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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!

IrisFlow – open-source Mac overlay dictation (hold Left-Ctrl)

https://github.com/joyboy5477/IrisFlow
1•vishwaka•1m ago•0 comments

The 92-Year-Old Mathematician and the Teenage Apprentice

https://www.nytimes.com/2026/09/06/science/92-year-old-mathematician-apprentice.html
1•robinhouston•7m ago•0 comments

Surplus Agriculture Equipment

https://svdisposition.com/
1•Bluestein•8m ago•0 comments

'Model fatigue' sets in as AI labs race to roll out new versions

https://www.cnbc.com/2026/09/06/meta-google-openai-anthropic-ai-model-fatigue.html
2•cramer4next•8m ago•0 comments

Emma: The GP's AI Receptionist doesn't understand Yorkshire or security

https://floorjellyboot.infinityfree.io/?u=/2026/09/05/emma-the-gps-ai-receptionist-doesnt-underst...
1•floorjellyboot•9m ago•0 comments

And Yet It Warms: Federal Judges and Climate Change

https://www.nybooks.com/articles/2026/09/24/and-yet-it-warms-federal-judges-and-climate-change/
1•mitchbob•10m ago•1 comments

The Kuycon P20 – 28" 4500x3000px 3:2 monitor

https://taoofmac.com/space/reviews/2026/09/06/1800
1•zdw•10m ago•0 comments

Why your Delaware franchise tax notice says $85,165 (calculator)

https://www.incorpassist.com/blog/us-states/delaware-franchise-tax
1•incorpassist•21m ago•0 comments

The Jobs Apocalypse Is Postponed. An AI Jobs Boom Is Here

https://www.economist.com/finance-and-economics/2026/09/04/the-jobs-apocalypse-is-postponed-an-ai...
2•karakoram•25m ago•1 comments

All About IQ. Does AI Have an IQ?

https://desnitch.substack.com/p/what-is-your-iq-ready-to-take-this
1•desnitch•27m ago•0 comments

The AI Boom Is Coming for Your Gadgets

https://www.economist.com/graphic-detail/2026/09/03/the-ai-boom-is-coming-for-your-gadgets
1•karakoram•27m ago•1 comments

A party game for the couch. The game plays on the TV your phone is the buzzer

https://couchbattles.com
4•DCnow•29m ago•1 comments

US has access to more than half of Australia's military bases

https://www.theguardian.com/australia-news/ng-interactive/2026/sep/07/us-military-bases-in-austra...
2•siquick•32m ago•0 comments

Robots just had their GPT3 moment [video]

https://www.youtube.com/watch?v=cqwKceUSZ5Q
1•nazgul17•33m ago•1 comments

Show HN: Blueprintr – Diagram-first knowledge base with live cloud import

https://blueprintr.io
1•JoshJamesAnthon•40m ago•1 comments

The Living Documents Manifesto

https://orionfold.com/manifesto/
1•arkwor•41m ago•0 comments

The Continued Decline of White Collar Prosecutions

https://therevolvingdoorproject.org/the-continued-decline-of-white-collar-prosecutions/
2•paulpauper•41m ago•1 comments

Federated Stars (2024)

https://domaindrivenarchitecture.org/blog/2024-06-05-howto-federated-stars/
1•birdculture•42m ago•0 comments

Elena Ferrante and the people who vouched for her

https://www.strangeclarity.com/p/elena-ferrante-and-the-people-who
1•paulpauper•44m ago•0 comments

Do children grow continuously or do they grow in fits and starts?

https://statmodeling.stat.columbia.edu/2026/08/31/fits-and-starts/
2•paulpauper•44m ago•0 comments

3D Printed Hydrogels for Soft Robotic Applications (2025)

https://www.sciencedirect.com/org/science/article/pii/S0973862225000261
1•pliiight•48m ago•0 comments

VCF West 2026: Making games in the 1980s – David Crane, Garry Kitchen [video]

https://www.youtube.com/watch?v=9ramxZ1a6NM
1•fortran77•50m ago•0 comments

Show HN: Antifailure, a disposable copy of production for every pull request

https://antifailure.dev
3•VirS•51m ago•1 comments

Slop-Creep: When Building Gets Cheaper Than Thinking

https://awaitinginput.substack.com/p/slop-creep-when-building-gets-cheaper
2•bs2•52m ago•0 comments

Elon Musks 7 Predictions?

https://nostradamusintellect.com/articles/elon-musk-predictions-scored
1•Nikola5•53m ago•0 comments

Show HN: MaskShift – a maximalist coding agent with zero NPM dependencies

https://github.com/nafeeur/MaskShift
1•Nafeeur•55m ago•0 comments

David Rumsey Map Collection

https://www.davidrumsey.com
2•twalichiewicz•57m ago•1 comments

Armed man attacks Ohio governor candidate Amy Acton, several injured

https://www.dispatch.com/story/news/politics/2026/09/06/armed-man-attacks-ohio-governor-candidate...
4•cocacola1•1h ago•0 comments

Apple Just Fixed TestFlight

https://www.macrumors.com/2026/09/04/apple-just-fixed-testflight/
2•7777777phil•1h ago•0 comments

Show HN: AlternateRealities.lol – Create any kind of poing and click story

https://alternaterealities.lol
2•nihey•1h ago•0 comments