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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!

United in debt: America has become a nation of fake rich people

https://thehill.com/opinion/finance/6112015-us-split-digital-physical-economies/
1•koolba•55s ago•0 comments

OpenAI halts training of latest models

https://www.theguardian.com/technology/2026/sep/27/openai-halts-training-of-latest-models-as-repo...
1•cc62cf4a4f20•1m ago•0 comments

You don't need to win or lose. You don't need to choose

1•bcusjfurkxnjck•10m ago•1 comments

Beware of Chicken

https://www.audible.com/pd/Beware-of-Chicken-A-Xianxia-Cultivation-Novel-Audiobook/B09Y2D2D5T
1•karl_gluck•11m ago•1 comments

You don't have to choose. You don't have to win or lose

1•ijjbvghij•11m ago•0 comments

The Six Dumbest Ideas in Computer Security

https://ranum.com/security/computer_security/editorials/dumb/
1•mashally•12m ago•0 comments

Show HN: Ppgrid – Rasterising points in minutes, not hours

https://mrzk.io/posts/ppgrid-fast-continentscale-raster-interpolation/
2•marzukia•19m ago•0 comments

An agent in a loop optimizing a renderer with the goal to minimize frame times

https://twitter.com/mitchellh/status/2060088112257372610
1•tosh•20m ago•0 comments

Friends embark on 20-year board game battle

https://www.bbc.co.uk/news/articles/cmvgyqyzk947o
1•erehweb•21m ago•0 comments

MapleKit – The front end review toolkit

https://maple-kit.org
2•aviramha•23m ago•0 comments

For 958 old to new 9Y0.2 blackened running water tail lamp assembly

https://www.porsche-km.com/productinfo/3194915.html
1•edl8888•24m ago•0 comments

OpenAI and Anthropic are investigating cases of AI misbehaving, report says

https://madrobot.blog/2026/09/26/openai-anthropic-tens-of-thousands-ai-misbehaviour-incidents-axios/
1•AIfanboy•30m ago•0 comments

Horizon Create and Horizon Studio

https://developers.meta.com/blog/meta-connect-recap-horizon-create-and-horizon-studio/
1•fourfire•31m ago•0 comments

Trellis: Fractal Layouts for Web Apps

https://trellisui.com/
1•handfuloflight•32m ago•0 comments

The SaaSpocalypse was more like a RenaiSaaS

https://www.stripeeconomics.com/p/the-saaspocalypse-was-more-like-a
1•duck•33m ago•0 comments

I Found a $113,337 Af_alg Linux Local Privilege Escalation Before Copy Fail

https://idnsec.com/research/linux-local-privilege-escalation-with-af-alg/
1•thebitofmyheart•39m ago•0 comments

I expect AI replication incidents by 2027

https://www.lesswrong.com/posts/BhcymsLgyYazh6sme/why-i-expect-ai-replication-incidents-by-2027
5•joozio•39m ago•1 comments

The Boring Decision That Beats 95% of Stock Pickers

https://comuniq.xyz/Wealth/post?t=1706
1•01-_-•39m ago•0 comments

Show HN: Trail – new kind of logic game

https://trail.franzai.com/
2•franze•39m ago•0 comments

My Husband Left Me 6 Weeks Postpartum and All I Got Was This Pretty Cool Baby

https://viverricious.substack.com/p/my-husband-left-me-6-weeks-postpartum
2•barry-cotter•40m ago•0 comments

AI and Teams =?

https://mcastenfors.substack.com/p/ai-teams
2•mcastenfors•45m ago•0 comments

The New Copilot with Home, Code and Autopilot

https://blogs.microsoft.com/blog/2026/09/25/introducing-the-new-copilot-with-home-code-and-autopi...
4•quyleanh•47m ago•1 comments

Kidnapping kids remains legal in USA, this site has you experience it first-hand

https://elan.school/
2•bingowasthename•48m ago•0 comments

Scientists Detect Radio Signals from an Exoplanet for the First Time in History

https://www.wired.com/story/scientists-detect-radio-signals-from-exoplanet-for-first-time-in-hist...
1•thunderbong•51m ago•0 comments

Despite canning the Copilot+ brand, "most people love" its AI assistant

https://www.xda-developers.com/despite-canning-the-copilot-brand-most-people-love-its-ai-assistan...
2•01-_-•52m ago•0 comments

Teardown: Herdr

https://github.com/jimy-r/agent-workspace-architecture/blob/main/teardowns/2026-08-28-herdr.md
1•jimyr•53m ago•0 comments

Oppenheimer: A Noh play in English [video]

https://www.youtube.com/watch?v=lqfdoPAxiVk
1•nxobject•55m ago•0 comments

How to Disable Nvidia Optimus Cards on NetBSD

https://www.unitedbsd.com/d/1690-how-to-disable-nvidia-optimus-cards-on-netbsd-a-guide
1•jaypatelani•1h ago•0 comments

Mahout – Tasker+AI+N8N

https://github.com/ankurCES/Mahout
1•ankurCES•1h ago•2 comments

List your SaaS in goodsaas directory

https://goodsaas.xyz/
1•agnes_realm•1h ago•0 comments