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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!

I took my Rust GUI from 135 MB to 30 MB by ditching the GPU

https://trystan-sarrade.com/article/rust-gui-135mb-to-30mb-egui-to-slint/
1•oshanz•6m ago•0 comments

Tell HN: Scribd Breached

3•x______________•6m ago•0 comments

Flock camera searches fell 95% after a dispatcher's misconduct was caught

https://www.wkyc.com/article/news/investigations/flock-camera-searches-fall-95-percent-highland-h...
2•MilnerRoute•11m ago•1 comments

Hi3D Launches AI 3D Model with 2048³ Voxel Resolution

https://3dprintingindustry.com/news/hi3d-launches-ai-3d-model-with-2048%C2%B3-voxel-resolution-25...
1•noobplus•14m ago•0 comments

Video deconstructing how Jev works

https://www.youtube.com/watch?v=aIxSu5vqu6E
1•mesanu•18m ago•0 comments

Kotlin Flow: Bugs That Look Correct at First

https://kt.academy/article/kaustubh_flow_bugs_that_look_correct_at_first
1•TheWiggles•19m ago•0 comments

OpenAI to force data sharing for Daybreak blue users even when users opt out

https://community.openai.com/t/daybreak-blue-data-use-to-improve-models/1411182
1•ospray•22m ago•1 comments

The modern TypeScript runtime for serious developers

https://ende.sh
1•hn-aarvin•26m ago•0 comments

Vrayas and Co. – Bespoke Iced-Out Jewellery, Made to Order

https://vrayasandco.com/
1•VrayasMehra•34m ago•0 comments

How do you measure whether your coding agent is becoming more effective?

1•manytimesfail•39m ago•0 comments

Ask HN: Has Fable begun to autocorrect itself inline in its responses for you?

1•cromka•44m ago•1 comments

Threads, Mutexes, and Atomics: Start with What Can Go Wrong

https://www.tedkoomen.com/blog/engineering/threads-mutexes-and-atomics/
1•eigenBasis•44m ago•0 comments

That's why your GH green wall/graph is no longer green on halloween

https://github.com/orgs/community/discussions/178487
1•paaloeye•47m ago•1 comments

Do Defenders Still Matter?

https://www.ac3.com.au/resources/ai-is-prolific-do-defenders-still-matter
1•lidder86•48m ago•1 comments

I don't think AGI is right around the corner (2025)

https://www.dwarkesh.com/p/timelines-june-2025
4•droidjj•48m ago•1 comments

Download YouTube Videos, Playlists and Channels Easily with Python Copy

https://github.com/pH-7/Download-Simply-Videos-From-YouTube
2•jacksons3•52m ago•0 comments

I built autonomous navigation SDKs for drones and UGVs from scratch

https://www.vishwagw.me/
1•vishwagw98•57m ago•0 comments

Show HN: Send to dot–share a phone photo into your existing ChatGPT conversation

https://github.com/bryanzk/send-to-dot
1•bryanzk•1h ago•0 comments

Reimagining the Internet 42. Maciej Ceglowski, Pinboard (2021) [video]

https://www.youtube.com/watch?v=OTPqaPLEd8E
1•kome•1h ago•0 comments

Qntm – end to end encrypted messaging for agents and humans

https://qntm.corpo.llc/launch/
1•vessenes•1h ago•0 comments

Subvocal guys just made a worse clone of a Cornell lab's research from 2023

https://twitter.com/AarushYadav47/status/2116198463847408066
1•unfortunatelynu•1h ago•0 comments

The Harness and Memory Architecture Behind Self-Updating Docs

https://www.mintlify.com/blog/harness-and-memory-architecture-behind-self-updating-docs
2•hanyiwang•1h ago•0 comments

Postgres 19 is late, and it's AI's fault

http://rhaas.blogspot.com/2026/10/postgres-19-is-late-and-its-ais-fault.html
5•soheilpro•1h ago•1 comments

Making it easier for websites to express AI training preferences

https://openai.com/index/helping-websites-express-ai-training-preferences/
2•soheilpro•1h ago•1 comments

Supabase Compute

https://supabase.com/blog/supabase-compute-private-alpha
2•dotmanish•1h ago•0 comments

Show HN: Ghost in the Log – a Halloween log investigation with a live AI

https://ghost-in-the-log.vercel.app/
1•moruku36•1h ago•0 comments

Anthropomorphize AI, but first learn what 'AI wants' means

https://blog.kolen.dev/LLM/want
1•KolenCh•1h ago•0 comments

Rewriting Copyright Law for Generative AI Would Hurt Everyone

https://www.eff.org/deeplinks/2026/10/rewriting-copyright-law-generative-ai-would-hurt-everyone
3•ilreb•1h ago•2 comments

Patching APKs: Smali, DEX, Rebuild, and Resigning

https://www.yourdev.net/blog.php?post=patching-apks-smali-dex-rebuild-and-signing
1•noppers•1h ago•1 comments

Stephen Wolfram's new philosophy book: What Ultimately Is There?

https://www.amazon.com/dp/1579551017
2•alok-g•1h ago•0 comments