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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!

Chrome 153 ships camera and microphone HTML elements

https://webiterate.dev/capability-elements-camera-126/
1•twapi•1m ago•0 comments

Show HN: AI Stack Selector Tool

https://augmentorlabs.com/manifest
1•rohit0x04•4m ago•0 comments

Gradient.dog

https://gradient.dog
1•jobsstevesux•6m ago•0 comments

Pisa Scores by Country 2026

https://worldpopulationreview.com/country-rankings/pisa-scores-by-country
2•wslh•6m ago•0 comments

Cake Wallet has a wallet-draining bug

https://github.com/cake-tech/cake_wallet/issues/3606
2•lostxmr•10m ago•1 comments

Global warning about children's knowledge

https://www.lemonde.fr/en/opinion/article/2026/09/08/global-warning-about-children-s-knowledge_67...
1•geox•11m ago•0 comments

An Emacs-style visual undo tree for Pi session branching

https://github.com/ergenekonyigit/pi-undo-tree
1•ergenekonyigit•12m ago•1 comments

CA tool to encourage low-income rentals may suppress new apartment construction

https://calmatters.org/commentary/2026/08/inclusionary-zoning-housing-suppress-construction/
1•littlexsparkee•14m ago•0 comments

Show HN: MacTap, use knocks on your MacBook as shortcuts

https://mactap.vercel.app/
1•jaskirat16•14m ago•0 comments

Superlogical remote sessions pre-alpha demo [video]

https://www.youtube.com/watch?v=PdwTjSBW6Y8
2•technosmurf•19m ago•0 comments

More of What? – A game of everyday proportions

https://moreofwhat.com
1•eltokh7•20m ago•0 comments

Benchmarking LLMs' Swarm Intelligence

https://github.com/RUC-GSAI/YuLan-SwarmIntell
1•novia•22m ago•0 comments

Introducing CUDA Rust: Two Tracks for Writing GPU Kernels

https://developer.nvidia.com/blog/introducing-cuda-rust-two-tracks-for-writing-gpu-kernels/
3•ubj•25m ago•0 comments

Insilico's Co-CEO Has Big Hopes That Fibrosis Drug Can Reverse Aging Too

https://www.wsj.com/tech/biotech/insilicos-co-ceo-has-big-hopes-that-fibrosis-drug-can-reverse-ag...
2•gmays•26m ago•1 comments

Chess Cheater Detector: Was this game unusually engine-like?

https://chesscheaterdetector.com/
1•domhudson•26m ago•0 comments

Show HN: Spinifex – 19 releases in, from 3 AWS services to 11

https://mulgadc.com/blog/spinifex-1-19-0-release
5•toddyholiday•26m ago•3 comments

Embedding a bitmap font in your HyperCard stack

https://www.leadedsolder.com/2026/09/08/hypercard-custom-fonts-in-resources.html
2•zdw•26m ago•0 comments

Linux desktop image editor with local AI

https://github.com/cthackers/inpaint
2•cthackers•27m ago•0 comments

Chinese AI Companies Conducting Distillation Campaigns Against U.S. AI Companies [pdf]

https://media.defense.gov/2026/Sep/08/2003992823/-1/-1/1/CSA_CHINA_BASED_AI_COMPANIES_MALICIOUS_D...
3•michaefe•28m ago•2 comments

Harness Engineering Papers Collection

https://academy.dair.ai/papers/collections/harness-engineering
2•omarsar•29m ago•0 comments

SEGA president says there's been a rise in "fans who don't play the games"

https://automaton-media.com/en/news/sega-president-says-theres-been-a-rise-in-fans-who-dont-play-...
2•haunter•29m ago•2 comments

Prompt Injection Through Tool Output Is Two Events (Your Screens Read One)

https://www.armosec.io/blog/untrusted-tool-output-prompt-injection/
1•gmays•30m ago•0 comments

Elizabeth Holmes Documentary Upends Telluride Film Festival

https://www.nytimes.com/2026/09/07/movies/elizabeth-holmes-documentary-nathan-fielder-a24.html
1•colinthompson•31m ago•1 comments

Show HN: Agent on your landing page, in one script tag, with generative UI

https://trimly.demos.guuey.com/?tour=live
1•wanseob•31m ago•0 comments

Mastra Agent Factory

https://mastra.ai/factory
1•BrandiATMuhkuh•33m ago•0 comments

The Psychological Warfare of the Modern Sterile Interior

https://lussoarchive.substack.com/p/the-psychological-warfare-of-the
1•rbanffy•33m ago•0 comments

Ask HN: Are you leveraging Spec-Driven / Spec-Anchored development?

2•locusofself•34m ago•0 comments

Google WeatherNext 3 PoC

https://weather.alen.ro/
1•alentodorov•36m ago•0 comments

PS1 Games with DLSS 5 [video]

https://www.youtube.com/watch?v=-RvEt7eNFWk
1•bpierre•42m ago•0 comments

Teen Reading Slumps to Worst This Century Due to Surge in Screen Time

https://www.usnews.com/news/world/articles/2026-09-08/teen-reading-slumps-to-worst-this-century-d...
1•jnord•43m ago•0 comments