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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!

De-Google with BorgSpace

https://studio.youtube.com/video/LM2EXU3aXd0/edit
1•BorgIOS•40s ago•0 comments

Revolut gave away customers' data

https://www.internationalcyberdigest.com/revolut-gave-away-customers-data/
1•taubek•1m ago•0 comments

Fx can now use a frontier model, then delegate to cheaper models to implement

https://twitter.com/fazxes/status/2098800924776903047
1•wslh•1m ago•0 comments

Vibe Coding Is the New Bootstrap

https://sampleminer.com/blog/vibe-coding-is-the-new-bootstrap/
1•xdotcommer•3m ago•0 comments

Adios Create – Landing page builder

https://www.adios.dev/create
1•clovis818•3m ago•0 comments

The U.N. Backs a New World Map Showing Africa in Its True Relative Size

https://www.npr.org/2026/09/04/nx-s1-5958611/africa-world-map-un-vote
2•karakoram•6m ago•0 comments

Csvcomp – Zero-dependency Python CSV diff utility

https://github.com/prasad-a-abhishek/csvcomp
1•prasadaabhishek•7m ago•0 comments

Namecheap Hosting Is Down

1•wolfgangbabad•10m ago•0 comments

WebSocket is a legacy API (2016)

https://github.com/whatwg/html/issues/2177
1•htunnicliff•11m ago•1 comments

NextJS but in Rust

https://nextrs.hirschi.dev/docs/getting-started
1•ashirsc•12m ago•0 comments

Claude of Tanks

https://github.com/Kevin-Liu-01/Claude-of-Tanks
1•tiredpanda•15m ago•0 comments

Comment: Feeling Sad about AI

https://simonwillison.net/2026/Sep/11/feeling-sad-about-ai/
1•abdelhousni•16m ago•0 comments

Spanish Island Wants to Ditch Drunk British Tourists for Rich American Ones

https://www.wsj.com/world/europe/this-spanish-island-wants-to-ditch-drunk-british-tourists-for-ri...
2•RestlessMind•17m ago•0 comments

Diablo V

https://diablo5.blizzard.com/en-us
1•meerita•17m ago•0 comments

EU CYBER RESILIENCE ACT forces manufacturers to disclose exploited vulnerabilit

https://digital-strategy.ec.europa.eu/en/policies/cra-reporting
3•drungli•20m ago•0 comments

Nvidia in talks to invest in Anthropic's mega IPO

https://www.reuters.com/legal/transactional/nvidia-talks-invest-anthropics-mega-ipo-sources-say-2...
1•cwwc•21m ago•0 comments

Teaching Novice Computing and Programming in the Agentic AI Era [pdf]

https://cs.brown.edu/people/sk/Publications/Papers/Published/fkl-teach-nov-agentic-ai-era/paper.pdf
2•azhenley•23m ago•0 comments

Free Agent – Amp

https://ampcode.com/news/free-agent
3•literallyroy•24m ago•0 comments

The Future of Blender [video]

https://www.youtube.com/watch?v=pTHmtHXwVKY
1•stephdin•24m ago•0 comments

Jeff Park: Lets slow down but not before we IPO not before we dump on retail

https://twitter.com/dgt10011/status/2098815095497253093
2•donsupreme•25m ago•0 comments

Our Eukaryotic Moment

https://contraptions.venkateshrao.com/p/our-eukaryotic-moment
1•brettcvz•30m ago•0 comments

Show HN: Vibe Logic Programming Language

https://cosmos-language-lab-0819.asd-user56.chatgpt.site/
1•mccosmos•30m ago•0 comments

Domain-Specific Hallucination Detection in Large Language Models

https://arxiv.org/abs/2609.11878
1•Betelbuddy•31m ago•0 comments

The Machine That Says No: 1-Bit Music on the ZX Spectrum [video]

https://www.youtube.com/watch?v=ZFL1ad90M2k
1•ofrzeta•33m ago•0 comments

ChiPass Release 2026.09.0

https://codeberg.org/ChiPass/ChiPass/releases/tag/v2026.09.0
1•birdculture•34m ago•0 comments

atx, the true structured text format (2002)

http://www.aaronsw.com/2002/atx/intro.html
1•theanonymousone•34m ago•0 comments

Sensetime Posts First Profit Since Listing as AI Revenue Rises

https://technode.global/2026/08/27/sensetime-h1-2026-first-profit-generative-ai-revenue/
1•drungli•35m ago•0 comments

Aaron Swartz and atx: the spec writer open source lost

https://dev.profullstack.com/~anthony/blog/121-post.html
2•theanonymousone•36m ago•0 comments

Navigating the AI crisis: a humble guide for math students

https://arxiv.org/abs/2609.06889
1•Betelbuddy•42m ago•0 comments

Blasa – turn a Google Maps listing into a live multilingual website

https://blasa.shop/
1•maherzaidoun•45m ago•0 comments