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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!

Finite time blowup with smooth forcing term for porous medium

https://terrytao.wordpress.com/tag/tristan-buckmaster/
1•user_7832•27s ago•0 comments

Ask HN: Is it time to stop making AI?

1•roschdal•2m ago•0 comments

How to Cool Buildings on the Cheap

https://www.economist.com/science-and-technology/2026/09/08/how-to-cool-buildings-on-the-cheap
1•pingou•10m ago•1 comments

Show HN: ZWPlayer 3.3.2, a free HTML5 video player with ads and music mode

https://www.zwplayer.com/
2•logicplayer•11m ago•0 comments

GPT-6 Astra creating GTA San Andreas mods, editing the map and 3D models

https://www.youtube.com/watch?v=isjBe4khZZc
1•sznio•11m ago•1 comments

Roadmap decisions rather than dates

https://lethain.com/decisions-not-dates/
1•saikatsg•13m ago•0 comments

Elon Musk said he needed 'a legion of children before the civil war'

https://www.theguardian.com/film/2026/sep/08/elon-musk-ashley-st-clair-documentary-venice
2•fittingopposite•15m ago•0 comments

"Tweet" and the bird logo apparently enter the public domain

https://blog.ericgoldman.org/archives/2026/09/tweet-and-the-bird-logo-apparently-enter-the-public...
1•progval•16m ago•0 comments

More than 10% probability AI will wipe out humanity within ten years

https://www.forbes.com/sites/siladityaray/2026/09/09/anthropic-alignment-lead-warns-ai-could-kill...
2•nothrowaways•21m ago•0 comments

The Navier–Stokes Millennium Prize Problem

https://simonwillison.net/2026/Sep/8/on-navier-stokes/
7•tosh•23m ago•1 comments

The Math Under Every AI Model: James Wilkinson and Backward Error

https://nirmalutwani.substack.com/p/james-wilkinson-and-the-math-under
1•nutwani91•27m ago•1 comments

Invention may bring smart bionic eye in sight

https://www.rmit.edu.au/news/all-news/2026/sep/neuromorphic-bionic-eye
1•geox•29m ago•0 comments

Introduction · Hugging Face

https://huggingface.co/learn/llm-course/en/chapter1/1
1•evo_9•36m ago•0 comments

Plumbingjobs.org

https://www.plumbingjobs.org/
1•themarinator•40m ago•1 comments

So you want to use OpenRouter?

https://mmoustafa.com/blog/so-you-want-to-use-openrouter/
3•player85•41m ago•0 comments

Meta continues to run ads promoting child sexual abuse material in India

https://www.bbc.com/news/articles/cqxv2vwjjq3o
4•vinni2•46m ago•2 comments

Google: AI agents harvested credentials in under six hours

https://cloud.google.com/blog/topics/threat-intelligence/from-prompting-to-autonomy-the-evolution...
2•lbw1215•49m ago•0 comments

Efficient Exploration Is Enough

https://arxiv.org/abs/2609.07575
1•E-Reverance•51m ago•0 comments

Show HN: AI-first open-source alternative to Microsoft and Google Office

https://github.com/injectinglabs/injoffice
3•nickpismenkov•54m ago•3 comments

The highest paid leader is set for a 64% pay rise

https://www.cnbc.com/2026/09/09/singapore-prime-minister-salary-lawrence-wong.html
2•cramer4next•55m ago•0 comments

Bioelectronics for the Public Good

https://melodyfro.org/
1•eamag•56m ago•1 comments

Demonstrating Quantum Value by Solving the Six Remaining Clay Millennium Problem

https://zenodo.org/records/22179463
1•fourier54•57m ago•0 comments

iTerm Team Cooked

https://iterm2.com/downloads/stable/iTerm2-3_7_0.changelog
3•adrianthedev•59m ago•2 comments

Show HN: Timex – Automatic time tracking for macOS, 0 bytes uploaded

https://gettimex.app/
1•donk8r•1h ago•0 comments

GOG brings back "big box" PC games, one printable template at a time

https://arstechnica.com/gaming/2026/09/gog-brings-back-big-box-pc-games-one-printable-template-at...
2•Tomte•1h ago•0 comments

Learning from AI Usage Data

https://zenmux.ai/
1•patriciojimenez•1h ago•0 comments

Return YouTube Dislike recent permission changes

https://addons.mozilla.org/en-US/firefox/addon/return-youtube-dislikes/reviews/
1•impoppy•1h ago•0 comments

Don't Stack Weaknesses

https://blog.staysaasy.com/p/dont-stack-weaknesses
2•AntonZ234•1h ago•0 comments

Show HN: Estimate your AI CO2 footprint

https://llmfootprint.fyi/
3•wyre•1h ago•0 comments

Maisi – Mathematical AI Safety Institute

https://maisi.org
2•o4c•1h ago•0 comments