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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•11mo 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!

How Oregon's Data Center Boom Is Supercharging a Water Crisis

https://waterwatch.org/how-oregons-data-center-boom-is-supercharging-a-water-crisis/
1•therobots927•1m ago•0 comments

Palantir Comes to Campus

https://nymag.com/intelligencer/article/palantir-yale-conference-ai.html
1•jbegley•2m ago•0 comments

Shitpostmodernism: Understanding the Slopgeneration

https://www.spikeartmagazine.com/articles/essay-shitpostmodernism
1•thinkingemote•2m ago•0 comments

AI Agents Are the Mass-Produced Cars of Software

https://telegraphic.substack.com/p/ai-agents-are-the-mass-produced-cars
1•telegrahi•2m ago•0 comments

Opioid maker Purdue Pharma shuts down as part of $7.4B deal

https://www.usatoday.com/story/news/nation/2026/05/01/purdue-pharma-shuts-down-opioid-crisis-oxyc...
1•geox•4m ago•0 comments

Disneyland Now Uses Face Recognition on Visitors

https://www.wired.com/story/security-news-this-week-disneyland-now-uses-face-recognition-on-visit...
2•Brajeshwar•8m ago•0 comments

Digital Ecosystems: Interactive Multi-Agent Neural Cellular Automata

https://pub.sakana.ai/digital-ecosystem/
1•jarmitage•10m ago•0 comments

How are Life-Size Figures Created at hololive production?

https://coveredge.cover-corp.com/en/list/4759
1•ai_slop_hater•10m ago•0 comments

Vibecoded my dream game, GeoGuesser for guns, now its helping with student bills

https://gunguesser.com
4•salad_vr•11m ago•5 comments

The Railway and the Balloon

https://netwars.pelicancrossing.net/2026/05/01/the-railway-and-the-balloon/
1•ColinWright•15m ago•0 comments

Floating Armoury

https://en.wikipedia.org/wiki/Floating_armoury
1•jjmarr•17m ago•0 comments

Customizing Claude Code spinner verbs

https://www.augmentedswe.com/p/customizing-claude-code-spinner-verbs
1•wordsaboutcode•17m ago•0 comments

Back end-for-Front end: The most secure architecture for browser-based apps

https://fusionauth.io/blog/backend-for-frontend-security-architecture
2•mooreds•22m ago•0 comments

Voyager and the Art of Graceful Degradation

https://www.flyingbarron.com/2026/04/voyager-and-art-of-graceful-degradation.html
1•mooreds•22m ago•0 comments

Did I photograph the Aurora or was it something else? (2016)

https://wp.lancs.ac.uk/aurorawatchuk/2016/03/16/did-i-photgraph-the-aurora-or-was-it-something-else/
1•susam•24m ago•0 comments

Upcoming Blender Development Fund and AI Policies

https://www.blender.org/news/upcoming-blender-development-fund-and-ai-policies/
2•sensanaty•25m ago•0 comments

The Annoying Usefulness of Emacs [video]

https://www.youtube.com/watch?v=DMbrNhx2zWQ
2•susam•25m ago•0 comments

The Sky Tonight

https://theskylive.com/guide
2•susam•27m ago•0 comments

New US phone network for Christians to block porn and gender-related content

https://www.technologyreview.com/2026/05/01/1136739/a-new-t-mobile-network-for-christians-aims-to...
5•thinkingemote•30m ago•2 comments

Making Your Writing Work Harder for You

https://training.kalzumeus.com/newsletters/archive/content-marketing-strategy
2•eigenBasis•32m ago•0 comments

Show HN: TradingAgents without the API bill – run multi agents in Claude Code

https://github.com/lucemia/trading-agents-plugin
1•lucemia51•36m ago•0 comments

Stop Supplying. Start Owning

https://allensthoughts.com/2026/05/01/stop-supplying-start-owning/
2•herbertl•37m ago•0 comments

Uber wants to turn its drivers into a sensor grid for AV companies

https://techcrunch.com/2026/05/01/uber-wants-to-turn-its-millions-of-drivers-into-a-sensor-grid-f...
3•nickvec•38m ago•0 comments

Zugzwang

https://en.wikipedia.org/wiki/Zugzwang
24•Qem•42m ago•4 comments

If Claude writes the code, what makes me still a developer?

https://betweentheprompts.com/if-claude-writes-the-code/
4•scastiel•45m ago•0 comments

Santa Cruz restaurant changes logo after flurry of negative reviews for AI art

https://www.sfgate.com/food/article/santa-cruz-restaurant-ai-21955920.php
5•randycupertino•46m ago•3 comments

LLMs consistently pick resumes they generate over ones by humans or other models

https://arxiv.org/abs/2509.00462
85•laurex•48m ago•48 comments

Domination: A contrarian view of AI risk (2024)

https://matthewbutterick.com/chron/domination.html
2•vermilingua•57m ago•0 comments

I moved my blog from Jekyll to Emacs Lisp

https://martinsos.com/posts/my-blog-in-elisp
2•Martinsos•59m ago•1 comments

The History of Lipstick

https://www.saturdayeveningpost.com/2026/04/common-threads-the-history-of-lipstick/
2•ohjeez•1h ago•0 comments