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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•9mo 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!

Serve Markdown to LLMs from your Next.js app

https://github.com/kasin-it/next-md-negotiate
1•kasin-it•15m ago•1 comments

Idea Hunting Is Dead. Databases Like This Are Replacing It

1•briebella•17m ago•0 comments

Magawa the HeroRAT

https://en.wikipedia.org/wiki/Magawa
1•KolmogorovComp•19m ago•0 comments

The Lazy Way to Find Your Next SaaS Idea

1•DownCreater•22m ago•1 comments

Pentagon puts Scouts 'on notice' over DEI and girl-centered policies

https://www.npr.org/2026/02/27/nx-s1-5729159/pentagon-scouts-hegseth-dei-deal
1•iamflimflam1•24m ago•0 comments

We Will Be Divided

https://we-are-divided.com
2•shiftybitshiftr•25m ago•0 comments

Social media use/mental wellness links in youth are artifact of other factors [pdf]

https://www.christopherjferguson.com/Brainwaves.pdf
1•mpweiher•29m ago•0 comments

Agentic Engineering Patterns

https://simonwillison.net/guides/agentic-engineering-patterns/
1•vinhnx•34m ago•0 comments

Might Be the Most Underrated Resource for Early Stage Founders

1•vibecoder21•37m ago•0 comments

Kakveda open source-level AI, Infra observability agent

https://www.kakveda.com/
1•prateekdalal•37m ago•1 comments

What Is It That Makes Today's Homes So Different, So Appealing?

https://smarthistory.org/richard-hamilton-just-what-is-it/
1•Torwald•38m ago•0 comments

How LDAP Works

https://growingswe.com/blog/ldap
1•vismit2000•39m ago•0 comments

How you invent math: From counting to complex numbers

https://growingswe.com/blog/inventing-math
1•vismit2000•39m ago•0 comments

Stop Burning Your Context Window – How We Cut MCP Output by 98% in Claude Code

https://mksg.lu/blog/context-mode
1•mksglu•40m ago•1 comments

Zerobyte

https://github.com/nicotsx/zerobyte
1•Erenay09•41m ago•0 comments

Researchers praise 'stunning' results of new prostate cancer treatment

https://www.theguardian.com/society/2026/feb/28/researchers-praise-stunning-results-of-new-prosta...
2•sandebert•42m ago•0 comments

Robotic Land Drone holds positions in Ukraine frontline for 45 days

https://www.youtube.com/watch?v=JMTSH1U44cw
2•lifeisstillgood•48m ago•0 comments

The Missing Piece of AI Discourse Is Trust

https://philipptanlak.com/the-missing-piece-of-ai-discourse-is-trust/
1•philippta•49m ago•0 comments

Modula-2

https://en.wikipedia.org/wiki/Modula-2
3•tosh•52m ago•0 comments

US Customs destroy a rare floppy disk containing demo version of Tsukihime

https://www.timeextension.com/news/2026/02/literally-crying-right-now-50-copies-of-this-adult-onl...
2•FMecha•53m ago•0 comments

ErsatzTV Has Been Archived

https://github.com/ErsatzTV/ErsatzTV/issues/2839
1•kassner•53m ago•0 comments

The Ml.energy Leaderboard

https://ml.energy/leaderboard/
1•kgolubic•55m ago•0 comments

Jeffrey Epstein saw promise in Bitcoin – and its far-right supporters

https://www.theverge.com/tech/885252/jeffrey-epstein-bitcoin-cryptocurrency-connections
1•robtherobber•58m ago•0 comments

Surface-Stable Fractal Dithering

https://runevision.com/tech/dither3d/
1•fanf2•59m ago•0 comments

Show HN: I Turned My CV into a Space Invaders Game (Rust and WASM)

https://breezko.dev
1•breezk0•1h ago•0 comments

Show HN: JobSeek Expat – a CLI tool to scrape English speaking jobs on LinkedIn

https://github.com/electricalgorithm/jobseek-expat
2•gyokhan•1h ago•0 comments

Accuracy vs. Speed in Local LLMs: Finding Your Sweet Spot

https://grigio.org/accuracy-vs-speed-in-local-llms-finding-your-sweet-spot/
1•grigio•1h ago•0 comments

Silent March (2021)

https://tobiaskucera.art/en/tichy-brezen/
1•theobias•1h ago•0 comments

Nano Banana 2 AI Image Generator – Pro Quality, Flash Speed

https://veevid.ai/nano-banana-2
1•jacksteven•1h ago•0 comments

Czinger 21C review: flat out in America's £1.6M, 3D-printed hypercar

https://www.topgear.com/car-reviews/czinger/21c/first-drive
1•teleforce•1h ago•0 comments