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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!

Healthcare AI's next test is integration

https://www.technologyreview.com/2026/09/10/1141421/healthcare-ais-next-test-is-integration/
1•joozio•2m ago•0 comments

Ask HN: What is the proper way of preventing AI labs to use your private data

1•ozgung•3m ago•0 comments

Humble Bundle – 24 Linux, Cloud and Agentic AI Books

https://www.humblebundle.com/books/ultimate-linux-cloud-infrastructure-bundle-packt-books
1•kartikeypan•5m ago•0 comments

Static hosting a coding agent can drive end to end

https://novence.ai
1•LincChad•5m ago•0 comments

Yemen's Houthis Seize Strategic Red Sea Port, Officials Say

https://www.nytimes.com/2026/09/10/world/middleeast/yemens-houthis-seize-strategic-red-sea-port-o...
1•ceejayoz•5m ago•0 comments

Search engine may access the user's location without prompting them

https://chromium.googlesource.com/chromium/src.git/+/main/docs/x_geo_header.md
1•kozika•8m ago•0 comments

iPhone Pro Materials, Ranked

https://volatileinputs.com/2026/04/iphone-pro-materials-ranked/
1•simonebrunozzi•12m ago•0 comments

Keyword Research Tools

https://topkeywordresearchtools.com/
1•Keywordstat•13m ago•0 comments

The Einstein test: what happens when AI tries to rediscover relativity?

https://www.nature.com/articles/d41586-026-02804-x
1•bookofjoe•15m ago•0 comments

The Limits of Miles Driven as AV Safety Evidence

https://muraiki.github.io/av_safety/limit_miles_evidence/
1•muraiki•15m ago•0 comments

Test your agent in a simulation of your stack before it touches prod

https://sonatalabs.ai/
1•matildagh•15m ago•1 comments

Neuriva

https://www.facebook.com/NeurivaTry/
1•rafygabu•16m ago•0 comments

AI isn't going to kill us

https://thecritic.co.uk/the-1-5-billion-ai-doomsday-cult/
1•romaniitedomum•16m ago•0 comments

TrustDento | India's Trusted Dental Care Network

1•nxtoffer•18m ago•0 comments

Caltech mathematicians call for suspension of AI Mathathon

https://proofsandprompts.com/2026/09/10/open-letter-about-the-mathathon/
1•doubledamio•21m ago•0 comments

PrimalLift

https://www.facebook.com/PrimalLiftTry/
1•najudasy•21m ago•0 comments

DeepJIT: Header-Only C++20 JIT Runtime for Nvidia CUDA and Huawei Ascend

https://github.com/deepseek-ai/DeepJIT
1•mehmetoguzderin•27m ago•0 comments

Thanks to Siri Recaps, your Apple Watch is always listening

https://www.techradar.com/health-fitness/smartwatches/thanks-to-siri-recaps-your-apple-watch-is-a...
5•geox•28m ago•0 comments

Pushing Collision Attacks on SHA-2 to 39 Steps

https://eprint.iacr.org/2026/1120
1•gslin•28m ago•0 comments

DeepSeek v4.1-Flash on Openrouter

https://openrouter.ai/deepseek/deepseek-v4.1-flash
1•manoji•28m ago•0 comments

PlayStation cancels Kojima's PHYSINT, Xbox steps in

https://twitter.com/hideo_kojima_en/status/2097877506401681753
6•HatchedLake721•29m ago•0 comments

Sellular – Boost SaaS Visibility

https://Sellular.online
1•Spark88•29m ago•0 comments

React 19.3: View Transitions and Fragment Refs are now stable

https://react.dev/blog/2026/09/09/react-19-3
2•joshcsimmons•30m ago•0 comments

Towards Self-Driving Codebases

https://cursor.com/blog/self-driving-codebases
1•tosh•30m ago•0 comments

Gemini 3.8 Flash passed Claude Fable 5.1 on this bench

https://chessbench.ai
2•soltanov•31m ago•0 comments

Outdoor Signage

https://www.ambert.ae
1•doshopzone•33m ago•0 comments

Scientificfigure

https://scientificfigure.com
1•ahmadrodriguezs•35m ago•0 comments

Nvidia and Palantir want to speed up the AI buildout. Nvidia is first in line

https://www.fastcompany.com/91604370/nvidia-palantir-sovereign-ai-supply-chains
1•johnshades•36m ago•0 comments

From One Horizontal Scaling Controller to Many: Evolving Uber's Compute Platform

https://www.uber.com/mx/en/blog/evolving-ubers-compute-platform/
1•theanonymousone•38m ago•0 comments

Drones Recreate Twin Towers

https://abc7ny.com/post/drone-show-recreates-twin-towers-honors-2977-victims-ahead-25th-anniversa...
2•TechTechTech•40m ago•0 comments