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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!

Static search trees: 40x faster than binary search (2024)

https://curiouscoding.nl/posts/static-search-tree/
1•lalitmaganti•27s ago•0 comments

China's Xi Jinping launches new AI alliance, WAICO

https://www.aljazeera.com/news/2026/7/17/chinas-xi-jinping-launches-new-ai-alliance-what-is-it
1•culi•38s ago•1 comments

Recreating the best engineering zine from the 90s

https://circazine.hackclub.com/
1•lsanchezz•1m ago•0 comments

France blocks access to Polymarket website

https://www.reuters.com/technology/french-internet-service-providers-told-block-access-polymarket...
1•1659447091•2m ago•1 comments

Ask HN: Did you try Nordstjernen Web Browser 1.0.19 yet?

2•roschdal•2m ago•0 comments

MLB restricts using dugout iPads for AI-assisted in-game strategy

https://www.espn.com/mlb/story/_/id/49385415/mlb-restricts-dugout-ipad-use-prevent-artificial-int...
1•HardwareLust•5m ago•0 comments

Linus Torvalds to critics of AI coding in Linux: "Fork it. Or just walk away."

https://arstechnica.com/ai/2026/07/linus-torvalds-to-critics-of-ai-coding-in-linux-fork-it-or-jus...
4•baal80spam•5m ago•0 comments

Google Earth Pro for desktop will no longer be available to download soon

https://www.techradar.com/computing/the-impact-to-thousands-of-companies-across-industries-will-b...
1•asoberbeck•6m ago•0 comments

Chemical Onshoring of All Kinds

https://www.science.org/content/blog-post/chemical-onshoring-all-kinds
1•EA-3167•7m ago•0 comments

CollpaseOS: Program microcontrollers through civilizational collapse

https://collapseos.org/
1•Gecko4072•7m ago•0 comments

Apple Passed Nvidia to Become Most Valuable Company Again

https://www.macrumors.com/2026/07/17/apple-passed-nvidia-most-valuable-company/
1•tosh•10m ago•0 comments

Talking Postgres: Working on Postgres After 13 Years on SQL Server

https://talkingpostgres.com/episodes/working-on-postgres-after-13-years-on-sql-server-with-panagi...
2•clairegiordano•11m ago•0 comments

Painting the sides of railroad rails white to reduce derailment

https://www.up.com/news/safety/Tracking-Rail-Heat-260608
2•zdw•12m ago•0 comments

How to Make a Triode Yourself

https://simplifier.neocities.org/triode2
1•Gecko4072•12m ago•0 comments

Show HN: Argument duello game with your friend – AI judge decides who's right

https://wram.chat
1•revolt2tech•13m ago•0 comments

Tech note: making your own V-I plots at home

https://lcamtuf.substack.com/p/tech-note-making-your-own-v-i-plots
1•zdw•15m ago•0 comments

Pre-Authentication RCE in WordPress Core

https://wp2shell.com/
3•patrikg•17m ago•0 comments

When you give a Nix Developer in charge of a website

https://twitter.com/Malix_Labs/status/2077521369663742252
2•eveeifyeve•21m ago•0 comments

We Built Sandbox Infrastructure for Autonomous Agents

https://neosigma.ai/blog/agent-workspaces
2•AdityaBilawar•22m ago•0 comments

T-Mobile's billing-system migration made free lines billable

https://arstechnica.com/tech-policy/2026/07/t-mobile-bungled-forced-plan-migration-canceling-some...
2•logickkk1•22m ago•0 comments

Cabure: Small Gitops Operator

https://github.com/GreedyKomodoDragon/cabure
1•greedykomodo•23m ago•0 comments

Automated job application system, sponsored by the American Mathematical Society

https://www.mathjobs.org/jobs
2•Eridanus2•23m ago•0 comments

Free tool to download Reddit data from community dumps

https://github.com/Tryhard-cs/reddit-download-tool
2•Tryhard3141•25m ago•0 comments

GonzoCapital – The Inside VC Stories

https://www.gonzocapital.net/confessions-of-a-compromised-capitalist/
2•robmay•25m ago•0 comments

There's no evidence that mobile phones will give you brain cancer

https://www.rnz.co.nz/life/wellbeing/no-evidence-mobile-phones-cause-brain-cancer-new-study
3•billybuckwheat•27m ago•0 comments

About the OpenSubsonic API

https://opensubsonic.netlify.app/
1•toomuchtodo•29m ago•1 comments

Tinfoil.com

https://www.tinfoil.com/default.htm
2•willmeyers•29m ago•1 comments

Flock CEO Apologizes for Calling Activists 'Terrorists'

https://www.forbes.com/sites/thomasbrewster/2026/07/17/flock-ceo-sorry-for-labelling-activists-te...
7•chaps•32m ago•2 comments

What I learned inside escape room with one of the most brilliant mathematicians

https://www.begiant.ca/stories/people/jacob-tsimerman-math
1•amichail•32m ago•0 comments

Show HN: Fluent, tiny lang for reactivity and autograd

https://mlajtos.github.io/fluent/?code=VG91cg
2•mlajtos•35m ago•0 comments