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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!

How Utahns Took on Mr. Wonderful and a Data Center on the Great Salt Lake

https://www.nytimes.com/2026/06/14/us/elections/kevin-oleary-utah-data-center.html
1•ChrisArchitect•3m ago•1 comments

American capitalism is run by millionaires, not billionaires

https://www.economist.com/business/2026/06/10/american-capitalism-is-run-by-millionaires-not-bill...
2•Anon84•4m ago•0 comments

A live ledger of things people wish existed captured from the BlueSky firehose

https://www.unbuilt.so
1•plural•10m ago•0 comments

Why Software, Not Drones, Will Decide the Next War

https://csis-website-prod.s3.amazonaws.com/s3fs-public/2026-06/260610_Bondar_Defining_Autonomy.pd...
1•tow21•10m ago•1 comments

Ask HN: If 160M Americans are employed, what's the unemployment rate?

1•paganartifact•14m ago•2 comments

Everyone Was Wrong About Maximum Siphon Height [video]

https://www.youtube.com/watch?v=5glksNTKkZI
1•thunderbong•19m ago•0 comments

Why my book can be downloaded for free (2014)

https://blog.plover.com/book/free-hop.html
1•downbad_•19m ago•0 comments

Show HN: Afterburner – Capability-Sandboxed JavaScript/TS Runtime in Rust

https://github.com/afterburner-sh/afterburner
1•vertexclique•21m ago•0 comments

Claude Fable 5 vs. GPT-5.5: better planning, similar execution

https://blog.kilo.ai/p/claude-fable-5-vs-gpt-5-5
2•justiceforsaas•22m ago•0 comments

AI is revolutionising the stock market

https://www.ft.com/content/b31f1e09-5aae-4cad-af15-97adb15dba70
1•thm•23m ago•0 comments

Meta‑Attention Is All You Need

https://medium.com/@vla3728419/meta-attention-is-all-you-need-650a90832d27
1•theorchid•23m ago•0 comments

Qwen 3.6 93B with MTP on 2×RTX 3090 NVLink=187 tokens/SEC,LLM lost bleat-a-thon

https://github.com/Augmented-Reality-Virtual-Reality-AR-VR/P...
3•devilfileprong•24m ago•0 comments

How did Atari apply side art to Arcade Cabinets?

https://arcadeblogger.com/2026/06/14/how-did-atari-apply-side-art-to-arcade-cabinets/
3•msephton•25m ago•0 comments

A text-first social network – No Images, No Videos

https://trendter.com/
1•badz•27m ago•1 comments

Moving Averages (2022)

https://gregorygundersen.com/blog/2022/06/04/moving-averages/
1•tosh•28m ago•0 comments

Shoehorning Flying Toasters into a ESP32-S3

https://taoofmac.com/space/blog/2026/06/14/1400
2•rcarmo•29m ago•0 comments

Brief Notes on Computer Word and Byte Sizes

https://www.cs.columbia.edu/~smb/blog/2023-03/2023-03-07.html
2•jruohonen•30m ago•0 comments

Why Rust does not need OOP

https://belderbos.dev/blog/why-rust-does-not-need-oop/
1•lumpa•31m ago•0 comments

The origins of the AI age /s

https://indiekartik.substack.com/p/the-origins-of-the-ai-age
1•kartik0001•35m ago•0 comments

I built a zero-tab reading workflow for Hacker News

https://gopeek-lovat.vercel.app/blog-hacker-news-workflow.html
5•ofcyes•42m ago•1 comments

The Birth and Death of JavaScript (2014)

https://www.destroyallsoftware.com/talks/the-birth-and-death-of-javascript
33•subset•44m ago•10 comments

China's universities cut 12,000 'obsolete' degrees

https://www.scmp.com/economy/china-economy/article/3356913/chinas-universities-cut-12000-obsolete...
3•the-mitr•44m ago•0 comments

Elon Musk's role was 'instrumental' in the Belfast riots, researchers say

https://www.lemonde.fr/en/international/article/2026/06/13/musk-s-role-was-instrumental-in-the-be...
5•tastyface•45m ago•1 comments

Formal Methods and the Future of Programming

https://blog.janestreet.com/formal-methods-at-jane-street-index/?from_theconsensus=1
2•eatonphil•47m ago•0 comments

The Universe Is Made of Music [video]

https://www.youtube.com/watch?v=j06DGlbwM34
1•rogmash•47m ago•0 comments

Show HN: KBlocker - Linux Productivity Hack

https://github.com/Dan-J-D/kblocker
1•dan-j-d•50m ago•0 comments

Double your Codex / Claude Code productivity and output

https://github.com/tanweai/pua
1•sturza•51m ago•0 comments

Kagi adds Hacker News conversation under links

https://imgur.com/a/S4S0vPX
2•scosman•53m ago•0 comments

Stop Monitoring AI Systems Like Web Services

https://www.newsletter.swirlai.com/p/stop-monitoring-ai-systems-like-web
3•AurimasGr•55m ago•0 comments

Bullet Trains Without Tracks

https://goodcomputer.substack.com/p/bullet-trains-without-tracks
2•d9w•56m ago•0 comments