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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!

Unified Perception Engine: never render more than humans can see (public domain)

https://github.com/warofwar2011-dev/unified-perception-engine
1•Mars2011•3m ago•0 comments

The Enigma of Gertrude Stein

https://www.thenation.com/article/culture/gertrude-stein-afterlife-wade-review/
1•samclemens•11m ago•0 comments

Midnight Captain – A midnight commander inspired file manager

https://github.com/duguyue100/midnight-captain
1•duguyue100•13m ago•1 comments

Hackers meet match: New DNA encryption protects engineered cells from within

https://phys.org/news/2026-04-hackers-dna-encryption-cells.html
1•pseudolus•17m ago•0 comments

High-Level Rust: Getting 80% of the Benefits with 20% of the Pain

https://hamy.xyz/blog/2026-01_high-level-rust
2•maxloh•20m ago•0 comments

Show HN: I benchmarked MCP vs. CLI for browser automation. MCP wins by 25x

https://github.com/HKUDS/CLI-Anything/pull/212
1•Achiyacohen•21m ago•1 comments

"MongoDB is web scale" (Throwback 2010 XtraNormal clip) [video]

https://www.youtube.com/watch?v=b2F-DItXtZs
1•chirau•22m ago•1 comments

Aero and Y2K Webring

https://frutigeraeroarchive.org/aero_webring
1•jack-bodine•23m ago•0 comments

YuanLey YS100-0602T Review a Cheap 8-Port 10GbE Switch

https://www.servethehome.com/yuanley-ys100-0602t-review-a-cheap-8-port-10gbe-switch/
2•teleforce•27m ago•0 comments

Building a Homebrew Computer Like it's 1995 [video]

https://www.youtube.com/watch?v=FVH6_0GlLNc
1•st_goliath•28m ago•0 comments

He Helped Stop Iran from Getting the Bomb

https://www.newyorker.com/magazine/2026/04/06/he-helped-stop-iran-from-getting-the-bomb
2•posthumangr•29m ago•0 comments

USB/IP Project: a general USB device sharing system over IP network

https://usbip.sourceforge.net/
2•ValentineC•30m ago•0 comments

PBS Nova: Terror in Space (1998)

https://www.pbs.org/wgbh/nova/mir/
1•opengrass•33m ago•0 comments

Show HN: I visualized Wasteland as an RTS game

https://gascraft.ai
2•dnewcome•35m ago•0 comments

React-Debug-Updates

https://github.com/pie6k/react-debug-updates
1•handfuloflight•41m ago•0 comments

No Acquittal for Storm Today

https://www.therage.co/roman-storm-acquittal-2/
2•Cider9986•48m ago•0 comments

Hungary 2026 – Chat with 1k AI-simulated voters before the election

https://hungary2026.populon.ai
1•Mert_Predicts•50m ago•0 comments

Hero rat who sniffed out over 100 land mines is honored with giant statue

https://www.washingtonpost.com/lifestyle/2026/04/08/rat-cambodia-statue-land-mines-magawa/
3•paulpauper•54m ago•1 comments

A Brief History of Lab Notebooks

https://www.asimov.press/p/lab-notebooks
6•paulpauper•54m ago•0 comments

Apple Sued by Three YouTube Channels

https://www.macrumors.com/2026/04/06/apple-sued-by-three-youtube-channels/
6•gnabgib•54m ago•3 comments

Forecasting the economic effects of AI

https://forecastingresearch.substack.com/p/forecasting-the-economic-effects-of-ai
2•hhs•55m ago•0 comments

New WHO database helps countries turn health data into better policy

https://www.who.int/europe/news/item/08-04-2026-new-who-database-helps-countries-turn-health-data...
2•gnabgib•56m ago•0 comments

Predict-Rlm: The LLM Runtime That Lets Models Write Their Own Control Flow

https://repo-explainer.com/Trampoline-AI/predict-rlm
1•handfuloflight•57m ago•0 comments

Ask HN: How to have a macOS devcontainer in VS Code?

2•sroussey•58m ago•0 comments

The Exception Butterfly

https://valhovey.github.io/blog/the-exception-butterfly
2•speleo•59m ago•0 comments

Waiting for Postgres 19: Reduced Timing Overhead for EXPLAIN ANALYZE with RDTSC

https://pganalyze.com/blog/5mins-postgres-19-reduced-timing-overhead-explain-analyze
1•lfittl•1h ago•0 comments

1 in 30 – Artemis, Greatness, and Risk

https://1517.substack.com/p/1-in-30-artemis-greatness-and-risk
3•crescit_eundo•1h ago•0 comments

AI will test governments on jobs, training, and public trust

https://www.hoover.org/news/ai-will-test-governments-jobs-training-and-public-trust-hoover-panels...
1•hhs•1h ago•0 comments

Show HN: AMBR.music – Patreon meets TikTok for musicians

https://app.ambr.music/
2•stamc•1h ago•0 comments

Can AI be a 'child of God'? Inside Anthropic's meeting with Christian leaders

https://www.washingtonpost.com/technology/2026/04/11/anthropic-christians-claude-morals/
2•edwardsrobbie•1h ago•0 comments