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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!

Inverse Problem

https://en.wikipedia.org/wiki/Inverse_problem
1•soupspaces•1m ago•0 comments

Physicists discover a hidden gluon structure inside protons

https://www.sciencedaily.com/releases/2026/08/260815064805.htm
2•gradus_ad•1m ago•0 comments

Play Anthakshari Online

https://anthakshari.ai/
2•hareeshimo•5m ago•0 comments

Israeli minister calls for killing '30 to 40′ Palestinians in Gaza nightly

https://www.aljazeera.com/news/2026/8/16/israeli-minister-calls-for-killing-30-to-40-palestinians...
4•LAC-Tech•10m ago•1 comments

Prolly: A content-addressed ordered map built on prolly trees

https://github.com/crabbuild/prolly
1•forhappy•11m ago•0 comments

Show HN: Continuum – Financial simulations for DIY multimillionaires

https://continuum-app.xyz/
1•charleswcho•13m ago•1 comments

Wallflower – A Social Reader

https://thewallflower.app/about
1•tldrthelaw•23m ago•0 comments

Rhombus 1.1 is now available

https://blog.racket-lang.org/2026/08/rhombus-v1.1.html
3•spdegabrielle•24m ago•1 comments

Social Processes and Proofs of Theorems and Programs (1979)

https://dl.acm.org/doi/10.1145/359104.359106
3•lioeters•34m ago•0 comments

Harvestman Spider with a 'Black Bunny' Head Captured on Video

https://allthatsinteresting.com/bunny-harvestman-spider
1•thunderbong•35m ago•0 comments

Applying a photosynthetic process to treat "dry eye"

https://www.science.org/content/blog-post/taking-tip-plants-eyes
1•gumby•37m ago•0 comments

Show HN: Convertix – Fast, 100% in-browser media and QR tools

https://convertix-fast-imager-co.blogspot.com/p/blog-page.html
1•convertix123•40m ago•0 comments

The CLI your AI agent drives to manage your knowledge graph

https://useokf.com/
1•jhgaylor•40m ago•0 comments

The System from Nowhere

https://mail.cyberneticforests.com/the-system-from-nowhere/
1•peterm4•46m ago•0 comments

The Life and Death of Direct File [pdf]

https://www.ischool.berkeley.edu/sites/default/files/vinton_report_5.pdf
25•ronbenton•54m ago•2 comments

Hawaii flooded by Lala with thousands without power [video]

https://www.youtube.com/watch?v=gKzA4zDHyUc
1•Bender•54m ago•0 comments

The federal keyword lists that canceled billions in research funding

https://www.highereddive.com/news/inside-the-federal-keyword-lists-that-canceled-billions-in-rese...
7•walrus01•58m ago•0 comments

Harnessing the Power of Slop Driven Development

https://hank.bond/posts/harnessing-the-power-of-slop-driven-development/
2•hankbond•1h ago•1 comments

Kindred Sciences Unveils First Dogs Genetically Edited to Remove Dog Allergen

https://www.businesswire.com/news/home/20260805451804/en/Kindred-Companion-Sciences-Unveils-First...
3•ca98am79•1h ago•0 comments

TSMC Uses Old Fabs to Make New Chips [video]

https://www.youtube.com/watch?v=cDxVYQrxeiQ
6•eig•1h ago•2 comments

Webmaster a Manifesto for Everyone

https://brennan.day/webmaster-a-manifesto-for-everyone/
9•OuterVale•1h ago•2 comments

Conversion of CO2 to CO by Solvated Electrons in Molten Salts

https://pubs.acs.org/aelccp/article/11/8/5297/5243806/
1•car•1h ago•0 comments

Reticulum – Decentralized Mesh Network

https://reticulum.network/
3•sudo_cowsay•1h ago•1 comments

The Chauffeur Problem

https://engines.egr.uh.edu/episode/1495
1•leowoo91•1h ago•0 comments

Can you fit a song into a QR code? [YouTube]

https://www.youtube.com/watch?v=w5hIdQcUnRE
2•qingcharles•1h ago•0 comments

Show HN: A visual ping utility that is pretty

https://source.tube/ache/rusty-ping
1•_ache_•1h ago•0 comments

With OpenRouter, Is Stripe Becoming the Amazon of AI

https://github.com/getlago/lago/wiki/With-OpenRouter,-is-Stripe-becoming-the-Amazon-of-AI
2•AnhTho_FR•1h ago•2 comments

The Metabase SQLi: Exploited in the Wild

https://www.wiz.io/blog/inside-the-metabase-sqli-exploited-in-the-wild
1•ghiculescu•1h ago•0 comments

Qwen 3.8 27B is excellent, but it defaults to overthinking things

https://simonwillison.net/2026/Aug/16/qwen-38-27b/
6•bilsbie•1h ago•2 comments

Slop Rolls Downhill

https://nadeeshacabral.com/posts/slop-rolls-downhill/
6•lunarcave•1h ago•2 comments