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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•11mo 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!

AI agent deletes company's database in seconds

https://www.msn.com/en-us/news/technology/ai-agent-deletes-company-s-entire-database-in-seconds/a...
1•galaxyLogic•2m ago•0 comments

Ask HN: What would you build on bitesize.io?

1•oan•2m ago•0 comments

Universal Linux Password Recovery Tool (Tweet)

https://twitter.com/junorouse/status/2049531916463063049
1•aizk•2m ago•0 comments

Tech Meta's Reality Labs lost over $4B in first quarter

https://www.cnbc.com/2026/04/29/metas-reality-labs-lost-over-4-billion-in-first-quarter.html
1•ZeidJ•3m ago•0 comments

Show HN: Stream iOS Simulators to a Browser Window

https://github.com/EvanBacon/serve-sim
1•EvanBacon•3m ago•0 comments

MiniRAT: A Go-based macOS RAT delivered via malicious NPM package

https://www.iru.com/blog/minirat
1•ZeidJ•3m ago•0 comments

"Young with Experience" Paradox: Einstein's Twin as a Critique of Modern Hiring

https://zenodo.org/records/19898846
1•Serena_Zayn•7m ago•0 comments

Ask HN: Are there any good open-source chat apps?

2•smj-edison•9m ago•0 comments

"Rat Run" Sudoku Series by Marty Sears

https://logic-masters.de/Raetselportal/Raetsel/zeigen.php?chlang=en&id=000IFI
1•codechicago277•14m ago•0 comments

How dating app algorithms (likely) work in 2026

https://nsokolsky.substack.com/p/how-dating-app-algorithms-likely
1•paulpauper•16m ago•0 comments

The Copernican Model Was More Simple

https://jonasanksher.substack.com/p/the-copernican-model-actually-was
1•paulpauper•16m ago•0 comments

Most Swiss back initiative to cap population at 10M

https://www.reuters.com/world/europe/most-swiss-back-initiative-cap-population-10-million-poll-sh...
1•baal80spam•16m ago•0 comments

Show HN: Claude Code Web UI

https://github.com/alexjbarnes/cockpit
1•recouptreadmill•16m ago•0 comments

Hi, looking for Tester for my TD game

https://testflight.apple.com/join/unh5x9Vh
3•pompeii•19m ago•1 comments

US accuses China of industrial-scale AI model distillation, will share Intel

https://thenextweb.com/news/us-white-house-ai-model-distillation-china-theft
5•gmays•21m ago•2 comments

MCP server that lets agents get human opinions in real-time

https://github.com/impel-intelligence/datapoint-mcp
1•chancemehmu•22m ago•0 comments

'Metajets' could allow future spaceships to be propelled by nothing but light

https://newatlas.com/space-systems/metajets-light-propelled-spaceships/
1•breve•23m ago•0 comments

I benchmarked Claude Code's caveman plugin against "be brief."

https://www.maxtaylor.me/articles/i-benchmarked-caveman-against-two-words
1•max-t-dev•25m ago•0 comments

SYNQ – Give ChatGPT and Claude permanent, local memory

1•Tamatarr•26m ago•0 comments

Agent-Augmented Meetings (2003)

https://link.springer.com/chapter/10.1007/978-1-4419-9200-0_2
2•thatxliner•27m ago•0 comments

Ask HN: Are you OK with DeepSeek and other labs reading your data?

1•davidbjaffe•28m ago•0 comments

First USMC MQ-58 Valkyrie CCA Drones to Arrive in 2029

https://www.twz.com/air/first-usmc-mq-58-valkyrie-cca-drones-to-arrive-in-2029
2•breve•28m ago•0 comments

Why everyone is quietly quitting OpenClaw [video]

https://www.youtube.com/watch?v=urAMvpPhtqo
1•nvahalik•28m ago•0 comments

China Is America's Military Equal Now and in Future Fights, Marine General Warns

https://www.twz.com/sea/china-is-americas-military-equal-now-and-in-any-future-fight-marine-gener...
4•breve•31m ago•0 comments

Mac Studio: Anything > 96GB of RAM Is Unavailable

https://tapbots.social/@paul/116489066337152245
1•doener•31m ago•0 comments

I accidentally made law enforcement shut down their fake honeypot

https://lina.sh/blog/ddos-honeypot
5•fishgoesblub•33m ago•0 comments

Show HN: Free tool to verify legal citations

https://secondseat.ai/verify
1•gabelev•33m ago•0 comments

Stock trading: focus on value, not price

https://smartmoneyguides.quora.com/
1•hennix22•34m ago•0 comments

Trading Agents – Multi-Agent LLM Financial Trading Network

https://github.com/TauricResearch/TradingAgents
1•rmason•35m ago•0 comments

The Angine de Poitrine Argument for UBI

https://www.scottsantens.com/the-angine-de-poitrine-argument-for-ubi/
1•doener•40m ago•0 comments