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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•8mo 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!

Show HN: Webhook Debugger – OS Alternative to RequestBin with Replay,SSRF Checks

https://apify.com/ar27111994/webhook-debugger-logger
1•ar27111994•20s ago•0 comments

Millions of Audio Devices Need a Patch to Prevent Wireless Hacking and Tracking

https://www.wired.com/story/google-fast-pair-bluetooth-audio-accessories-vulnerability-patches/
1•erhuve•1m ago•0 comments

Continuous agents and what happens after Ralph Wiggum?

1•waynenilsen•3m ago•0 comments

Thoughts on Artificial Intelligence

https://tsev.dev/posts/2026-01-13-artificial-intelligence/
1•speckx•4m ago•0 comments

A Practical 6D Pose Estimation Pipeline for High-Mix Manufacturing

https://medium.com/@telekinesis-ai/a-practical-6d-pose-estimation-pipeline-for-high-mix-manufactu...
1•CCB-TK•4m ago•1 comments

Ratio App: Accessibility Color Contrast Checker for macOS

https://ratioapp.markwyner.com/
1•robin_reala•5m ago•0 comments

Pitch Practice

https://pitch-lab.app/
2•atijke•6m ago•1 comments

US regulator tells GM to hit the brakes on customer tracking

https://www.theregister.com/2026/01/15/ftc_gm_tracking_ban/
1•beardyw•7m ago•0 comments

Geo Is Unreliable for Agentic Commerce Brand Protection, Insider Warns

https://fortune.com/2026/01/13/agentic-commerce-generative-engine-optimization-geo-unreliable-aiv...
1•tsazan•7m ago•0 comments

From Airbnb to the White House: Joe Gebbia Is Reshaping Government

https://www.fastcompany.com/91458973/chief-design-officer-joe-gebbia-reshaping-the-government
1•scroot•8m ago•0 comments

Is Greenland USA?

https://isgreenlandusa.com/
3•Javimoya•12m ago•1 comments

Research Papers Defining the SLM Revolution

https://neurometric.substack.com/p/the-small-model-revolution-5-papers
1•robmay•15m ago•0 comments

What's Next for Prediction Markets?

https://apps.apple.com/us/app/gamestock-trading-tournaments/id6751907522
1•amistico•15m ago•2 comments

SEO Question: How to Improve Click-Through-Rate(CTR)?

1•dabojula•15m ago•0 comments

Adaptive Cards – inject your actionable content directly into MS apps

https://adaptivecards.io/
1•smartmic•16m ago•0 comments

Is Fast Charging Killing the Battery? A 2-Year Test on 40 Phones [video]

https://www.youtube.com/watch?v=kLS5Cg_yNdM
1•teekert•16m ago•0 comments

I Cut My Docker Image by 99.7% (846MB to 2.5MB). Here Is the Full Breakdown

https://www.hexplain.space/blog/42ZscpWSpYhH1vIhfMIY
4•thunderbong•19m ago•0 comments

Founding Engineer| Pet Care Market Place| Feline Tails

1•vcastant•19m ago•0 comments

Rockstar Launches Official User-Generated Content Marketplace for Mods

https://www.ign.com/articles/rockstar-launches-official-user-generated-content-marketplace-for-mods
1•_____k•19m ago•0 comments

Building Docfind: Fast Client-Side Search with Rust and WebAssembly

https://code.visualstudio.com/blogs/2026/01/15/docfind
2•joaomoreno•20m ago•0 comments

Iterative image reconstruction using random cubic bézier strokes

https://tangled.org/luthenwald.tngl.sh/splined
1•luthenwald•21m ago•0 comments

Show HN: Pawnch – Addicitve chess puzzles with explanations

https://puzzle-crush.vercel.app/
1•galgia•21m ago•0 comments

Show HN: I, AI – A story about AI

https://antjanus.com/ai/stories/spare-cycles
1•antjanus•21m ago•0 comments

Founding Engineer| Pet Care Market Place| Feline Tails

1•vcastant•21m ago•0 comments

AWS Launches AWS European Sovereign Cloud and Announces Expansion Across Europe

https://www.pap.pl/mediaroom/aws-launches-aws-european-sovereign-cloud-and-announces-expansion-ac...
1•_____k•22m ago•0 comments

Best Practices for AI-Assisted Coding with Claude Code and Building Claude.md

https://antjanus.com/ai/claude-code-best-practices
2•antjanus•22m ago•0 comments

Mole: Deep clean and optimize your Mac

https://github.com/tw93/Mole
3•trueduke•22m ago•0 comments

I crawled 1,500 sites: 30% block AI bots, 0.2% use llms.txt

https://websiteaiscore.com/blog/case-study-1500-websites-ai-readability-audit
2•aggeeinn•22m ago•1 comments

Mahmood has no confidence in police chief after Israeli fan ban

https://www.bbc.co.uk/news/articles/cvgn984j9d7o
1•Delphiza•23m ago•1 comments

AWS flips switch on Euro cloud as customers fret about digital sovereignty

https://www.theregister.com/2026/01/15/aws_european_sovereign_cloud/
1•Bender•23m ago•0 comments