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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!

TuneWorks: Conversational AI analysis for Haltech ECU datalogs

https://tuneworks.ai/
1•Sharanxxxx•1m ago•0 comments

Do You Report Litter?

https://pmz1.substack.com/p/do-you-report-litter-will-it-work
1•gieksosz•1m ago•0 comments

The $2T Interest Bill

https://www.ft.com/content/4f28ef6c-f727-4d36-88a3-bbdbd13ddfbf
1•latentframe•1m ago•0 comments

The $440M Collapse of Guidepost Montessori

https://www.nytimes.com/2026/09/13/business/guidepost-montessori-higher-ground-education-ray-girn...
1•sbulaev•3m ago•0 comments

GitHub is currently experiencing an active service outage

https://www.githubstatus.com/incidents/0rn90wk115q9
1•matada_•3m ago•0 comments

Show HN: Here you can see the app Lifetrajectory with calculation,action plans

https://lifetrajectory.live/calculator/
1•Lifetrajectory•4m ago•0 comments

Revolut confirms customer data breach through fake government requests

https://techcrunch.com/2026/09/12/revolut-confirms-customer-data-breach-through-fake-government-r...
3•tdrz•10m ago•0 comments

Race-Switching the Dukes of Hazzard

https://shitpost.plover.com/d/dukes.html
1•jjgreen•13m ago•0 comments

Our Eukaryotic Moment

https://contraptions.venkateshrao.com/p/our-eukaryotic-moment
1•jger15•14m ago•0 comments

Give to AI Formulas from Charts

https://github.com/BorisYamp/plotparse
2•borisyamp•17m ago•1 comments

How to Check Traffic Fines in UAE?

1•jimmyyy•20m ago•0 comments

My First Week with GPT-6 Astra

https://www.vincentschmalbach.com/gpt-6-astra-first-week/
3•vincent_s•20m ago•0 comments

Show HN: A museum of source code, in rooms you can walk through

https://www.programmingmuseum.com
1•justbits•22m ago•0 comments

The Effect of Cold Showering on Health and Work

https://pubmed.ncbi.nlm.nih.gov/27631616/
4•AFF87•28m ago•1 comments

New 'Zuckoff' App Detects Nearby Meta Smart Glasses Amid Privacy Backlash

https://www.channelnews.com.au/new-zuckoff-app-detects-nearby-meta-smart-glasses-amid-privacy-bac...
3•firstordefault•30m ago•0 comments

How to Build a Custom Agent Harness

https://www.langchain.com/blog/how-to-build-a-custom-agent-harness
1•porridgeraisin•35m ago•0 comments

Future Regret in Artichoke's State Refactor

https://github.com/lopopolo/harness-engineering/blob/v1.0.0/evals/artichoke-state-modeling.md
2•Bluestein•43m ago•0 comments

My Journey Towards Coding Agents: Building Sera

https://timdettmers.com/2026/01/27/building-open-coding-agent-sera/
1•vismit2000•48m ago•0 comments

MCP Server for reduce use of Token

https://github.com/dangranaz/nxm-memory
1•dangranaz•50m ago•1 comments

Show HN: STXT, indentation-based format with schemas and no escape characters

https://stxt.dev/
1•mombiela•50m ago•0 comments

Ten years of AI reporting ("60 Minutes" Marathon) [video]

https://www.youtube.com/watch?v=QdK-j7SYh4A
1•mdp2021•50m ago•1 comments

AI Ethics or Dog Whistling?

https://buttondown.com/usaa.ma/archive/ai-ethics-or-dog-whistling/
1•usamasulaiman•52m ago•0 comments

9/11 survivors are being diagnosed with cancer 25 years after the attacks [video]

https://www.youtube.com/watch?v=gKEly6Vs3MU
2•mgh2•54m ago•0 comments

Lawyer used fake AI cases to defend himself at tribunal and it didn't end well

https://www.legalcheek.com/2026/09/lawyer-used-fake-ai-cases-to-defend-himself-at-disciplinary-tr...
1•ColinWright•54m ago•0 comments

AIs as Modern Genies

https://www.schneier.com/blog/archives/2026/09/ais-as-modern-genies.html
1•Bluestein•58m ago•0 comments

Standupd, a Letterboxd for stand-up comedy

https://standupd.com/
1•alpkorpe•59m ago•0 comments

Norton Neo Browser

https://neobrowser.ai/
13•phantomathkg•1h ago•7 comments

Musk's secretive backer builds $40B SpaceX stake

https://www.ft.com/content/c765f312-e698-4d31-bf71-f64a656ad6f4
4•sbulaev•1h ago•1 comments

GP data added to Palantir's NHS data platform

https://www.ft.com/content/5d15de64-49cc-4b6a-a2ea-51061f1cddc7
3•sbulaev•1h ago•0 comments

Show HN: Nearby places ranked by quality score, not ads

https://realnear.app/
1•stdcall83•1h ago•0 comments