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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!

The Breaks – A Breaking Encyclopedia

https://thebreaks.org/index.html
1•bryanrasmussen•1m ago•0 comments

Mom-as-a-Service

https://www.momasaservice.com/
1•edest28build•4m ago•1 comments

PowerContext, Context for work that humans and agents hand off and continue

https://github.com/oceanbase/powercontext
1•jinqueeny•10m ago•0 comments

Microsoft AI Publishes Its Humanist AI Code of Conduct

https://microsoft.ai/code-of-conduct/
1•CoderLim110•10m ago•0 comments

Volkswagen Mission Efficiency Sets 3 World Records

https://autoindiadaily.in/car-news/volkswagen-mission-efficiency-revealed/
1•snikolaev•12m ago•1 comments

XProtect behavioral flop: the Golden Gasp

https://melomac.com/posts/xprotect-behavioral-flop-the-golden-gasp/
1•lladnar•13m ago•0 comments

Show HN: Daemon OS – An intelligence layer for infrastructure

https://daemon-os.lebarionellison.workers.dev
1•lellison1•20m ago•0 comments

We are all Product Engineers now

https://seldo.com/posts/we-are-all-product-engineers-now/
4•vinhnx•20m ago•0 comments

The Hardness of 4-to-1 Games with Perfect Completeness

https://eccc.weizmann.ac.il/report/2026/179/
1•momeara•21m ago•0 comments

Purely Functional Operating Systems

https://eighty-twenty.org/2022/06/23/henderson-functional-operating-systems-1982
1•vinhnx•21m ago•0 comments

DeepMind's new genome 'atlas' charts effects of all 9B human gene mutations

https://www.nature.com/articles/d41586-026-02835-4
1•jonbaer•22m ago•0 comments

METR Anthropic Network

https://twitter.com/kevinnbass/status/2099621874279817638
3•andrewljohnson•22m ago•0 comments

One Pass to Parse Them All: Fused Parallel CSV Processing [pdf]

https://www.vldb.org/pvldb/vol19/p3579-ellmann.pdf
1•cpard•23m ago•0 comments

India's Dedicated Freight Corridor's last mile challenge

https://finshots.in/archive/the-dedicated-freight-corridors-last-mile-challenge/
1•vismit2000•35m ago•0 comments

Mouse

https://github.com/mousedev/mouse-harness/tree/main
2•Aeroi•35m ago•0 comments

CrofAI Is an OpenRouter Wrapper

https://kendell.dev/blog/crofaifalse/
1•wut42•37m ago•0 comments

Internet Guestbooks: The Rise, Decline, and Afterlife

https://curiouxify.com/internet-guestbooks/
1•mastazi•37m ago•0 comments

An open-source interactive 3D PC Anatomy explore what's inside a computer

https://pc-anatomy.vercel.app/
1•Zeruxe•37m ago•1 comments

Does Scaling Web-Video Pre-Training Help Real Robots Do Real Work?

https://www.rhoda.ai/research/scaling-web-video-pretraining
2•gmays•38m ago•0 comments

The Physical Agent Harness: a portable interface to persistent agents

https://rashidazarang.com/c/the-physical-agent-harness
2•rashidae•40m ago•0 comments

Air Force secretary acknowledges the US has weapons in space

https://abcnews.com/Politics/air-force-secretary-acknowledges-us-weapons-space/story?id=136437923
2•SanjayMehta•41m ago•0 comments

World AI Cooperation Organization

https://en.wikipedia.org/wiki/World_Artificial_Intelligence_Cooperation_Organization
1•soundworlds•41m ago•1 comments

Show HN: Day week calendar app inspired by the French Revolutionary calendar

https://github.com/OlegIGalkin/tendayweekcalendar
1•cantouch•44m ago•0 comments

US-China AI strategic planning

https://sinocism.com/p/us-china-strategic-ai-dialogue-said
2•neptunetriton•45m ago•0 comments

The harms of short-form video on the brain are starting to show

https://www.theguardian.com/commentisfree/2026/sep/14/zuckerberg-short-form-video-cognitive-harm
2•pizzaiolo•53m ago•0 comments

I worked at Google DeepMind. You should listen to the warnings about AI

https://www.theguardian.com/technology/2026/sep/14/google-deepmind-ai-warnings
5•gibspaulding•53m ago•0 comments

The Rise of the Forward Deployed Engineer – and How to Do the Job Right

https://www.latent.space/p/forward-deployed-engineer-best-practices
1•yarapavan•56m ago•0 comments

Exploring mathematics with your computer (1993)

https://archive.org/details/exploringmathema0000enge
1•vismit2000•57m ago•0 comments

Why is nobody signing up even though I launched an unlimited plan on my website?

2•petebay•58m ago•2 comments

Efficient capital allocation in media as it relates to catalog IP

https://sidecar-part-ii.danieldeboulay.com
2•deboulaymxf•1h ago•0 comments