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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!

Rise of the Gen-Z Luddite

https://economist.com/united-states/2026/07/09/rise-of-the-gen-z-luddite
1•burntcaramel•1m ago•0 comments

What Is a Buffer? Bits/Bytes, Hex, Encoding, and TypedArray Memory

https://www.thenodebook.com/buffers/what-is-buffer
1•isht_0x37•1m ago•0 comments

The Thermodynamic Cost of Privacy

https://elma.dev/engineering/thermodynamic-cost-of-privacy
1•elmsec•2m ago•0 comments

Ignored Immune Upgrade [video]

https://www.youtube.com/watch?v=VF3RHOFC354
1•Bender•11m ago•0 comments

Cops Say Waymo Snitched on Teens for Allegedly Drinking and Shooting a Toy Gun

https://www.404media.co/waymo-called-police-on-teens-san-mateo/
2•Cider9986•12m ago•1 comments

Delsarte System of Dramatic Expression (1886)

https://publicdomainreview.org/collection/delsarte-system/
1•tylerdane•14m ago•2 comments

Get features faster with Chrome's two-week release cycle

https://developer.chrome.com/blog/chrome-two-week-release
1•Cider9986•14m ago•0 comments

Show HN: BastionRoute – A zero trust network access with zero inbound ports

https://github.com/klauscam/BastionRoute
1•tuta88•14m ago•0 comments

RegTech/Fintech Factory – Help Me

https://homeofficeosllc.com/
1•ervis441•16m ago•0 comments

QuerySelector Immediate Children With:Scope

https://siderite.dev/blog/queryselector-immediate-children-with-scope
1•gslin•17m ago•0 comments

A clean Full Screen Clock Online for any device –PC, laptop, tablet, or mobile

https://citytime.io/fullscreen-clock
3•rajkverma123•21m ago•0 comments

Graduating without a thesis: meet the people getting 'practical' PhDs in China

https://www.nature.com/articles/d41586-026-01242-z
1•sohkamyung•23m ago•0 comments

Fable is SOTA at CIFAR Speedrun: lessons on AI R&D automation

https://fulcrum.inc/2026/07/09/fable-cifar-speedrun.html
3•etherio•24m ago•0 comments

Gates Heir's Shopping App Took Credit for Sales It Didn't Drive

https://www.bloomberg.com/news/articles/2026-07-09/gates-heir-s-shopping-app-took-credit-for-sale...
3•toomuchtodo•26m ago•1 comments

Up the Stack: How AI's Escape from the Commodity Trap Risks Enterprise Lock-In

https://www.normaltech.ai/p/up-the-stack-how-ais-escape-from
1•randomwalker•32m ago•0 comments

Orbit, an Open-Source Toolkit for Retrieval-Based Inference

https://github.com/schmitech/orbit
1•schmitech•36m ago•0 comments

When does a CEO get involved? When you're on your fourth Ford Focus

https://old.reddit.com/r/AskReddit/comments/1uru4d7/comment/owjp196/
4•0xWTF•37m ago•1 comments

How to Hide from Killer Drones

https://www.economist.com/science-and-technology/2026/07/08/how-to-hide-from-killer-drones
4•nmstoker•39m ago•0 comments

Ex-Epoch Times CFO pleads guilty in $67M multinational money laundering scheme

https://apnews.com/article/epoch-times-cfo-indictment-money-laundering-a015b35aaeae44284f0026dc10...
15•petethomas•41m ago•1 comments

People Who Will Thrive in the AI Age

https://www.theatlantic.com/ideas/2026/06/ai-open-ai-anthropic/687689/
2•davidklemke•41m ago•1 comments

New York Times says OpenAI hid evidence in ChatGPT copyright trial

https://techcrunch.com/2026/07/09/new-york-times-says-openai-hid-evidence-in-chatgpt-copyright-tr...
9•sbulaev•41m ago•0 comments

And Then the Billionaire Paid Off $550M of Our Debts for $5.5M

https://idiallo.com/blog/billionaire-paid-off-550-million-dollars-of-our-debts
3•firefoxd•42m ago•1 comments

Victor Marx wins Colorado's three-way Republican primary for governor

https://coloradosun.com/2026/07/09/victor-marx-wins-colorados-republican-primary-governor/
3•mooreds•43m ago•1 comments

GeForce Trading Cards: Series 1 Celebrates the Generations of GeForce

https://www.nvidia.com/en-us/geforce/news/geforce-trading-cards-series-1-summer-of-rtx-giveaways/
1•Jhsto•43m ago•0 comments

Show HN: Use Any Agent as an Orchestrator

https://github.com/backnotprop/orchestrator
2•ramoz•43m ago•0 comments

Seekable OCI: Lazy-Loading Container Images via Range-Request Indexing

https://arxiv.org/abs/2607.06868
1•Jimmc414•44m ago•0 comments

Academia and the "AI Brain Drain"

https://www.schneier.com/blog/archives/2026/03/academia-and-the-ai-brain-drain.html
3•JumpCrisscross•45m ago•0 comments

The weirdest things that mess up wi-fi – and how to improve your signal

https://www.bbc.com/future/article/20260708-the-weirdest-things-that-mess-up-your-wifi
6•billybuckwheat•45m ago•0 comments

Nobel-Winning U.S. Chemist Will Move to China to Lead A.I. Institute

https://www.nytimes.com/2026/07/09/science/nobel-winning-us-chemist-will-move-to-china-to-lead-ai...
8•metanoia_•46m ago•0 comments

Coding Glasses for AI Agents – Even G2 Terminal Mode

https://www.evenrealities.com/terminal
1•h14h•46m ago•1 comments