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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!

India's 'Cockroach' Protesters Declare Rare Victory over Government

https://www.nytimes.com/2026/07/25/world/asia/india-education-minister-resigns-cockroach-protests...
1•thunderbong•57s ago•0 comments

We built the new fastest API for GLM-5.2

https://www.baseten.co/blog/how-we-built-the-new-fastest-api-for-glm-52/
1•philipkiely•1m ago•0 comments

Show HN: Raise a virtual pet with your friend/partner

https://dandan.schols.io
1•chaidhat•9m ago•0 comments

Google ignored my site for 13 weeks, so I audited everyone who outranks me

https://getqrcodepro.com/blog/google-ranking-evidence
1•benbuilds•17m ago•0 comments

An ESP32 based plane radar for my desk

https://blog.ktz.me/esp32-plane-radar/
1•alexktz•17m ago•0 comments

Lessons from Building My Own Products as a Freelance Engineer

https://www.mazin.sd/blog/lessons-from-building-my-own-products-as-a-freelance-engineer
1•maz225•18m ago•0 comments

Four Proposals to Improve Fuel Economy Standards (2021)

https://epic.uchicago.edu/area-of-focus/four-proposals-to-improve-fuel-economy-standards/
1•bariumbitmap•21m ago•0 comments

Show HN: Rules that stop AI coding agents from breaking working code

https://github.com/avenna01-ceo/claude-code-survival-kr
1•gaiinmaster•22m ago•0 comments

Show HN: I enhanced the UX for TemplatesOn, what do you think?

https://templateson.com
1•maz225•29m ago•0 comments

Multiple LLMs trying to reach a consensus

https://trekhleb.dev/blog/2026/yesbrainer/
1•trekhleb•30m ago•0 comments

Show HN: I mapped every US golf course – 18k courses, free, no signup

https://golfcoursebrowser.com/
3•rickmf•30m ago•0 comments

What Colorado consumers should know about the cyclospora outbreak

https://source.colostate.edu/cyclospora-outbreak-safety-symptoms/
1•mooreds•30m ago•0 comments

Ajay Kumar on running MCP in production [audio]

https://www.getreadyforagents.com/podcast/ajay-kumar-mcp-in-production-ediy/
1•mooreds•31m ago•0 comments

When You Build the Wrong Thing

https://remotesynthesis.com/posts/when-you-build-the-wrong-thing/
2•mooreds•33m ago•0 comments

Show HN: What 180k words look like as a temporal knowledge graph (Oz series)

https://synaptale.com/graph?ch=100
2•ald0r•34m ago•0 comments

Do People Swallow 8 Spiders a Year While They Sleep? (2014)

https://www.scientificamerican.com/article/fact-or-fiction-people-swallow-8-spiders-a-year-while-...
1•thunderbong•37m ago•0 comments

How Many Bits Can an Adapter Write? Capacity and Memorization of LoRA

https://arxiv.org/abs/2607.21351
1•sbulaev•45m ago•0 comments

Dartmouth Workshop on Artificial Intelligence (1956)

https://en.wikipedia.org/wiki/Dartmouth_workshop
1•d_silin•50m ago•0 comments

1209X Agentic Engineering

https://twitter.com/psdimov/status/2081179527884034259
2•pdcd•50m ago•0 comments

Sally the Robot Was Coming to a New York School. Then the Plug Was Pulled

https://www.nytimes.com/2026/07/25/nyregion/robot-school-new-york-salamanca.html
2•apparent•52m ago•1 comments

Show HN: Fitter – declarative web-data extraction,running in the browser also

https://pxyup.github.io/fitter/
3•pyxru•54m ago•1 comments

NYU Stern pricing expert: The hidden 'AI tax' hitting your next phone

https://fortune.com/2026/07/24/apple-ai-memory-chip-price-increases/
2•1vuio0pswjnm7•1h ago•0 comments

Show HN: ZWPlayer – Free player with interactive annotations and subtitle search

https://www.zwplayer.com/
2•logicplayer•1h ago•0 comments

Scottish tax hike for high earners backfires with loss of £22M

https://www.thetimes.com/uk/scotland/article/scottish-tax-high-earners-22m-3sb2k3wns
3•ivewonyoung•1h ago•0 comments

The hidden cost of AI: Why your town is negotiating with Amazon and Microsoft

https://fortune.com/2026/07/23/hobart-amazon-data-center-community-benefits/
1•1vuio0pswjnm7•1h ago•0 comments

An automated website audit tool using Gemini and n8n

https://www.aiwebsitecritic.com/
1•brayden_jones•1h ago•0 comments

Alien World Chemistry Found Inside Meteorite That Struck New Jersey Home

https://www.seti.org/news/alien-world-chemistry-found-inside-meteorite/
1•spzx•1h ago•0 comments

Space Oddity; Review of Slobodian and Tarnoff's "Muskism"

https://www.nybooks.com/articles/2026/07/23/space-oddity-muskism-slobodian-tarnoff/
1•1vuio0pswjnm7•1h ago•0 comments

AI Can Now Design Drugs in Seconds; We Still Can't Tell You If They Work

https://philippdubach.com/posts/ai-can-now-design-drugs-in-seconds-we-still-cant-tell-you-if-they...
1•TEHERET•1h ago•0 comments

Forer Effect

https://www.skepdic.com/forer.html
2•8organicbits•1h ago•0 comments