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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•11mo 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!

Ryzen Saved AMD from Bankruptcy – 10 Years of CPUs Tested [video]

https://www.youtube.com/watch?v=EZeiaK0T3Jk
2•mariuz•29s ago•0 comments

How Semiconductors Were Made in America

https://www.siliconimist.com/p/semiconductors-made-in-america
3•johncole•2m ago•1 comments

Once I Understood Where AI Is Heading, I Stopped Being Anxious About It

https://ai.gopubby.com/once-i-understood-where-ai-is-heading-i-stopped-being-anxious-about-it-849...
1•swolpers•2m ago•0 comments

Buying, Selling on eBay Disrupted Worldwide for more than 24 hours

https://www.sanjoseinside.com/business/buying-selling-on-ebay-disrupted-worldwide-for-nearly-two-...
1•j79•3m ago•1 comments

Universal Transformers Need Memory: Depth-State Trade-Offs in Adaptive Recursive

https://arxiv.org/abs/2604.21999
1•che_shr_cat•7m ago•0 comments

Show HN: Art Coding Lab – Learn Creative Coding Through Micro Challenges

https://artcodinglab.com/
1•absurdwebsite•8m ago•1 comments

GraphCompose – declarative PDF layout engine for Java (MIT)

https://github.com/DemchaAV/GraphCompose
1•demchaav•9m ago•0 comments

Show HN: I built a dating SIM that prepares you for your date

https://claude.ai/public/artifacts/98750067-546b-4c9e-ab62-68cae2941329
1•danish00111•12m ago•0 comments

Study Finds a Third of New Websites Are AI-Generated

https://www.404media.co/study-finds-a-third-of-new-websites-are-ai-generated/
2•Brajeshwar•15m ago•1 comments

GB Electricity Bills

https://www.electricitybills.uk/
2•kieranmaine•15m ago•1 comments

OpenAI Models, Codex, and Managed Agents Come to AWS

https://openai.com/index/openai-on-aws/
3•meetpateltech•15m ago•0 comments

Show HN: PastePlop – yet another Mac clipboard manager

https://bendansby.com/apps/pasteplop.html
1•webwielder2•18m ago•0 comments

Warp is now Open-Source

https://github.com/warpdotdev/warp
1•doppp•19m ago•0 comments

Nvidia Nemotron 3 Nano Omni

https://developer.nvidia.com/blog/nvidia-nemotron-3-nano-omni-powers-multimodal-agent-reasoning-i...
2•qainsights•19m ago•0 comments

Tridimensional Visualization of a Blackbird Song [video]

https://www.youtube.com/watch?v=EgWMo4BrKBs
1•vinnyglennon•20m ago•0 comments

Ask HN: What do you check before launching a web app?

1•pagelensai•20m ago•0 comments

Show HN: How to become an Anti-founder, THE MANUAL

https://manual.cochranblock.org
1•cochranblock•20m ago•0 comments

Biggest US airlines spent $1.2B more on fuel in Q1

https://sherwood.news/business/the-6-biggest-us-airlines-spent-1-2-billion-more-on-fuel-in-q1-and...
2•speckx•21m ago•0 comments

Our Uncertain Uncertainties

https://kevinkelly.substack.com/p/our-uncertain-uncertainties
2•nowflux•21m ago•0 comments

You're the Bread in the AI Sandwich

https://every.to/context-window/you-re-the-bread-in-the-ai-sandwich
2•gmays•21m ago•0 comments

The Download: Musk and Altman's legal showdown, and AI's profit problem

https://www.technologyreview.com/2026/04/28/1136479/the-download-musk-altman-openai-trial-ai-prof...
1•joozio•21m ago•0 comments

From GitHub to Codeberg/Forgejo

https://www.jonashietala.se/blog/2026/04/28/from_github_to_codebergforgejo/
1•lawn•22m ago•0 comments

Doofioso (2006)

https://scottaaronson.blog/?p=75
1•Tomte•23m ago•0 comments

Remote Code Execution on Github with a single Git push

https://twitter.com/wiz_io/status/2049153209982140718
1•ramonga•23m ago•0 comments

The Royal Game (2020)

https://codemetas.de/2020/11/22/The-Royal-Game.html
1•tosh•25m ago•0 comments

Humpback whale 'Timmy' being transported towards ocean

https://www.dw.com/en/germany-stranded-whale-timmy-being-transported-towards-ocean-in-special-bar...
1•Tomte•26m ago•0 comments

How to Acquire a Country: A Thought Experiment

https://flyingsolo.bearblog.dev/how-to-acquire-a-country/
1•ankitdce•27m ago•0 comments

SXSW Used AI-Powered Trademark Tool to Censor Dissent on Instagram

https://www.404media.co/sxsw-used-ai-powered-trademark-tool-to-censor-dissent-on-instagram/
1•cdrnsf•28m ago•0 comments

Building a Fast Multilingual OCR Model with Synthetic Data

https://huggingface.co/blog/nvidia/nemotron-ocr-v2
2•ibobev•31m ago•0 comments

DeepSeek-V4: a million-token context that agents can use

https://huggingface.co/blog/deepseekv4
2•ibobev•32m ago•0 comments