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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!

Claude Code Field Kit: a tested safety hook and lean Claude.md templates

https://github.com/OactoDev/claude-code-field-kit
1•ninetyquid•30s ago•0 comments

Show HN: I built a free App Store screenshot editor with posable 3D devices

https://ultrashot.io/
1•elliotekj•2m ago•1 comments

The creator of Jujutsu has joined ERSC

https://ersc.io/blog/martin-joins-ersc
3•steveklabnik•4m ago•0 comments

Once Globally Preeminent, U.S. Universities Are Sliding into Decline

https://washingtonmonthly.com/2026/08/17/us-higher-education-decline-chinese-universities/
2•DemiGuru•5m ago•0 comments

Show HN: Three Pins a daily 3-hole golf game in the browser

https://threepins.golf/
1•colin_rightwork•5m ago•0 comments

AI admissions navigator for students in Central Asia

https://www.lumifield.app
1•Aarnur•5m ago•1 comments

Show HN: Rust Glancer 0.2 – new Rust LSP server targeting <100mb idle RSS

https://rust-glancer.github.io/blog/0-2-0/
1•popzxc•6m ago•0 comments

Empty intervals are valid intervals

https://nigeltao.github.io/blog/2025/empty-intervals.html
1•fanf2•8m ago•0 comments

Bitcoin 101 Classroom

https://classroom.google.com/c/ODc2ODU0NDI5MTY1/m/ODc2ODUzMzg4MTI5/details
1•JustReaper•8m ago•0 comments

Show HN: Semantic Overlays – an NX bit for LLM prompt injection (live demo)

https://semantic-overlays.vercel.app/
1•joshua_s_penman•10m ago•0 comments

China's installed solar power capacity surpasses coal power for the first time

https://www.globaltimes.cn/page/202609/1369526.shtml
2•giuliomagnifico•12m ago•0 comments

Stopping the Unstoppable: When an unstoppable force meets a dashpot snubber

https://practical.engineering/blog/2026/9/1/stopping-the-unstoppable
1•crescit_eundo•12m ago•0 comments

New Zero-Cal Sugar Is 3,500 Times Sweeter Than Sucrose,but Doesn't Spike Insulin

https://www.sciencealert.com/this-new-zero-cal-sugar-is-3500-times-sweeter-than-sucrose-but-doesn...
1•ivewonyoung•12m ago•0 comments

PureTube: No ads on YouTube

2•wariya•12m ago•0 comments

Circuit Loop Theory: a mathematical formalism for electromagnetic boundaries

https://github.com/obinexus/circuit_loop_theory/blob/main/CLP_CLA_Mathematical_Formalism.md
1•obinexus•14m ago•0 comments

Atlas: A World Model for Spatial Intelligence

https://www.worldlabs.ai/blog/atlas
31•johnsutor•14m ago•0 comments

Patent-pending live company intelligence for AI agents

https://www.bytemine.ai/blog/temporal-company-intelligence-gtm-agents
1•kokoz•15m ago•0 comments

Launch HN: Nori Robotics (YC S26) – A low-cost humanoid robot for development

https://www.norirobotics.com/
8•AntonioLi•15m ago•0 comments

The model picker is a dead end

https://lovable.dev/blog/the-model-picker-is-a-dead-end
1•tosh•15m ago•1 comments

July in Servo: more platforms, faster canvas, web fonts in SVG, and more

https://servo.org/blog/2026/08/31/july-in-servo/
1•birdculture•15m ago•0 comments

Dark Fiber–An Archaeology of the Dot-Com Bubble (2025)

https://www.technostatecraft.com/p/dark-fiberan-archaeology-of-the-dot
1•mkl95•16m ago•0 comments

Nicholas Decker in Hell

https://www.astralcodexten.com/p/nicholas-decker-in-hell
1•paulpauper•17m ago•0 comments

Did Europeans Get Fat from Neandertals?

https://www.science.org/content/article/did-europeans-get-fat-neandertals
1•paulpauper•18m ago•0 comments

Cloud Imperium Cash Shop Records $8.5M in Sales in August 2026

https://nosygamer.blogspot.com/2026/09/cloud-imperium-cash-shop-records-85.html
1•speckx•19m ago•0 comments

Timelapse of the Future: A Journey to the End of Time [video]

https://www.youtube.com/watch?v=uD4izuDMUQA
1•gurjeet•20m ago•0 comments

John Ternus Replaces Tim Cook as Apple CEO

https://www.nytimes.com/2026/09/01/technology/apple-tim-cook-john-ternus.html
3•FinnLobsien•21m ago•0 comments

Show HN: Sift, an iOS app that auto-detects recipes in Safari and stores them

https://siftapp.me/
1•mthomaswicher•22m ago•0 comments

The Light Herder: 4K Analog Video Feedback Device

https://www.thelightherder.com/
1•glitcher•22m ago•0 comments

Leaked Files Reveal How Russia Trains Hackers for Military Cyber Operations

https://gbhackers.com/leaked-university-files/
4•speckx•23m ago•0 comments

Agentic Video in Gemini

https://blog.google/innovation-and-ai/models-and-research/gemini-models/introducing-agentic-video...
2•ilreb•25m ago•0 comments