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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!

Astronomers discover the first ever green star

https://www.space.com/astronomy/stars/astronomers-discover-the-1st-ever-green-star-a-cosmic-zombi...
1•bushwart•2m ago•0 comments

The Hugging Face Incident

https://huggingface.wtf/
1•erwald•5m ago•0 comments

Did Ente Locker copy my code without attribution?

https://fairscan.org/blog/did-ente-locker-copy-my-code-without-attribution/
1•mtlynch•5m ago•0 comments

Community Notes for Everything

https://commonnotes.net/
1•toomuchtodo•7m ago•1 comments

Tenstorrent raises $1.5B [$6.2B valuation] to expand its open compute ecosystem

https://siliconangle.com/2026/10/19/chip-legend-jim-kellers-tenstorrent-raises-1-5b-to-expand-its...
2•peter_d_sherman•7m ago•0 comments

Show HN: Omasharp: Build Omarchy apps with C# and .NET

https://github.com/luisrudge/omasharp
1•luisrudge•7m ago•0 comments

DHH goes on white supremacist rant

https://twitter.com/dhh/status/2111638580229439730
3•grandpajoey•7m ago•0 comments

People are using AI to make smart TVs, dumb TVs

https://techcrunch.com/2026/10/19/people-are-using-ai-to-make-their-smart-tvs-dumb-again/
1•privacyisntdead•9m ago•0 comments

PE Bench: Benchmark for private equity analyst work

https://getcompound.ai/blog/introducing-pe-bench
2•peterjliu•10m ago•0 comments

Game decompilation site is closing because AI has 'broken the community aspect'

https://www.videogameschronicle.com/news/one-of-the-biggest-game-decompilation-sites-is-closing-b...
2•CharlesW•11m ago•0 comments

Skymizer HTX301 – IP Licensable AI Accelerator Card with 384GB for 700B Models

https://skymizer.ai/products/htx301/
1•peter_d_sherman•13m ago•0 comments

Why Windows 11 still ships with Windows 95's memory manager hidden inside it

https://www.windowslatest.com/2026/10/19/why-windows-11-still-ships-with-windows-95s-memory-manag...
1•khalidkhair•14m ago•0 comments

Show HN: OpenFlow – AI Agent Workflow Builder

https://github.com/SeeRay11/OpenFlow
1•searay112023•16m ago•0 comments

Bullhorn takes staffing platform offline to contain cyberattack

https://www.bleepingcomputer.com/news/security/bullhorn-takes-staffing-platform-offline-to-contai...
1•toomuchtodo•17m ago•1 comments

Trump Appointees Asked a Federal Agency to Acquire a Voting Machine and Hack It

https://www.propublica.org/article/cisa-election-security-donald-trump
6•soundworlds•19m ago•0 comments

Show HN: Chai-UI – A design system to generative AI apps

https://chai-ui.com/
1•KazaNLP•22m ago•0 comments

The simple words that can expose any liar, according to a forensic linguist

https://www.sciencefocus.com/wellbeing/how-to-catch-a-liar-language
1•gmays•22m ago•0 comments

Advancing coding in low‑resource programming languages

https://openai.com/index/low-resource-programming-languages/#sqlite-fortran
1•smusamashah•25m ago•0 comments

The Remarkable Secrets of Olive Oil

https://www.midwesterndoctor.com/p/the-remarkable-secrets-of-olive-oil
1•bilsbie•26m ago•0 comments

I Accidentally Stepped Off the Algorithm

https://vilkeliskis.com/b/2026/1019.html
1•tadasv•26m ago•0 comments

France's Supermarket Fridges Were Vulnerable Online for Months

https://ipinfo.io/blog/france-fridges-hack
15•emot•27m ago•6 comments

LLMs Deal with Fraudulent Papers

https://www.science.org/content/blog-post/how-llms-deal-fraudulent-papers
1•EA-3167•28m ago•0 comments

Sold a Story 2: What Happened to Teaching

https://features.apmreports.org/sold-a-story/season-2/
1•bcaulfield•28m ago•0 comments

US bans DeepSeek AI from government use as tech tension with China continues

https://www.bbc.com/news/articles/cjkgeq0k1wevo
2•a1o•30m ago•1 comments

Nearly 1 in 5 UC freshmen are flunking math, double the rate from 5 years ago

https://nypost.com/2026/10/19/us-news/uc-system-sees-surge-in-freshmen-failing-introductory-math/
3•bcaulfield•35m ago•2 comments

Word counting app for Novel Writing November

https://wordcairn.gnuware.com/
1•fredpwickerbill•37m ago•1 comments

Ask HN: Bring-your-own-AI hardware

1•flying_sheep•38m ago•0 comments

Flock cameras spread through government deals that bypassed public scrutiny

https://www.nbcnews.com/tech/security/flock-cameras-safety-surveil-spread-location-where-contract...
6•cdrnsf•38m ago•0 comments

Quebec's reserves of maple syrup almost depleted, says new report

https://www.cbc.ca/news/canada/montreal/quebec-maple-syrup-reserves-nearly-depleted-9.7386889
2•BiraIgnacio•41m ago•0 comments

A Spot of Hope for the Beleaguered Software Drone

https://horsedrawingtycoon.com/@cube-drone/blog/a-spot-of-hope-for-the-beleaguered-software-drone
1•tapoxi•43m ago•0 comments