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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!

Google Engineer Charged with Insider Trading on Polymarket

https://finance.yahoo.com/markets/crypto/articles/google-engineer-charged-insider-trading-2109041...
1•1vuio0pswjnm7•37s ago•0 comments

What it would take to rebuild U.S. manufacturing might

https://www.axios.com/2026/05/27/us-manufacturing-china-imports
2•petethomas•1m ago•0 comments

Human in the loop and the autonomous agent problem

https://openenvelope.org/writing/hitl-autonomous-agent-problem/
1•ashconway•2m ago•0 comments

Smartphone Sales Are Tumbling

https://www.msn.com/en-us/news/technology/ar-AA24cVZL
2•CarbonBasedUnit•4m ago•1 comments

South America Travel Costs in 2026: Which Cities Are Cheap Now

https://jackmaguire.org/blog/south-america-travel-costs-2026/
2•magicroot75•8m ago•1 comments

Google Security Engineer Arrested in Million-Dollar Polymarket Trading Scheme

https://www.wired.com/story/google-employee-accused-of-polymarket-one-million/
1•1vuio0pswjnm7•10m ago•0 comments

Google Employee Charged with Insider Trading

https://www.justice.gov/usao-sdny/pr/google-employee-charged-insider-trading
3•1vuio0pswjnm7•11m ago•0 comments

Show HN: SwiperTab – clean up your tabs in a fun way

https://addons.mozilla.org/en-US/firefox/addon/swipertab/
2•Realman78•11m ago•0 comments

AgingBench: AI Agents Age Too

https://agingbench.github.io
2•zfancy•11m ago•0 comments

Severe Latency Impacting All Slack Services

https://slack-status.com/2026-05/fd9a431182c72eeb
4•xyru•13m ago•1 comments

Trump admin drawing up plans to stop processing intl flights in sanctuary cities

https://www.theguardian.com/us-news/2026/may/27/dhs-international-flights-sanctuary-cities
4•standardUser•16m ago•0 comments

New method for testing AI using real work-flows

https://github.com/AssimilatedHuman/LLM-Inquisitor
1•ballista2026•17m ago•0 comments

Show HN: My Attempt at QR as a Captcha

https://qr.arcades.click
1•jwally•22m ago•0 comments

Ask HN: I am about to go from SWE to Product Manager, what is your day 1 advice?

1•mr_00ff00•25m ago•2 comments

A Luxury Survivalist Community Is Tearing Itself Apart

https://www.wsj.com/us-news/a-luxury-survivalist-community-is-tearing-itself-apart-53d2a99f
1•tortilla•26m ago•2 comments

Why is Slack allowed to get away with lying?

5•slack_is_lying•30m ago•1 comments

AGH is the First open-network protocol for AI Agents

https://www.agh.network/
1•pedronauck21•30m ago•1 comments

How can we get politicians to listen? Surely there's a tech solution: Voice News

https://voicenews.app
1•henrystaley•31m ago•3 comments

Rise and Fall of Hosting Provider Gandi.net

https://gagliardoni.net/#20260528_gandi_downfall
2•tomgag•32m ago•2 comments

Google Engineer Charged with Insider Trading on Polymarket

https://www.bloomberg.com/news/articles/2026-05-27/google-engineer-charged-with-insider-trading-o...
9•forthwall•34m ago•1 comments

Charter Communications confirms data breach of apparently 40M records

https://www.techradar.com/pro/security/charter-communications-confirms-data-breach-shinyhunters-b...
2•lschueller•35m ago•0 comments

Wikipedia: Wiki Workers United Solidarity

https://en.wikipedia.org/wiki/Wikipedia:Wiki_Workers_United_solidarity
3•choult•35m ago•0 comments

I built three Wikipedia-based search tools as alternatives to Google AI

https://www.calishat.com/2026/05/21/three-search-alternatives-to-googles-brave-new-ai-world/
1•Calishat•37m ago•1 comments

NASA's Psyche Mission Aces Mars Flyby, Targets Metal-Rich Asteroid

https://www.nasa.gov/missions/psyche-mission/nasas-psyche-mission-aces-mars-flyby-targets-metal-r...
1•bookofjoe•37m ago•0 comments

Interesting possible new Tinder scam at scale

https://www.youtube.com/watch?v=rjxAYdUe8uU
1•lifeisstillgood•38m ago•0 comments

What Emerges When You Don't Break Sustained Coherent Human-AI Interaction

https://zenodo.org/records/20332884
1•Depiphany_Reb•40m ago•0 comments

Taking Naval Options Away from China –| Peter Zeihan [video][4m53s]

https://www.youtube.com/watch?v=NRkZprxYOzQ
1•Bender•41m ago•0 comments

China is keeping its best AI talent to itself via travel restrictions

https://techcrunch.com/2026/05/27/china-is-increasingly-keeping-its-best-ai-talent-to-itself/
1•jnord•41m ago•0 comments

A Google employee allegedly used inside information to win $1.2M on Polymarket

https://www.theverge.com/tech/938635/google-polymarket-insider-trading-prediction-market-bets
4•1vuio0pswjnm7•41m ago•0 comments

Halide Mark III

https://www.lux.camera/halide-mark-iii/
2•witweb•43m ago•0 comments