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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!

America has lost its war with Iran

https://www.independent.co.uk/voices/editorials/america-trump-iran-ceasefire-agreement-war-hormuz...
1•testing22321•3m ago•0 comments

The Effect of the Great Recession on U.S. Fertility

https://read.dukeupress.edu/demography/article/doi/10.1215/00703370-12664250/411033/The-Effect-of...
2•paulpauper•5m ago•0 comments

Tyler Cowen Is the Tycho Brahe of Economics

https://3quarksdaily.com/3quarksdaily/2026/06/tyler-cowen-is-the-tycho-brahe-of-economics.html
1•paulpauper•6m ago•0 comments

Zen and the Art of Machine Learning Research

https://blog.jxmo.io/p/zen-and-the-art-of-machine-learning
1•jxmorris12•6m ago•0 comments

The White House Is Ratcheting Up Its War Against Anthropic

https://www.theatlantic.com/technology/2026/06/trump-anthropic-export-control-ai-race/687555/
1•Filligree•6m ago•0 comments

Ask HN: Does anyone have their PMs shipping code to customer-facing products?

2•reluctant_dev•11m ago•0 comments

Earn lending-market yield on internet dollars

https://www.askthehive.ai/
1•prismoonprismo•16m ago•0 comments

Ratchets: a Rust tool that polices style violations with a flexible budget

https://github.com/imbue-ai/ratchets
1•nvader•17m ago•0 comments

Ai2 ACE2S – Simulate atmospheric variability – Scale of days to centuries

https://huggingface.co/allenai/ACE2S-SHiELD-plus
1•embedding-shape•21m ago•0 comments

Free Full on App Opensource. This One Is an Absolute Gem Find on GitHub

https://github.com/Prithvi-Web/Treemap
1•DaGoat487•21m ago•4 comments

Amazon Announces Multibillion-Dollar Data Center in Missouri

https://www.narracomm.com/amazon-announces-multibillion-dollar-data-center-in-missouri/
2•thelonelyborg•24m ago•1 comments

How the PH1 barrel became a legend in America's craft beer scene

https://www.washingtonpost.com/food/2026/06/15/how-ph1-barrel-became-legend-america-craft-beer-sc...
1•bookofjoe•26m ago•2 comments

The US just treated an LLM as a munition

https://substack.productmind.co/p/four-thoughts-on-anthropics-fable
2•okosisi•30m ago•1 comments

DeepFork – reverse-engineer any OSS repo into a clean-room rebuild blueprint

https://github.com/GerardoRdz96/deepfork
2•gerardordz96•35m ago•1 comments

Reviews have become expensive, rewrites have become cheap

http://ishmeetbindra.com/posts/reviews-have-become-expensive-rewrites-have-become-cheap/
2•arzh2•38m ago•0 comments

Explosions in Iran IRGC Infighting over "Deal", Hezbollah Attacks Israel [video]

https://www.youtube.com/watch?v=ZehgwIxh4eA
2•Bender•39m ago•0 comments

The Org Harness

https://pub.towardsai.net/the-org-harness-edef5844ba10?source=friends_link&sk=c7ddedd34684476842b...
1•tacoda•44m ago•0 comments

Xiaomi's agentic AI coding harness MiMo Code beats Claude Code at 200 step tasks

https://venturebeat.com/technology/xiaomis-new-open-source-agentic-ai-coding-harness-mimo-code-be...
3•gmays•46m ago•0 comments

Show HN: An Information Exchange for Agents

https://callsign.sh/
1•ric2z•46m ago•5 comments

FreeBSD 15.1-Release Now Available

https://lists.freebsd.org/archives/freebsd-announce/2026-June/000274.html
1•cperciva•47m ago•0 comments

Startup supposed to revolutionize California's wine industry 'It failed'

https://www.latimes.com/business/story/2026-06-15/this-startup-was-supposed-to-revolutionize-cali...
4•iancmceachern•51m ago•0 comments

The Exe.dev iOS App

https://blog.exe.dev/ios
1•bryanmikaelian•53m ago•0 comments

As a potential bug bounty hunter need an advice from bounty hunting veterans

1•SunShineDust•54m ago•0 comments

Eight Crew Members Believed Dead in B-52 Bomber Crash at California Air Base

https://www.wsj.com/us-news/b-52-bomber-crashes-shortly-after-take-off-at-california-air-base-253...
1•fortran77•54m ago•2 comments

UK social media ban for children: the privacy problems Australia exposed

https://proton.me/blog/uk-social-media-ban-privacy
3•jethronethro•56m ago•0 comments

Continue has been acquired by Cursor

https://www.continue.dev
2•platevoltage•57m ago•3 comments

Ultracoding: The Next Frontier

https://www.jay.ai/blog/ultracoding-the-next-frontier
2•_jayhack_•59m ago•0 comments

The Productivity J-Curve [pdf]

https://ide.mit.edu/sites/default/files/publications/jcurve.pdf
1•kioku•1h ago•0 comments

Www.ander.com

https://blog.cloudflare.com/es-es/welcome-to-connectivity-cloud/
1•the-art•1h ago•0 comments

Stolen fries are spicier than justice: How covert larceny enhances taste

https://www.sciencedirect.com/science/article/abs/pii/S0950329326001126
3•gnabgib•1h ago•0 comments