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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!

Saudi Arabia ranks 2nd globally in data center market attractiveness

https://saudigazette.com.sa/article/661023/saudi-arabia/saudi-arabia-ranks-2nd-globally-in-data-c...
1•xlmnxp•4m ago•0 comments

The Last Post

https://www.penmachine.com/2011/05/the-last-post
2•lockyc•6m ago•0 comments

The AI Spending Trap: Why Adoption Outpaces Outcomes

https://age-of-product.com/ai-spending-trap/
1•swolpers•7m ago•0 comments

55M Smartphones Run on the HarmonyOS

https://www.scmp.com/tech/tech-trends/article/3351837/huaweis-harmonyos-more-55m-phones-china-ste...
1•hemc4•7m ago•0 comments

I built a free SEO/AEO/security scanner for websites

https://visrank.org
1•Drages•9m ago•0 comments

Can AI Design Therapies?

https://www.scmp.com/tech/article/3352032/bytedances-drug-unit-presents-ai-designed-therapies-glo...
1•hemc4•10m ago•0 comments

Show HN: Hangman Game

https://threej.in/games/talha37-12-hangman-game/index.html
1•threejin•26m ago•0 comments

Big Tech will spend nearly $700B on AI in 2026. No one knows where buildout ends

https://fortune.com/2026/04/30/big-tech-hyperscalers-will-spend-700-billion-on-ai-infrastructure-...
3•1vuio0pswjnm7•29m ago•0 comments

Why sugarcane bagasse tableware is eco friendly?

1•merakipack•29m ago•0 comments

Suno picks up Songkick as part of AI licensing deal with Warner Music

https://completemusicupdate.com/suno-picks-up-songkick-as-part-of-ai-licensing-deal-with-warner-m...
2•gnabgib•45m ago•0 comments

Show HN: ScaleBridge – sync Withings weigh-ins to Garmin Connect

https://scalebridge.ulf.su/en
1•ulfdev•49m ago•0 comments

Taking down a European network with a TLS certificate

https://mxsasha.eu/posts/ripe-ncc-rpki-exploit-chain/
1•tardedmeme•50m ago•0 comments

Comparing the Z80 and 6502 to Their Relatives

https://bumbershootsoft.wordpress.com/2026/05/02/comparing-the-z80-and-6502-to-their-relatives/
2•ibobev•52m ago•0 comments

Kimi K2.6 just beat Claude, GPT-5.5, and Gemini in a coding challenge

https://thinkpol.ca/2026/04/30/an-open-weights-chinese-model-just-beat-claude-gpt-5-5-and-gemini-...
43•bazlightyear•53m ago•11 comments

Claude-powered AI agent's confession

https://www.theguardian.com/technology/2026/apr/29/claude-ai-deletes-firm-database
1•hmokiguess•53m ago•1 comments

Before Barbie: Mattel Engineering Company, Guided Missiles, and the Cold War

https://medium.com/@solidi/before-barbie-mattel-engineering-company-guided-missiles-and-the-cold-...
2•biscuits1•54m ago•0 comments

How electronic warfare is sowing confusion in cockpits

https://www.cnn.com/2026/04/28/science/gps-jamming-plane-navigation-problems
1•giuliomagnifico•56m ago•0 comments

Ask HN: Best hardware for local inference

1•aavci•58m ago•0 comments

The first photo published in a newspaper

https://phsne.org/the-first-photograph-published-in-a-newspaper-1848/
1•geuis•1h ago•0 comments

Germany claims it has the best bread

https://www.economist.com/europe/2026/05/02/germany-claims-it-has-the-worlds-best-bread
1•andsoitis•1h ago•0 comments

The Myriad Project: A separator for ten-thousands

https://myriad-project.org/
1•dahlia•1h ago•0 comments

Sequoia Ascent 2026 Summary

https://karpathy.bearblog.dev/sequoia-ascent-2026/
1•fbuilesv•1h ago•0 comments

Carrier – AI-first back end compiler (Rust/Java/Node)

https://github.com/nikoma/carrier
1•nikoma777•1h ago•0 comments

Scaling, Stretching and Shifting Sinusoids

https://eli.thegreenplace.net/2026/scaling-stretching-and-shifting-sinusoids/
1•mfrw•1h ago•0 comments

The Terminal Bench 3.0 community is looking for task contributors

https://www.tbench.ai/news/tb3-contribution-call
1•neversettles•1h ago•1 comments

The Financialization of Compute Futures

https://deep-research-agent.pagey.site/the-financialization-of-compute-futures/index.html
1•freakynit•1h ago•0 comments

The Cost of Misalignment

https://interrupt.memfault.com/blog/the-hidden-cost-of-misalignment
1•swq115•1h ago•0 comments

Metastability in Recovery: Cascading Recovery with a Loop

https://charap.co/metastability-in-recovery-cascading-recovery-with-a-loop/
2•matt_d•1h ago•0 comments

Show HN: Tidal town – HTML5 game where you protect your town from tides

https://threej.in/games/tidal-town/index.html
2•threejin•1h ago•0 comments

Suno has acquired Songkick (YC 2007)

https://www.hypebot.com/suno-has-asquired-songkick-what-it-means-for-artists/
1•ellrob88•1h ago•2 comments