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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•8mo 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!

Brain: The First Computer Virus

https://medium.com/geekculture/brain-the-worlds-first-computer-virus-f3758323d894
1•andsoitis•42s ago•0 comments

Online Play Game Boy Advance Mother 3 (Eng. Translation)

https://www.retrogames.cc/gameboyadvance-games/mother-3-eng.html
1•HiPHInch•1m ago•0 comments

The First PC Virus

https://www.bbc.com/audio/play/w3ct7479
1•andsoitis•2m ago•0 comments

Show HN: Mullion – type-safe LLM context management for TypeScript

https://github.com/mullionlabs/mullion-ts
2•mullion•3m ago•0 comments

Will Smith helped discover new species of anaconda

https://arstechnica.com/science/2026/01/that-time-will-smith-helped-discover-new-species-of-anaco...
2•homo_economicus•3m ago•0 comments

Show HN: Agent-of-empires: opencode and claudecode session manager

https://github.com/njbrake/agent-of-empires
2•river_otter•3m ago•0 comments

Show HN: words.zip – Massively infinite word search

https://words.zip/
2•yathern•4m ago•0 comments

Datafun – functional language that generalizes Datalog

https://www.rntz.net/datafun/
2•PaulHoule•4m ago•0 comments

US Authoritarian Regime Executes Unarmed Civilian as Ruler Grows More Erratic

https://zeteo.com/p/trump-us-regime-executes-civilian-isolated
3•xbmcuser•5m ago•0 comments

Show HN: A minimal wrapper for stable FastAPI WebSockets

https://github.com/yuuichieguchi/capsule-rsc
1•yuu1ch13•6m ago•0 comments

Show HN: Will be the best unit conversion site on the planet

https://mrunit.net
1•thenodeshift•7m ago•0 comments

LLVM: The Bad Parts

https://www.npopov.com/2026/01/11/LLVM-The-bad-parts.html
2•vitaut•8m ago•0 comments

North America's Elevator Problem [video]

https://www.youtube.com/watch?v=Or1_qVdekYM
1•Klaster_1•8m ago•0 comments

Are You Dead?

https://twitter.com/tongbingxue/status/2010631573251690622
1•harscoat•11m ago•0 comments

I built an interactive SHA-256 visualizer

https://github.com/bitcoin-dev-project/hashes-visualizer
1•jrakibi•12m ago•0 comments

UN chief 'shocked' by reports of excessive force against protesters in Iran

https://www.ungeneva.org/en/news-media/news/2026/01/114716/un-chief-shocked-reports-excessive-for...
2•mhb•12m ago•0 comments

Meta taps Dina Powell McCormick as president and vice chairman

https://www.axios.com/2026/01/12/meta-dina-powell-mccormick-president-vice-chairman
2•aaronarduino•14m ago•0 comments

Onion Futures Act

https://en.wikipedia.org/wiki/Onion_Futures_Act
1•r0f1•17m ago•0 comments

How to Make a Damn Website

https://lmnt.me/blog/how-to-make-a-damn-website.html
1•todsacerdoti•18m ago•1 comments

Ask HN: Job seekers, what's working / not working?

3•Jabbs•19m ago•2 comments

Smart Glasses Would Adjust Focus on the Fly Based on Your Eye Movements

https://www.cnet.com/health/personal-care/ixi-eyewear-smart-glasses-autofocus-lenses/
1•smurda•20m ago•0 comments

Show HN: I built Lexica, a bot that texts you a Word-of-the-Day every morning

https://lexica.io
1•sestarkman•22m ago•0 comments

Claude Shannon's randomness-guessing machine

https://www.loper-os.org/bad-at-entropy/manmach.html
1•Kotlopou•22m ago•0 comments

The news media blew it again: iOS 26 adoption measured only third-party browsers

https://lapcatsoftware.com/articles/2026/1/3.html
2•frizlab•23m ago•0 comments

Traditional NLP is not dead

https://alex-jacobs.com/posts/beatingbert/
1•tacoooooooo•23m ago•0 comments

Progressive Disclosure of Agent Tools from the Perspective of CLI Tool Style

https://github.com/musistudio/claude-code-router/blob/main/blog/en/progressive-disclosure-of-agen...
1•musistudio•24m ago•1 comments

Show HN: I got tired of "Reliability Spaghetti," so I monkeypatched PydanticAI

1•steer_dev•26m ago•0 comments

Cue Does It All, but Can It Literate?

https://xlii.space/cue/cue-does-it-all-but-can-it-literate/
2•xlii•26m ago•0 comments

The Chinese Company Taking on the Memory-Chip Giants

https://www.wsj.com/tech/the-chinese-company-taking-on-the-worlds-memory-chip-giants-78dfea55
1•fortran77•26m ago•1 comments

Digital detox isn't enough: how technology addiction changes your brain

https://medium.com/@6thMind/digital-detox-isnt-enough-how-technology-addiction-changes-your-brain...
2•smanuel•26m ago•0 comments