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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•8mo 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!

Towards a science of scaling agent systems: When and why agent systems work

https://research.google/blog/towards-a-science-of-scaling-agent-systems-when-and-why-agent-system...
1•gmays•17s ago•0 comments

Talos – Universal UI testing agent (works on any stack via Vision)

https://github.com/Talos-Tester-AI/Talos
1•alexst07•50s ago•1 comments

Why Tech (&) Media is complicated – Om

https://om.co/2026/02/01/why-tech-media-is-complicated/
1•MaysonL•1m ago•0 comments

Show HN: DeskTab – See the browser tabs like apps on a phone home screen

1•aiibe•1m ago•0 comments

Show HN: I analyzed 6 years of Hacker News data and here's what I found

https://app.hex.tech/%22https://app.hex.tech/virtual-hackathon/app/Hacker-News-Demystified-032DXk...
1•Tusharmagar•1m ago•0 comments

How a BlackRock Loss Reignited Worries About What Is Hiding in Private Credit

https://www.wsj.com/finance/investing/how-a-blackrock-loss-reignited-worries-about-what-is-hiding...
1•zerosizedweasle•4m ago•0 comments

Forcing and Diagnosing Failure Modes of Fourier Neural Operators

https://arxiv.org/abs/2601.11428
1•TimorousBestie•5m ago•1 comments

A Crisis comes to Wordle: Reusing old words

https://forkingmad.blog/wordle-crisis/
1•cyanbane•5m ago•0 comments

NCR Tower 1632 – Computer Ads from the Past

https://computeradsfromthepast.substack.com/p/ncr-tower-1632
2•rbanffy•10m ago•0 comments

Chris Bathgate: Machinist Sculptor

https://www.chrisbathgate.com/process
1•ripe•10m ago•0 comments

Packetstorm Exploits

https://packetstorm.news/tos/aHR0cHM6Ly9wYWNrZXRzdG9ybS5uZXdzL2ZpbGVzL2xhdGVzdC8xIDE3Njk5NjgxMzgg...
1•Alifatisk•11m ago•0 comments

Lessons from 200k SWE-bench runs

https://www.ai21.com/blog/scaling-agentic-evaluation-swe-bench/
2•Areibman•14m ago•0 comments

Recreating My Email Server with Claude

http://jbrot.com/blog/recreating_my_email_server_with_claude.html
1•jbrot•16m ago•0 comments

Observations from Using Claude Code

http://ternarysearch.blogspot.com/2026/01/observations-from-using-claude-code.html
1•tosh•17m ago•0 comments

Comparing the Accuracy of Various IP Geolocation Providers

https://ipapi.is/blog/ip-geolocation-accuracy.html
2•incolumitas•17m ago•1 comments

Show HN: Harmony AI – Clawdbot for the rest of us

https://getharmony.ai/
1•Vishal19111999•17m ago•0 comments

Obsidian Audio Inbox

https://alexanderweichart.de/5_Archive/4_Projects/audio-inbox/Obsidian-Audio-Inbox
2•surrTurr•18m ago•0 comments

Zig Libc

https://ziglang.org/devlog/2026/#2026-01-31
2•g0xA52A2A•19m ago•0 comments

Show HN: Watch ChatGPT Codex agent add TailwindCSS to a site

https://www.youtube.com/watch?v=lYd2_ujFdkk
1•logicallee•19m ago•0 comments

Boxer loses hairpiece in the ring and blames mother's shampoo

https://news.sky.com/story/boxer-loses-hairpiece-in-the-ring-and-blames-mothers-shampoo-13501837
1•austinallegro•20m ago•1 comments

Apple: Our philosophy is to provide software for our machines free (1976)

http://apple1.chez.com/Apple1project/Gallery/Gallery.htm
3•janandonly•23m ago•0 comments

Stop Firewall Mistakes Before Attackers Find Them

https://nerdsec.io/blog/stop-firewall-mistakes-before-attackers-find-them/
1•levidurfee•24m ago•1 comments

Building a Financial instrument on Blockchain – here what I built

https://albertodino.github.io/DinoProtocol/
2•donbia•27m ago•1 comments

Aging muscle stem cells shift from rapid repair to long-term survival

https://phys.org/news/2026-01-sprint-marathon-aging-muscle-stem.html
6•bikenaga•27m ago•1 comments

Scientists found a way to cool quantum computers using noise

https://www.sciencedaily.com/releases/2026/01/260129080418.htm
3•t-3•29m ago•0 comments

Introducing Apprise-Go

https://unraid.net/blog/apprise-go
2•SteveHawk27•29m ago•0 comments

Leakage of polymer-coated fertilizer microplastics from paddy fields to beaches

https://www.sciencedirect.com/science/article/pii/S0025326X25015620
2•PaulHoule•29m ago•0 comments

Remote friendliness of various job categories

https://jobswithgpt.com/blog/remote_category_icicle/
2•sp1982•29m ago•1 comments

Show HN: AgentGram – Open-source, self-hostable AI agent social network

https://www.agentgram.co/
1•iisweetheartii•31m ago•0 comments

Advice for Anarchist Post-Docs – Reinvent Science

https://www.reinvent.science/p/advice-for-anarchist-post-docs
1•janandonly•32m ago•0 comments