded-web-browser-ports-of-halo-the-simpsons-...
6•astlouis44•5m ago•0 comments

Anthropic discloses 2 months old fake tip to police among new rogue AI incidents

https://www.reuters.com/world/us/anthropic-ai-model-submits-false-homicide-tip-police-website-202...
3•guessmyname•7m ago•0 comments

In agentic programming how do you handle follow up task

1•kaizencode•7m ago•0 comments

Why DuckDB 2.0 is faster

https://motherduck.com/blog/why-duckdb-20-is-faster/
1•tosh•9m ago•0 comments

Show HN: A functioning Celery Man computer

https://celeryman.fun/
2•turtlesoup•9m ago•0 comments

Show HN: Site is OK – website diagnostics and monitoring

https://siteisok.com/
1•yasenp•9m ago•0 comments

Best Free AI APIs for Developers in 2026

https://freeapihub.com/blog/best-free-ai-apis-developers
2•peter_d_sherman•12m ago•1 comments

Jev vs. Claude as blind headline judge: six gates before either touches a trade

https://alexvidovich.com/papers/text-judge
1•svidov222•15m ago•0 comments

FreeBSD Cope with Signal Fuckup

https://vermaden.wordpress.com/2026/10/10/freebsd-cope-with-signal-fuckup/
1•vermaden•16m ago•0 comments

Why the SoC Can't Run on Vibes

https://www.sentinelone.com/blog/why-the-soc-cant-run-on-vibes/
2•yarapavan•17m ago•0 comments

Only in Japan: The 1980's World of Vinyl Record Phone-In Gaming

https://ei3lh.eu/2026/10/10/the-bizarre-1980s-world-of-vinyl-record-phone-in-gaming/
1•austinallegro•17m ago•0 comments

A 3D-Printed Compliant Micro-Manipulator – XYZ Positioning down to 1µm [video]

https://www.youtube.com/watch?v=-mgqq0qdDRM
1•Teever•19m ago•0 comments

Luish: A vibe-coded shell that is better than bash or zsh

https://luispedro.substack.com/p/luish-a-vibe-coded-shell-that-is
1•luispedrocoelho•21m ago•0 comments

Artificial Intelligence as an Orchestration System

https://medium.com/@smoking2man/artificial-intelligence-as-an-orchestration-system-the-contradict...
1•Aldus551•21m ago•0 comments

ZJIT is now as fast as YJIT

https://railsatscale.com/2026-10-09-zjit-is-now-as-fast-as-yjit/
1•ksec•22m ago•0 comments

'Like a drill going into my eye':The mystery over Havana syndrome refuses to die

https://www.theguardian.com/us-news/ng-interactive/2026/oct/10/havana-syndrome-mystery-cia-russia
2•bookofjoe•23m ago•0 comments

Integrating Decision Models into Agent Harnesses

https://vivekhaldar.com/articles/llms-do-too-much-offload-to-decision-models/
1•gandalfgeek•24m ago•0 comments

Using KV cache as embeddings

https://breadbowl.ai/blog/breadbowl-embed/
1•mxudev•24m ago•1 comments

Bragg Mirrors

https://www.rp-photonics.com/bragg_mirrors.html
1•peter_d_sherman•26m ago•0 comments

Britain's £33M Balancing Day: Was the Wind Forecast Wrong?

https://a115.co.uk/could-a-better-wind-forecast-have-saved-britain/
2•a115ltd•26m ago•0 comments

Super Micro contractor pleads guilty in scheme to divert Nvidia chips to China

https://www.reuters.com/legal/government/super-micro-contractor-pleads-guilty-scheme-divert-ai-se...
1•giuliomagnifico•28m ago•0 comments

Tortugarr – Android TV app and automated installer for the *ARR stack

https://github.com/tortugarr/tortugarr
2•odwar420•30m ago•0 comments

Recognising Type 5 Diabetes

https://www.thelancet.com/journals/langlo/article/PIIS2214-109X(25)00474-7/fulltext
2•theanonymousone•31m ago•0 comments

EUV mirror / soft X-ray mirror

https://keytech.ntt-at.com/en/xray/prd_3004.html
1•peter_d_sherman•31m ago•0 comments

How we migrated Clera's 500 GB production Postgres database overnight

https://www.getclera.com/blog/how-we-migrated-to-clickhouse-managed-postgres
1•saisrirampur•32m ago•0 comments