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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•7mo 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!

Ghostly solar neutrinos caught transforming carbon atoms deep underground

https://phys.org/news/2025-12-ghostly-solar-neutrinos-caught-carbon.html
1•wglb•2m ago•1 comments

Using extended attributes to tag files

https://alexlance.blog/tagging.html
1•alance•3m ago•1 comments

Japan's Economic Miracle [video]

https://www.youtube.com/watch?v=vOTgi8PniA8
1•mgh2•3m ago•0 comments

Brain-Inspired LLM Alignment

https://docs.google.com/forms/d/e/1FAIpQLSc6vmem8-XfhVkMde3PCyysAS_bwBImk3H9iJo0S1OsqfUHWg/closed...
1•aoeuid•5m ago•1 comments

Tourists to US would have to reveal 5 years of social media activity under plan

https://www.theguardian.com/us-news/2025/dec/10/tourists-social-media-trump
3•teleforce•6m ago•0 comments

NASA just lost contact with a Mars orbiter, and will soon lose another one

https://arstechnica.com/space/2025/12/nasa-just-lost-contact-with-a-mars-orbiter-and-will-soon-lo...
2•pseudolus•6m ago•0 comments

Searchable Bronze Age site database could help understand ancient Anatolia

https://phys.org/news/2025-12-searchable-bronze-age-site-database.html
2•wglb•15m ago•1 comments

Linux 6.18: All About the New Long-Term Support Linux Kernel

https://thenewstack.io/linux-6-18-all-about-the-new-long-term-support-linux-kernel/
2•CrankyBear•16m ago•0 comments

Show HN: Unreal Blueprint-Like MCP Server Builder (No Coding Knowledge Required)

https://github.com/PhialsBasement/GUI-MCP
1•Phiality•16m ago•0 comments

The Normalization of Deviance in AI

https://embracethered.com/blog/posts/2025/the-normalization-of-deviance-in-ai/
2•vismit2000•16m ago•0 comments

Tumbleweed aerodynamics inspire hybrid robots for harsh terrains

https://techxplore.com/news/2025-12-tumbleweed-aerodynamics-hybrid-robots-harsh.html
1•wglb•18m ago•1 comments

Navy, Palantir Announce $448M 'Ship OS' AI Tool for Shipbuilding and Repair

https://news.usni.org/2025/12/09/navy-palantir-announce-448m-ship-os-ai-tool-for-shipbuilding-and...
1•mhb•19m ago•0 comments

Instacart's AI-enabled pricing may bump up your grocery costs by as much as 23%

https://www.cbsnews.com/news/instacart-price-discrepancies-investigation/
2•pseudolus•21m ago•2 comments

Concord – an offline-first cognitive engine that runs on your computer

https://github.com/ryttps94jq-gif/Concord-web-mvp
1•dutchtropez•22m ago•1 comments

ICE is using smartwatches to track pregnant women, even during labor

https://www.theguardian.com/technology/2025/dec/10/ice-tracking-pregnant-women
4•c420•23m ago•2 comments

Upload a selfie and get beautiful AI Santa photos for $9.99

https://www.photojing.com/products/santa-photos
1•purnimah•24m ago•0 comments

Show HN: I built a "time machine" with Gemini 3

https://chronolens.world/
1•bosschow•26m ago•0 comments

SEO poisoning with legit AI chats delivers AMOS stealer

https://www.huntress.com/blog/amos-stealer-chatgpt-grok-ai-trust
1•Elliott-Diy•27m ago•0 comments

A psychedelic tour of Earth's ecosystems–from the desert to Siberia

https://theconversation.com/a-psychedelic-tour-of-earths-ecosystems-from-the-desert-to-siberia-26...
1•PaulHoule•29m ago•0 comments

Contextify

https://contextify.sh/
1•handfuloflight•31m ago•0 comments

Show HN: MechanicsDSL – PhPhysics simulations with LaTeX-like syntax in Python

https://github.com/MechanicsDSL/mechanicsdsl
1•Guilo78•31m ago•0 comments

Show HN: Enact – NPM for AI Tools with Sigstore and Dagger

https://enact.tools
1•kgroves88•36m ago•0 comments

I Reverse Engineered ChatGPT's Memory System, and Here's What I Found

https://manthanguptaa.in/posts/chatgpt_memory/
1•misonic•36m ago•0 comments

Operation Bluebird wants to relaunch "Twitter"

https://arstechnica.com/information-technology/2025/12/can-twitter-fly-again-startup-wants-to-pry...
2•keyle•37m ago•0 comments

Attention Economy

https://studium.dev/notes/attention-economy
1•jerlendds•37m ago•0 comments

Ice Breaker Game for Any Occasion

https://icebreakergames.club/games/
1•Luki1234•38m ago•0 comments

Ask HN: What high-effort, high-reward skills have you developed in 2025?

2•Hixon10•38m ago•0 comments

Mercedes-Benz CLA Went 434 Miles in Our Real-World Test

https://www.edmunds.com/car-news/2026-mercedes-benz-cla-ev-range-charging-test-feature.html
1•pilingual•46m ago•0 comments

NASA Teams Work Maven Spacecraft Signal Loss

https://science.nasa.gov/blogs/maven/2025/12/09/nasa-teams-work-maven-spacecraft-signal-loss/
1•1970-01-01•48m ago•0 comments

Flowdrop – Build automations by chatting, no code needed

https://flowdrop.xyz
1•webbuidlr•48m ago•1 comments