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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!

Show HN: Switcheroo – manage logins for 10 CLIs like Vercel, Codex etc.

1•ftchd•27s ago•0 comments

The End of Friday Nights with Friends

https://journals.sagepub.com/doi/full/10.1177/23780231261478215
1•marojejian•55s ago•0 comments

Should I Do This?

1•Ahhhhhh2664645•1m ago•0 comments

How I Rickrolled a Hospital

https://chaozz.nl/articles/how-i-rickrolled-a-hospital/
1•chaozznl•2m ago•0 comments

Switching Password Managers in 2026

https://rmondello.com/2026/09/07/switching-password-managers-2026/
1•cdrnsf•2m ago•0 comments

Trump downplays warnings of AI risks as he cites rivalry with China

https://www.bbc.co.uk/news/articles/c7v48vp31mdo
2•chrisjj•3m ago•0 comments

Gptel: Emacs Y La IA

https://notxor.nueva-actitud.org/2026/09/13/gptel-emacs-y-la-ia.html
1•dalvrosa•3m ago•0 comments

The Contagion of Fear

https://bcantrill.dtrace.org/2026/09/13/the-contagion-of-fear/
2•elffjs•4m ago•0 comments

Ask HN: Multi-agent workflows in production; Where people using 1000s of agents?

1•ramstar3000•5m ago•0 comments

Former EPA Officials: Trump Is Letting Data Centers Make People Sick

https://www.motherjones.com/politics/2026/09/trump-epa-data-centers-epn-report-health-hazards/
1•cdrnsf•8m ago•0 comments

Donald Trump rejects calls from tech bosses for AI slowdown

https://www.ft.com/content/cae60732-f929-4735-a627-db8c14e7c7ed
2•higginsniggins•9m ago•0 comments

Physicists can't agree on how the Universe works

https://www.sciencedaily.com/releases/2026/09/260912220041.htm
2•gradus_ad•15m ago•0 comments

Meta$^N$: Recursive Self-Improvement Through Emergent Depth

https://arxiv.org/abs/2608.24735
3•Anon84•18m ago•0 comments

Navier-Stokes Visualized as 1kB i386 demos

https://juandecos.github.io/TurboZip/vortex.html
2•chaostaco•20m ago•1 comments

Looking for Some Beta Testers

https://nevarroapp.com/
1•Linden207•24m ago•0 comments

DeepSeek Peak Hours

https://deepseek-peak-hours.sivaram.dev/
2•denysvitali•25m ago•0 comments

AI extinction is only one way the future is frightening

https://www.rnz.co.nz/news/world/1362349/ai-extinction-is-only-one-way-the-future-is-frightening
5•billybuckwheat•28m ago•1 comments

Memos.page

https://memos.page/
2•montyanderson•28m ago•0 comments

Unified Plan to Align Priorities and Investments for Strategic Petroleum Reserve

https://files.gao.gov/reports/GAO-26-106918/index.html
2•Bluestein•28m ago•0 comments

Show HN: Swobu – Local LLM Switchboard You Can Share over HTTPS

https://github.com/swobuforge/swobu
1•metrofun•29m ago•0 comments

The Last AI Built by Humans: Toward Genuine Recursive Self-Improvement

https://arxiv.org/abs/2609.11873
1•pella•35m ago•0 comments

Show HN: What Just Pinged Me?

https://whatjustpingedme.com
2•furyofantares•37m ago•0 comments

China Cleantech Exports Data Explorer

https://ember-energy.org/data/china-cleantech-exports-data-explorer/
2•Bluestein•38m ago•0 comments

Byte: A Visual Archive

https://byte.tsundoku.io/#198410-011
3•doener•39m ago•0 comments

Mees AI Journal and Chat

https://play.google.com/store/apps/details?id=chat.meesai.net&hl=en_US
3•saidevac•49m ago•0 comments

Slime moulds and the bitter debate over the nature of intelligence

https://www.theguardian.com/news/ng-interactive/2026/sep/08/this-is-dangerous-slime-moulds-and-th...
1•bookofjoe•50m ago•0 comments

Portable Cooling Mister and Bonus Stationary Pet Version

https://www.instructables.com/Portable-Cooling-Mister-Bonus-Stationary-Pet-Versi/
1•sudo_cowsay•50m ago•0 comments

Douglas Adams and the exterminated Doctor Who adventure

https://www.bbc.co.uk/news/articles/c8jdp38z4jgo
2•6LLvveMx2koXfwn•53m ago•0 comments

Show HN: I made an automated day-by-day itinerary organizer for my trip to Spain

https://petrelvoyage.com/app
4•desktopentree•55m ago•2 comments

Registration without a phone number on Signal will use zero-knowledge proofs

https://community.signalusers.org/t/registration-without-a-phone-number/2222?page=10
6•Cider9986•55m ago•0 comments