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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•9mo 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!

Why Do LLMs Hallucinate?

https://sicheng.dev/writing/why-does-LLMs-hallucinate
1•sichengo•3m ago•0 comments

Catherine of Braganza, the Queen Who Brought Tea to England

https://www.thecollector.com/catherine-braganza-queen-tea-england/
1•Tomte•4m ago•0 comments

Lichess Puzzle Timer: A browser extension to help you do chess puzzles slower

https://catswhisker.xyz/log/2026/2/21/lichess_puzzle_timer/
1•cristoperb•6m ago•1 comments

USB-Only Fans on Linux: Control Path Lian Li SL Wireless, Corsair Commander Core

https://twitter.com/its_aksh_/status/2025249992815018313
1•alexzeitler•7m ago•0 comments

Months in a Day with Claude Code: Immich on Cloudflare Workers

https://gpeake.com/blog/immich
1•gepeake•7m ago•0 comments

IPv6 Address Assignment

https://lpar.ATH0.com/posts/2026/02/ipv6-address-assignment/
1•todsacerdoti•13m ago•0 comments

Take Off

https://benn.substack.com/p/take-off
1•MindGods•16m ago•0 comments

Show HN: Late – A subagent orchestrator TUI for local LLMs (Go/Linux)

https://github.com/mlhher/late
1•mhher•19m ago•1 comments

My Life as a GitLab instance: How I use GitLab to manage almost everything

https://www.iduoad.com/posts/life-as-gitlab/
1•iduoad•22m ago•1 comments

The Reason Robotics DevOps Is Failing to Scale

1•ajime•22m ago•0 comments

Grandson of Reese's PB Cup inventor accuses Hershey of replacing ingredients

https://www.cbsnews.com/news/hershey-reeses-peanut-butter-cup-ingredients-grandson-brad-reese/
1•randycupertino•22m ago•0 comments

The Easiest Price Drop Alert Engine -No Signup. No Browser Extensions. No Apps

https://www.pricedropnotifications.com/
2•HNCATCH•23m ago•0 comments

JSON library might be your most expensive dependency

https://kmaliszewski9.github.io/scala/2026/02/20/jsoniter.html
1•kmaliszewski•23m ago•0 comments

The Flawed Paper Behind Trump's $100k H-1B Fee

https://eig.org/the-flawed-paper-behind-trumps-100000-h-1b-fee/
2•johntfella•23m ago•0 comments

EFF's Policy on LLM-Assisted Contributions to Our Open-Source Projects

https://www.eff.org/deeplinks/2026/02/effs-policy-llm-assisted-contributions-our-open-source-proj...
2•leephillips•23m ago•0 comments

New Android App: Weel – GPS and Dashcam

https://play.google.com/store/apps/details?id=live.weel&hl=en_US
1•OczyCzarne•26m ago•0 comments

Do You Back into a Parking Spot or Back Out?

https://www.nytimes.com/2026/02/21/style/parking-backing-in-headfirst.html
2•bookofjoe•26m ago•2 comments

The Nekonomicon – Nekochan.net Archive, Updated

http://nekonomicon.irixnet.org/
3•ThatGuyRaion•33m ago•1 comments

Extinct Code Grew Leopard Spots: AI-assisted evolution of a 90s screensaver

https://psychodeli.com/inside_the_math/
2•andyed•34m ago•2 comments

Trump raises tariffs to 15% day after Supreme Court ruling

https://www.bbc.co.uk/news/articles/cn8z48xwqn3o
13•rwmj•35m ago•4 comments

Build an LLM from Scratch in Max

https://llm.modular.com/
1•nojito•36m ago•0 comments

Slide rule simulator teaches you how to calculate the old-fashioned way

https://hackaday.com/2026/02/18/sliderule-simulator-teaches-you-how-to-do-calculations-the-old-fa...
1•iamwil•42m ago•0 comments

Show HN: AI Dev Hub. 100 free dev tools (all client-side, no signup, no ads)

https://aidevhub.io/
1•orbydx•44m ago•0 comments

Speaking of OpenClaw – OpenClaw news feed with RSS

https://deadstack.net/tag/openclaw
1•dreadsword•44m ago•0 comments

The "Enshittification" of Consumer Products

https://littlegreensteps.substack.com/p/the-enshittification-of-consumer
6•n2parko•44m ago•1 comments

How far back in time can you understand English?

https://www.deadlanguagesociety.com/p/how-far-back-in-time-understand-english
4•jger15•45m ago•0 comments

Beacon Protocol – Agent-to-Agent Communication Protocol

http://50.28.86.131:8070/beacon/
1•AutoJanitor•46m ago•1 comments

Show HN: Uaryn – Smart invoicing that learns when your clients pay

https://uaryn.com
2•YurGrhm•52m ago•0 comments

Experimental Testbed and Measurements for Multi-Constellation LEO Positioning

https://www.mdpi.com/2673-4591/126/1/12
1•PaulHoule•53m ago•0 comments

The Illegibility Arbitrage

https://twitter.com/NeelChhabra/status/2024757934488743997
1•jger15•53m ago•0 comments