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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!

The Doorman's Fallacy in Action

https://rozumem.xyz/posts/17
1•rozumem•3m ago•0 comments

Feds deny Polestar authorization to sell cars in US from model year 2027

https://arstechnica.com/cars/2026/06/feds-deny-polestar-authorization-to-sell-cars-in-us-from-mod...
1•Quinner•3m ago•0 comments

Why we're choosing stewardship over an exit – Thoughtbot

https://thoughtbot.com/blog/why-we-re-choosing-stewardship-over-an-exit
1•FrancoisBosun•4m ago•0 comments

"My dad is Li Gang" incident ("我爸是李刚"案)

https://en.wikipedia.org/wiki/Li_Gang_incident
1•firefax•4m ago•0 comments

Show HN: Omnigraph - object-storage native graph engine with git-style workflows

https://github.com/modernrelay/omnigraph
1•ragnor•4m ago•0 comments

Scaling Rails at Aura Frames: Splitting to 8 Primary DBs

https://andyatkinson.com/how-aura-frames-scales-for-peak-load-ruby-on-rails
1•chao-•5m ago•0 comments

Show HN: Polygraph – Let AI agents see cross repo and maintain session memory

https://trypolygraph.com/
3•jeffbcross•5m ago•0 comments

Cornell Recovered $100k in Unidentified Payments with AI

https://innovationhub.ai.cornell.edu/articles/how-cornell-recovered-100000-in-unidentified-paymen...
2•simonpure•6m ago•0 comments

Russia's plan to drill superdeep revives controversial theory of 'endless oil'

https://www.science.org/content/article/russia-s-plan-drill-superdeep-holes-arctic-revives-contro...
2•Kaibeezy•7m ago•0 comments

Show HN: I built an Ad-free Pinterest Alternative with AI content filtering

https://moodloom.xyz
1•akshat368•9m ago•1 comments

Trying to recover from thin content penalty from Google

2•anitroves•10m ago•2 comments

Idler Magazine

https://www.idler.co.uk/
1•tomjakubowski•10m ago•0 comments

AI Surveillance: Age Verification Meets Your Chat Logs

https://techtrenches.dev/p/the-cost-of-reading-everyone-just
1•pavel_lishin•11m ago•0 comments

Staying Awake (2008)

https://harpers.org/archive/2008/02/staying-awake/
1•NaOH•12m ago•0 comments

The easy way to build your own App and SaaS Analytics Dashboard, without SDKs

https://nerdsip.com/blog/how-to-build-your-own-app-analytics
1•wrangeliese•13m ago•0 comments

Indian Political Simulation web based game

https://political-sim-mu.vercel.app
1•Supratik090•13m ago•0 comments

Multi agent systems for complex tasks

https://lexifina.com/blog/multi-agent-systems-for-complex-tasks
1•alansaber•14m ago•0 comments

Structured Primary Keys

https://modern-sql.com/blog/2026-06/structured-primary-keys
1•chmaynard•15m ago•0 comments

Trailing Dots Are the Worst

https://daniel.haxx.se/blog/2026/06/25/trailing-dots-are-the-worst/
3•chmaynard•17m ago•0 comments

Scrutineer: Scanning open source without flooding maintainers

https://nesbitt.io/2026/06/25/scrutineer.html
1•chmaynard•18m ago•0 comments

Inaccurate diagnostic error displayed to all BMW i4 owners

https://www.i4talk.com/threads/replace-battery-error-today-june-24-common-issue.15861/
1•JojoFatsani•18m ago•0 comments

Applied AI Implementation Engineer Freelance

3•awongsem•20m ago•0 comments

Hours of Humanoid Teleop, Recorded in Real Homes

https://topicqueue.substack.com/p/500-hours-of-humanoid-teleop-recorded
3•DISCURSIVE•22m ago•0 comments

NewsOnScale

https://www.newsonscale.com/
2•AMILLI_AI_CORP•22m ago•0 comments

Achieving Host and MicroVM Density Using Erofs

https://spacescale.io/blog/achieving-host-and-microvm-density-using-erofs/
2•tobiogundiyan•23m ago•0 comments

AI Is Designing Radio Chips That Humans Couldn't Even Imagine

https://spectrum.ieee.org/ai-radio-chip-design
6•pseudolus•24m ago•0 comments

Show HN: OnBuzz – an open-source workspace for AI agent teams

https://github.com/Loxia-ai/onbuzz-community
2•Dantlv•26m ago•1 comments

Study: Governed AI retrieval – 97% pass rate, 67% fewer tokens (Emory, IBM)

https://promptowl.ai/resources/verifiable-context-governance/
2•sparkystacey•28m ago•1 comments

Show HN: OpenPhone – new open source, customized AI-native Android OS

https://github.com/secondly-com/openphone
2•talboren•30m ago•0 comments

Cargo thieves are following the AI boom

https://www.freightwaves.com/news/cargo-thieves-are-following-the-ai-boom
3•crescit_eundo•32m ago•0 comments