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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!

Couple Stalked by eBay Settle for $56M

https://www.nytimes.com/2026/07/28/technology/ebay-settles-stalking-case.html
1•apparent•45s ago•0 comments

Is the bottleneck on AI at your company technical or organizational?

https://theworkingmodel.co/
1•aicoding•5m ago•0 comments

The U.S. economy in 2026: What to watch for

https://siepr.stanford.edu/publications/policy-brief/us-economy-2026-what-watch
1•latentframe•8m ago•0 comments

The Rise of Million-Dollar Companies with Just One Employee

https://www.wsj.com/tech/ai/the-rise-of-million-dollar-companies-with-just-one-employee-f36a77c1
2•apparent•9m ago•0 comments

Outside LLMs – Outside Lands and Codex

https://outsidellms.com/
1•sugabush•10m ago•1 comments

Global surge in copper theft snares telecoms and trains

https://www.ft.com/content/5ee7595d-a85d-432d-b269-90f1b4cf1920
1•olalonde•12m ago•0 comments

Test the Email Verification Protocol with an origin trial

https://developer.chrome.com/blog/email-verification-protocol-origin-trial
1•nreece•19m ago•0 comments

How IPTV delivery works, end to end

https://iptvproviders.online/
1•cynthial485•21m ago•0 comments

South Korea's AI Bubble Just Popped [video]

https://www.youtube.com/watch?v=hy90LdpEUvQ
1•Bender•26m ago•0 comments

I Tried to Make AI Writing Sound Human by Banning AI Words Through Logit_bias

https://www.vincentschmalbach.com/make-ai-writing-sound-human-logit-bias/
1•vincent_s•26m ago•0 comments

What's the Fewest People That Could Repopulate Earth? [video]

https://www.youtube.com/watch?v=1qIvFpcGkqc
1•gmays•27m ago•0 comments

South Korea's AI Bubble Just Popped – Now What? [video]

https://www.youtube.com/watch?v=qeXpUZTdvsI
2•Bender•28m ago•0 comments

Show HN: Free Image Merger – combine photos in-browser, nothing uploaded

https://freeimagemerger.com/
1•winsonaibuilder•29m ago•0 comments

Could the Most Radical Plane Design Since the Concorde Take on Boeing?

https://www.wsj.com/business/could-the-most-radical-plane-design-since-the-concorde-take-on-boein...
1•fortran77•31m ago•2 comments

Long-Term Data Storage for Home Users [video]

https://www.youtube.com/watch?v=ulh9z-JluBs
1•haloboy777•32m ago•0 comments

Leopold Aschenbrenner's Situational Awareness seeks capital raise after AI rout

https://www.ft.com/content/280336bf-dbed-405f-b38e-5af644a21549
3•fatcatsbestcats•32m ago•1 comments

Finding a job as a WordPress dev has become impossible

https://twitter.com/DenisBosire/status/2082523094506217765
2•jv22222•33m ago•0 comments

I built a Docker image factory in Go – 300 lines, no daemon, full OCI compliance

https://cheikhhseck.medium.com/building-a-docker-image-factory-from-scratch-in-go-e3c2e7127106
1•cheikhdev•35m ago•0 comments

Cursed Knowledge

https://www.jmduke.com/posts/cursed-knowledge.html
1•twapi•39m ago•0 comments

Surviving Dreams

https://www.survivingdreams.com/reinforcement-dreaming/
1•Aeroi•40m ago•1 comments

Why Standard Displays Often Fail in Specialized Products

https://duobond-display.com/news/custom-displays/506.html
1•Todorov•41m ago•0 comments

Matt Damon's Biceps in That 'Odyssey' Fight Scene? They're Hers

https://www.nytimes.com/2026/07/29/style/devyn-dalton-matt-damon-stuntwoman-odyssey.html
1•wslh•42m ago•1 comments

Interview with a Sysadmin in 2026 [Corporate]

https://www.youtube.com/watch?v=I7IHInNJZvE
1•vismit2000•44m ago•0 comments

"Gravity is worth asking about."

https://unsung.aresluna.org/gravity-is-worth-asking-about/
2•nozzlegear•44m ago•0 comments

I Gave Claude One Tool to Edit, Master and Transcribe All My Audio [video]

https://www.youtube.com/watch?v=xiMh3d97QtQ
1•DanHodgetts•45m ago•0 comments

Recursive Self Improvement for Coding Agents

https://cline.ghost.io/recursive-self-improvement-for-coding-agents/
1•jhack•46m ago•0 comments

Opus Dreams – chats that weren't saved

https://opusdreams.vercel.app/
1•NickNaraghi•52m ago•0 comments

The cost of memory: How organisms balance thinking and sensing

https://phys.org/news/2026-07-memory.html
2•the-mitr•55m ago•0 comments

It is past time to upgrade to post-quantum encryption

https://www.economist.com/leaders/2026/07/29/it-is-past-time-to-upgrade-to-post-quantum-encryption
1•AsyncBanana•56m ago•0 comments

Why the future is local app

https://getapps.cafe/blog/why-the-future-is-local-app
1•knlam•57m ago•0 comments