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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!

Training Your Own Models Is a Stupid Idea

https://www.artificialintelligencemadesimple.com/p/training-your-own-models-is-an-incredibly
1•mmnfrdmcx•3m ago•0 comments

Revolut down globally since 09:47 CEST, payments not working

https://www.revolut.com/en-PL/system-status/
2•damidekronik•3m ago•0 comments

Order of Adjectives

https://dictionary.cambridge.org/grammar/british-grammar/adjectives-order
1•thunderbong•3m ago•0 comments

Who Owns a Pull Request?

https://evans.bike/who-owns-a-pull-request
1•civilchaos•5m ago•1 comments

Seinfeld – TV's last great startup

https://www.acquired.fm/episodes/seinfeld
1•vismit2000•8m ago•1 comments

Running Apertus: A Swiss-Made Multimodal LLM

https://blog.x504.dev/p/running-apertus-a-swiss-made-multimodal
1•asteriskeng•8m ago•0 comments

The chase is becoming an AI feature. In Portugal, nobody asks yet

https://gil-neto.com/blog/the-chase-is-becoming-an-ai-feature/
1•gilneto8•9m ago•0 comments

Answerrank's link investigation is wild

https://answerrank.so/features
1•gamerdivas•12m ago•0 comments

Everything is going wrong for Muhammad bin Salman

https://www.economist.com/middle-east-and-africa/2026/10/19/everything-is-going-wrong-for-muhamma...
2•u1hcw9nx•16m ago•0 comments

Newest VSCode pushing horrible and experimental Copilot harness as default

https://code.visualstudio.com/updates/v1_142
1•trakkstar•17m ago•0 comments

CPU-native. Deterministic. O(1) processes. – the Old New Coolness

2•KathiaGatterer•18m ago•1 comments

You're still going to have a job in 5 years

https://dev.fast/blog/youre-still-going-to-have-a-job-in-5-years/
2•sidharthkmenon•20m ago•0 comments

What Children Learn

https://github.com/withmarbleapp/os-taxonomy
1•memalign•22m ago•0 comments

The coastline paradox will kill your startup

https://objective0.substack.com/p/the-coastline-paradox-will-kill-your
1•tosh•25m ago•0 comments

Unprecedented atlas explores mitochondria across the tree of life

https://www.nature.com/articles/d41586-026-03195-9
1•the-mitr•26m ago•0 comments

CloudSecure – Open-source, local-first CNAPP suite in pure Rust

https://github.com/kennyanju/plantainchips
1•kennyanju•27m ago•0 comments

The Pull Request Needs to Die by Ethan Knox

https://medium.com/@ethan.m.knox/the-pull-request-needs-to-die-057e3ddd769f
1•nikhilol•28m ago•0 comments

ZXCode – VS Code programming environment for ZX Spectrum

https://github.com/banyek/ZXCode
1•banyek•28m ago•1 comments

Reducing the cognitive load of AI changes

https://amoffat.github.io/blog/cognitive-load.html
1•birdculture•28m ago•1 comments

How to Use Decision Models for Evals

https://hamel.dev/blog/posts/decision-model-evals/
1•meetpateltech•29m ago•0 comments

Revolut payment and app is down

https://www.revolut.com/system-status/
5•albelfio•29m ago•2 comments

News consumption on social media in U.S. by websites and demographics

https://www.pewresearch.org/journalism/fact-sheet/social-media-and-news-fact-sheet/
1•giuliomagnifico•30m ago•0 comments

GCP Europe-West2 Outage

6•jack7e•36m ago•5 comments

Show HN: A practical framework for evaluating agentic AI systems

https://deepsense.ai/blog/your-agent-passed-the-eval-should-you-ship-it/
1•nvmdbljstm•48m ago•0 comments

I Talked to Workers at Amazon, Meta, & Microsoft About the AI Watching Them [video]

https://www.youtube.com/watch?v=ca7ufSI1Qxg
1•vrganj•48m ago•0 comments

Anyone Used the OAI Batch API or Azure OAI Batch API for Bulk Data Processing?

https://learn.microsoft.com/en-us/azure/foundry/openai/how-to/batch
1•nvmdbljstm•50m ago•1 comments

Will developing nations be able to handle AI agents?

https://restofworld.org/2026/meta-muse-openai-dots-ai-agents-global-south/
1•donk8r•53m ago•0 comments

Show HN: Clippy, the Office Assistant, on the macOS Desktop

https://github.com/coignard/clippy
1•renecoignard•54m ago•0 comments

HealthBench Base and Prof: Evaluating models in realistic health conversations

https://artificialanalysis.ai/articles/healthbench-professional-health-conversations
1•theanonymousone•54m ago•0 comments

StreetComplete v64.0

https://github.com/streetcomplete/StreetComplete/releases/tag/v64.0
1•iruoy•54m ago•0 comments