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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!

LangChain Raises $300M to Enable Every Company to Own Its Intelligence

https://www.langchain.com/blog/series-c
1•robotswantdata•2m ago•0 comments

Thundering Herd Problem

https://en.wikipedia.org/wiki/Thundering_herd_problem
1•rzk•9m ago•0 comments

Financial Markets and Trading for Engineers [pdf]

https://quanyan8.github.io/assets/books/financial-markets-engineers.pdf
2•simonpure•9m ago•0 comments

Fitting the real Earth into Minecraft at 1:1: cubic chunks, open DEMs [video]

https://www.youtube.com/watch?v=NQNGaTGcdZQ
1•Pirut•10m ago•0 comments

Open Source Claude Dashboards

https://opendashboards.com
1•zahlekhan•10m ago•0 comments

Zoox robotaxi is now driving in Atlanta

https://zoox.com/journal/atlanta-expansion-robotaxi
1•sshah03•10m ago•0 comments

California Flood Risk Map

https://floodmap.robennals.org/
1•robotelvis•11m ago•1 comments

Feed HTML – an HTML subset for RSS readers

https://twowavesandadot.blog/feed-html-an-html-subset-for-rss-readers.html
1•speckx•11m ago•0 comments

Agent Anomaly Detection scores on benchmarks we didn't write

https://developers.googleblog.com/how-agent-anomaly-detection-scores-on-benchmarks-we-didnt-write/
1•goatley•13m ago•0 comments

NASA veteran's propellantless drive claim awaits independent verification

https://www.popularmechanics.com/science/a74399234/nasa-veteran-says-drive-needs-no-propellant-su...
2•dustfinger•13m ago•2 comments

Rattlesnakes have personalities too, to venomous effect

https://www.nature.com/articles/d41586-026-03536-8
2•titusblair•13m ago•0 comments

CRISPR therapy poised for first FDA approval to edit genes inside the body

https://www.nature.com/articles/d41586-026-03705-9
1•titusblair•14m ago•0 comments

Eliminating Nondeterminism in LLM Inference with Integer-Only Arithmetic

https://nathan.rs/posts/detllm/
3•shortlived•14m ago•0 comments

'Evanescent interactions': the surprising power of connecting with strangers

https://news.uga.edu/evanescent-interactions/
1•giuliomagnifico•15m ago•0 comments

Frankensplat – Fast browser-based 3D Gaussian Splat training

https://offlinetools.io/frankensplat/
2•rsp1984•15m ago•1 comments

Jensen Huang Resigns After Having Another Affair in Addition to the Chinese Spy

https://thezvi.substack.com/p/jensen-huang-resigns-after-having
1•paulpauper•17m ago•0 comments

Proactive Measures Against Password Breaches and Cookie Hijacking

https://slack.engineering/proactive-measures-against-password-breaches-and-cookie-hijacking/
1•birdculture•18m ago•0 comments

Professors teaching 50 courses a semester

https://calmatters.org/education/2026/11/community-college-professors-pay/
1•HR01•18m ago•0 comments

Show HN: Scenedraw – Create multiple excalidraw scenes, backed up on GDrive

https://scenedraw.app
2•indiepop12•18m ago•0 comments

Zero Data Retention Was in the Contract. Why Did Notion AI Chats Remain Stored?

https://inclinq.medium.com/zero-data-retention-was-in-the-contract-why-did-notion-ai-chats-remain...
1•inclinq•20m ago•0 comments

Microsoft Workers Call for Accountable AI

https://dash.palform.app/fill/org_0R2JXZPZ7PFWX/form_0R8K0PRYXGM71?f=fat_0R9JYW9RTDRDS&ref=vertic...
3•YeGoblynQueenne•20m ago•2 comments

Time Solved Space

https://adjacentpossible.substack.com/p/how-time-solved-space
1•rafaelc•21m ago•0 comments

At last – Cloudflare Hard billing limit feature [video]

https://www.youtube.com/watch?v=lFCwLATTxhc
1•woodylondon•21m ago•0 comments

Find AWS waste without giving anyone access to your account

https://github.com/auditaz/auditaz-cli
1•auditaz•22m ago•0 comments

Show HN: Desky – Auto Safari desktop mode for iPhone Duo when unfolded

https://apps.apple.com/sg/app/desky-desktop-mode-switching/id6833103142
2•vincentneo•22m ago•0 comments

Do not build your own CRM

https://www.lipeles.com/p/do-not-build-your-own-crm-system
1•alipeles1•22m ago•0 comments

AI Slop makes the World stop

https://luemmelsec.github.io/AI-Slop-Makes-The-World-Stop/
2•speckx•23m ago•0 comments

My Barcelona Talk on AI

https://marginalrevolution.com/marginalrevolution/2026/11/my-barcelona-talk-on-ai.html
1•paulpauper•23m ago•0 comments

The Everywhere Rent Seekers

https://marginalrevolution.com/marginalrevolution/2026/11/the-everywhere-rent-seekers.html
3•paulpauper•23m ago•0 comments

We review 4x more AI code without reading every line

https://thenewstack.io/scale-ai-code-reviews/
2•tonkkatonka•26m ago•0 comments