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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!

A programming language is a medium for people

https://fuzzypixelz.com/articles/a-medium-for-people/
1•fuzzypixelz•1m ago•0 comments

Show HN: Sprout – a TUI habit tracker written in Rust

https://github.com/kb019/sprout
1•kb019•1m ago•0 comments

The Perfect Crime: LLM Agents Can Easily Tamper with Their Own Traces

https://perfect-crime.ai/
1•not_a_feature•1m ago•0 comments

New Digital Voice Mode for HF Radio

https://www.arrl.org/arrlletterissue?issue=2026-09-24#Will-RADE-Be-the-Next-SSB
1•7402•1m ago•0 comments

Open Source AMS for Bambu Labs

https://github.com/Amsozzer1/AMS
1•Amsozzer•3m ago•1 comments

Show HN: I'm a dermatologist and I vibe coded a 3D biophysical skin model

https://www.drmagnuslynch.com/skin
1•sungam•3m ago•0 comments

EnigmaForge – an LLM benchmark where the question is hidden in the story

https://arxiv.org/abs/2609.30144
1•robottwo•4m ago•0 comments

Buying a New Computer (1993)

https://archive.org/details/BuyingaN
1•doener•4m ago•0 comments

It Was the Harness, Not the Model

https://blog.herlein.com/post/harness-not-model/
2•aray07•6m ago•0 comments

How Pew Research Center is – and is not – using AI in our work

https://www.pewresearch.org/decoded/2026/09/28/how-pew-research-center-is-and-is-not-using-ai-in-...
3•hn_acker•8m ago•0 comments

The Untold Origins of Trump's Plan to Sharply Restrict Mail-In Voting

https://www.propublica.org/article/trumps-plan-to-restrict-mail-voting
3•hn_acker•8m ago•0 comments

Parasocial media: why influencers aren't your friend

https://www.baldurbjarnason.com/2026/04-parasocial-relationships/
1•PaulHoule•10m ago•0 comments

Stanford Encyclopedia of Philosophy

https://plato.stanford.edu/
1•akeck•11m ago•0 comments

Dodge's Fire-Preventing Ejecting Battery Patent

https://www.jalopnik.com/2269595/dodge-fire-preventing-ejecting-battery-patent/
2•cf100clunk•11m ago•0 comments

Manus 2.0

https://manus.im/blog/introducing-manus-2-0
3•canberkys•11m ago•0 comments

Ask HN: Finetuning strategies

1•moka_labs•12m ago•1 comments

Small Decisions: Engineering a Leading Model

https://brooker.co.za/blog/2026/09/28/engineering-system-one.html
2•emschwartz•12m ago•0 comments

The Download: rogue agent liability and the AI Hype Index

https://www.technologyreview.com/2026/09/28/1145202/the-download-rogue-agent-liability-and-the-ai...
2•joozio•14m ago•0 comments

Singer: The Downfall of a Great American Manufacturer

https://www.worseonpurpose.com/p/who-makes-singer-sewing-machines
2•cainxinth•15m ago•0 comments

Firefox 157

https://www.neowin.net/news/firefoxs-biggest-update-in-years-launches-tomorrow-heres-how-to-get-i...
3•bundie•16m ago•0 comments

How private equity is killing public access to hospitals and emergency care

https://www.washingtonpost.com/ripple/2026/09/25/private-equity-hospital-closures/
3•toomuchtodo•16m ago•2 comments

Fifty Years of Semicolons

https://jordanzimmerman.com/fifty-years-of-semicolons.html
2•adrianfcole•17m ago•0 comments

Driver Ticketed for No Insurance Just Because Flock (YC 2017) Said She Didn't

https://www.techdirt.com/2026/09/28/driver-ticketed-for-no-insurance-despite-having-insurance-jus...
2•HotGarbage•18m ago•0 comments

The Artificial Analysis Cyber Index

https://artificialanalysis.ai/articles/artificial-analysis-cyber-index
1•AnodicElegy•18m ago•0 comments

Florida asks court to bar OpenAI from new models as part of child harm lawsuit

https://www.reuters.com/world/florida-asks-court-bar-openai-developing-new-models-part-child-harm...
2•theanonymousone•20m ago•0 comments

Synthetic Sagas

https://www.scattered-thoughts.net/writing/synthetic-sagas/
1•ffin•20m ago•0 comments

We Can't Let Enormous Weirdos Regulate AI

https://little-flying-robots.ghost.io/why-we-cant-let-enormous-weirdos-regulate-ai/
1•SLHamlet•20m ago•0 comments

AI tutoring outperforms in-class active learning

https://www.nature.com/articles/s41598-025-97652-6
1•theanonymousone•22m ago•0 comments

An AlphaGo Moment for Inference?

https://int21.ai/insights/ai-generated-inference-engines/
1•antinucleon•25m ago•0 comments

How SLR cameras work: Nikon F3 (2023) [video]

https://www.youtube.com/watch?v=0AA-Le7cmH0
1•nayuki•25m ago•1 comments