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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!

Many surgical interventions are little better than placebo

https://www.economist.com/science-and-technology/2026/09/23/many-surgical-interventions-are-littl...
1•sohkamyung•1m ago•0 comments

The computer hacker who tried to take down Man City

https://www.bbc.co.uk/sport/football/articles/cwywld5v28jo
1•birdmania•4m ago•1 comments

The use of humor in depression: An integration of benefits and risks

https://www.sciencedirect.com/science/article/pii/S0272735826000905?via%3Dihub
1•bookofjoe•5m ago•0 comments

JuhRadial MX: Linux control for MX devices and generic

https://github.com/JuhLabs/juhradial-mx
1•JuhLabs•6m ago•0 comments

Show HN: Docspira – JSON/YAML/regex tools that never leave the browser

https://docspira.com/
1•Mortivox•8m ago•0 comments

OpenAI says its AI agents posted user images online in error

https://techxplore.com/news/2026-09-openai-ai-agents-user-images.html
1•geox•8m ago•0 comments

New species of parasitic wasp discovered in Assam's Dibru-Saikhowa National Park

https://researchmatters.in/news/new-first-of-its-kind-species-of-parasitic-wasp-discovered-in-ass...
1•thunderbong•9m ago•0 comments

Harari vs. Henrich: What science says about human evolution

https://josephheath.substack.com/p/harari-vs-henrich
1•Ariarule•13m ago•0 comments

No errors, no warnings, no gods, no masters – HTML Purity is a Fetish

https://shkspr.mobi/blog/2026/09/no-errors-no-warnings-no-gods-no-masters-html-purity-is-a-fetish/
1•edent•14m ago•0 comments

That About Wraps It Up for Stock Mac UI

https://inessential.com/2026/09/22/that-about-wraps-it-up-for.html
1•JumpCrisscross•16m ago•0 comments

Show HN: Blue Lock Farm – a Roblox wiki, database and tools

https://bluelockfarm.com/
1•richardharmer•17m ago•0 comments

Chinese AI models surge in global popularity – and Washington is worried

https://www.cnbc.com/2026/09/26/china-ai-global-adoption.html
1•pseudolus•23m ago•0 comments

The Americans Having the Most Sex

https://www.theatlantic.com/ideas/2026/09/religion-sex-recession-marriage/688774/
1•metanoia_•24m ago•1 comments

Show HN: Asụsụ Ọma, a free app for learning Igbo with native-speaker audio

https://asusuoma.com
1•ebenezerdon•30m ago•0 comments

The Cost of Blue Light: Multiorgan Pathology Induced by LED Exposure

https://www.biorxiv.org/content/10.64898/2026.09.11.750850v1.full
1•bilsbie•32m ago•0 comments

OK, so where are all these data centres?

https://www.ft.com/content/4c3f75a2-c2f9-4ef7-9895-21daf5e92dfe
1•Betelbuddy•32m ago•1 comments

What and Whose Knowledge? Measuring Epistemic Diversity in Large Language Models

https://arxiv.org/abs/2510.04226
1•daniel_iversen•36m ago•0 comments

The Aura Premium

https://twitter.com/netcapgirl/status/2086496076505497757
2•tosh•39m ago•0 comments

Show HN: Ollaya Web UI

https://github.com/samarkandiy/ollaya-web-ui
5•anongoogleuser•39m ago•0 comments

Software Renderer in Odin from Scratch

https://marianpekar.com/blog/software-renderer-in-odin-from-scratch-part-i
2•AlexeyBrin•39m ago•0 comments

Zeta(5) has been proven irrational (also Lean-verified)

https://www.reddit.com/r/mathematics/comments/1woe4gx/a_lean_formalization_of_zeta5_being_irratio...
2•ogogmad•40m ago•1 comments

Claude Opus 5.5 Should Raise Your Ambitions

https://thezvi.substack.com/p/claude-opus-55-should-raise-your
6•7777777phil•41m ago•1 comments

Beyond Tokenmaxxing

https://isaca.nl/beyond-tokenmaxxing/
1•ezrabuenk•46m ago•1 comments

Screw Is Needed for Missiles and Planes. Buying One Can Take Years

https://www.nytimes.com/2026/09/26/business/ball-screws-military-production.html
2•cainxinth•47m ago•0 comments

A Slice of Europe in the Heart of Lucknow – Oranje Castle

1•oranjecastle•47m ago•0 comments

Tuning a Server for Benchmarking

https://david.alvarezrosa.com/posts/tuning-a-server-for-benchmarking/
4•dalvrosa•49m ago•2 comments

Is the AI Bubble About to Be Tested?

https://www.youtube.com/watch?v=T-oXyXwD6sE
2•Betelbuddy•51m ago•0 comments

Every Package Is Installed

https://fzakaria.com/2026/09/24/every-package-is-already-installed
2•birdculture•57m ago•0 comments

Restricting AI Agents When No Human Is Watching

https://a16y.ai/blog/securing-ai-agents-when-no-human-is-watching
2•doitmyaiway•59m ago•0 comments

Schoolchildren without smartphones penalised with higher bus fares

https://www.theguardian.com/money/2026/sep/26/schoolchildren-smartphones-higher-bus-fares-england
3•gradschool•1h ago•0 comments