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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!

Stop Babysitting Your Agent: Build the Agent Loop [video]

https://www.youtube.com/watch?v=RQEwXaawOso
1•sam_3•41s ago•0 comments

How to Change Text in an Image Without Photoshop in 2026

https://rewordsai.app/blog/tested-10-image-text-removers
1•wangneo276•5m ago•0 comments

Somebody Vibe Coded Every Single Adobe App [video]

https://www.youtube.com/watch?v=eFB79TYI-Vw
1•zazuke•5m ago•0 comments

Margaret Hamilton, whose software powered Apollo 11 moon landing, dies at 90

https://www.theguardian.com/science/2026/oct/07/margaret-hamilton-moon-computer-software
1•ljf•5m ago•0 comments

Gigabyte W775-V10-L01 Hands-On Bringing Nvidia GB300 Deskside

https://www.servethehome.com/gigabyte-w775-v10-l01-hands-on-bringing-nvidia-gb300-deskside/
1•lumpa•5m ago•0 comments

Surface Laptop Ultra

https://blogs.windows.com/devices/2026/10/07/pre-order-our-most-powerful-surface-devices-ever/
2•tosh•8m ago•0 comments

One's Vibe – discover AI-built products you can try

https://onesvibe.app
1•ZeljkoS•9m ago•0 comments

Macropay-Solutions PHP-Framework is out and fast

https://macropay-solutions.com
1•marius-ciclistu•15m ago•0 comments

'Bendy Tree' in Co Down Wins Tree of the Year Competition

https://www.rte.ie/news/ireland/2026/1008/1594484-down-tree-of-the-year/
1•austinallegro•15m ago•0 comments

Ask HN: Preferred state management for enterprise Flutter in 2026?

1•nmdemirkol•17m ago•0 comments

Veda

https://github.com/vahmoh25/Veda
1•vahmoh25•17m ago•0 comments

OpenAI Withdraws 3 Math Papers

https://github.com/openai/math/blob/main/history.md
2•theemathas•17m ago•0 comments

KizunaShelf – a shelf for everything you love

https://kizunashelf.app/
1•mudkipme•18m ago•1 comments

From Expert-Guided Proof Search to Automated Open-Problem Solving

https://arxiv.org/abs/2610.09769
2•sbulaev•19m ago•0 comments

OpenAI withdraws three of their recent manuscripts

https://github.com/openai/math/pull/1/files/301488868beec11bfd897168433b0a64f5258559
2•qnleigh•19m ago•1 comments

Vallic Cloud is live: all the infrastructure, almost none of the ops

https://vallic.com/blog/vallic-cloud-live-all-infrastructure-almost-none-ops-115
1•taubek•21m ago•0 comments

The Beginning of Software Engineering

https://fosscomics.com/posts/5.%20The%20Beginning%20of%20Software%20Engineering/#comic-panel-hire...
1•Bluestein•24m ago•0 comments

I've Been Deindexed by Google

https://kennyqin.com/deindexed-by-google/
2•BrunoBernardino•26m ago•0 comments

Most Recycling Is a Waste

https://www.wsj.com/opinion/most-recycling-is-a-waste-091924e1
4•MrBuddyCasino•27m ago•0 comments

Image Reconstruction from Brain Scans

https://www.technologyreview.com/2026/10/01/1145588/ai-mind-reading-reconstructs-what-youre-looki...
1•tschenbims•28m ago•0 comments

I Built the Widest Street Legal Car [video]

https://www.youtube.com/watch?v=PvTyTUkuem8
1•trymas•29m ago•0 comments

Why the AI Determinism Argument Annoys Me

https://blog.demofox.org/2026/10/07/why-the-ai-determinism-argument-annoys-me/
1•atan2•29m ago•0 comments

AI agent designs a complete RISC-V CPU from a 219-word spec sheet in 12 hours

https://www.tomshardware.com/tech-industry/artificial-intelligence/ai-agent-designs-a-complete-ri...
3•fork-bomber•33m ago•0 comments

Arteris Wins Funding to Expand Hardware Design Supply Chain Security Assurance

https://ir.arteris.com/news-releases/news-release-details/arteris-wins-funding-expand-hardware-de...
1•fork-bomber•35m ago•0 comments

Upbeat Launches Bluemag SiFive RISC-V Based Pi Drone Controller with Onboard AI

https://www.upbeattechtw.com/newsroom/press-releases/ceatec2026
1•fork-bomber•37m ago•0 comments

Do we know how to make cities safer for women?

https://www.not-ship.com/safe-streets-women/
1•Pamar•39m ago•0 comments

Stack Overflow 2026 Developer Survey

https://survey.stackoverflow.co/2026/technology/data/da-language
1•vinhnx•40m ago•0 comments

Video Upscaler AI

https://www.videoupscalerai.io
1•CarolLuoyiyi•42m ago•0 comments

I can't stop thinking about the Kalahari Bushmen

https://mapwriting.substack.com/p/why-i-cant-stop-thinking-about-the
1•podocarp•44m ago•1 comments

Scene at MIT: Margaret Hamilton's Apollo Code

https://news.mit.edu/2016/scene-at-mit-margaret-hamilton-apollo-code-0817
1•Bluestein•45m ago•0 comments