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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!

The secretive powerbroker with a tight grip on corporate Spain

https://www.ft.com/content/708bbf41-a174-4c04-b96d-c6cfeca2a805
1•petethomas•3m ago•0 comments

Timelang: Natural Language Time Parser

https://timelang.dev/
1•kamranahmedse•6m ago•1 comments

Young Men Are Lost. A New Book Can Guide the Way

https://www.bloomberg.com/news/articles/2026-01-12/day-trader-memoir-generation-desperation-a-fra...
2•petethomas•9m ago•0 comments

Trump Touts New Microsoft Data-Center Pledges After Local Backlash

https://www.wsj.com/livecoverage/stock-market-today-dow-sp-500-nasdaq-01-12-2026/card/trump-touts...
1•nycdatasci•9m ago•0 comments

Show HN: ProofLoop – Autonomous long-running agents with verifiable completion

https://github.com/exiw-ai/proofloop
1•egordev•13m ago•0 comments

Show HN: I made a $25 lifetime Screen Studio alternative

https://debut.sh/
1•ben_hrris•17m ago•0 comments

Are Atomic Operations Better Than a Mutex? It Depends

https://madflojo.dev/posts/are-atomic-operations-faster-than-a-mutex/
1•madflojo•19m ago•0 comments

They Write the Right Stuff

https://www.fastcompany.com/28121/they-write-right-stuff
1•robbs•24m ago•1 comments

A rare interview with the elusive Agatha Christie

https://www.bbc.com/culture/article/20260109-a-rare-interview-with-the-elusive-agatha-christie
1•1659447091•25m ago•0 comments

Be Wary of Digital Deskilling

https://calnewport.com/be-wary-of-digital-deskilling/
2•monobot12•25m ago•0 comments

Show HN: Yoth-yoth – your all-in-one workspace

https://yoth-yoth.com/hello
2•volokh•31m ago•0 comments

Data is not available upon request

https://osf.io/preprints/psyarxiv/jbu9r_v3
2•sien•32m ago•0 comments

I Graduated from Survival Mode

https://www.fieldnotes.nautilus.quest/p/i-graduated-from-survival-mode
1•zeldapoem•33m ago•0 comments

The Pentagon used a secret aircraft painted to look like a civilian plane

https://www.nytimes.com/2026/01/12/us/politics/us-boat-attacks-law.html
2•perihelions•34m ago•2 comments

Verizon to stop automatic unlocking of phones as FCC ends 60-day unlock rule

https://arstechnica.com/tech-policy/2026/01/fcc-lets-verizon-lock-phones-for-longer-making-it-har...
3•DefineOutside•40m ago•0 comments

A 'Holy Grail' Sleep Apnea Pill Could Be on the Market Next Year

https://www.forbes.com/sites/amyfeldman/2026/01/12/a-holy-grail-sleep-apnea-pill-could-be-on-the-...
2•cebert•40m ago•2 comments

Great code doesn't matter if you can't sell it

https://platformtoolsmith.com/blog/senior-engineer-part-3/
2•sharp-dev•40m ago•1 comments

FCC revises Verizon phone unlocking rules after significant fraud issues

https://www.reuters.com/business/media-telecom/fcc-revises-verizon-phone-unlocking-rules-after-si...
2•petethomas•40m ago•0 comments

Canada's Scaling Problem Isn't Compute, It's Coastlines

https://zeitgeistml.substack.com/p/canadas-scaling-problem-isnt-compute
2•sjosh003•41m ago•0 comments

Show HN: Minimal type-safe language for software architecture

https://github.com/tesserato/Tect
2•tesserato•42m ago•0 comments

Bug 55867 – Doesn't know how to tag XI_TRACKBALL

https://bugs.freedesktop.org/show_bug.cgi?__goaway_challenge=meta-refresh&__goaway_id=bdd4239d39d...
1•rballpug•47m ago•3 comments

From Starbase: Pete Hegseth on Defense Innovation Reform [video]

https://www.youtube.com/watch?v=MlRm9tCT0Ug
1•0xWTF•50m ago•1 comments

Meta shakes up its review system with 'stronger rewards for top performers'

https://www.businessinsider.com/meta-performance-review-system-stronger-rewards-top-performers-20...
2•ryandrake•56m ago•0 comments

Paramount Wants Warner to Show Its Work

https://www.bloomberg.com/opinion/newsletters/2026-01-12/paramount-wants-to-warner-to-show-its-work
1•feross•56m ago•0 comments

Turning Agents into Learning Machines

https://twitter.com/ashpreetbedi/status/2010781132418064750
1•bedify•58m ago•0 comments

DJT Says Microsoft to Make Changes to Curb Data Center Power Costs for Americans

https://money.usnews.com/investing/news/articles/2026-01-12/trump-says-microsoft-to-make-changes-...
1•schmuckonwheels•1h ago•1 comments

Living with LLMs Everywhere – How Ambient LLMs Negate Security Policy

1•djwide•1h ago•0 comments

Who Companies Call When They Want to Become a Bank

https://www.bloomberg.com/news/articles/2026-01-12/fintechs-call-klaros-group-when-they-want-bank...
1•petethomas•1h ago•0 comments

Apple: You (Still) Don't Understand the Vision Pro

https://stratechery.com/2026/apple-you-still-dont-understand-the-vision-pro/
2•feross•1h ago•1 comments

Show HN: Idlen.io ($IDL), the first privacy-first AI ad network is launched

https://www.idlen.io/fr/
4•paulefizelier•1h ago•1 comments