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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•10mo 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!

Show HN: Event photo matching with badge markers, no face scanning

https://pictag.io
1•gtpoxa•2m ago•0 comments

What Every Security Engineer Should Learn from Star Trek

https://shostack.org/blog/devsecops-learn-from-star-trek/
1•worik•3m ago•0 comments

How Steve Jobs Brought the Apple II to the Classroom

https://hackeducation.com/2015/02/25/kids-cant-wait-apple
1•rbanffy•3m ago•0 comments

'Fatal decision': EU slammed for caving to US pressure on digital rules

https://www.politico.eu/article/fatal-decision-eu-slammed-for-caving-to-us-pressure-on-digital-ru...
1•nickslaughter02•3m ago•0 comments

China's AI Education Experiment

https://www.chinatalk.media/p/chinas-ai-education-experiment
1•pseudolus•8m ago•0 comments

R/programming on Reddit just banned all content related to AI LLMs

https://www.tomshardware.com/tech-industry/artificial-intelligence/the-largest-programming-commun...
1•speckx•9m ago•0 comments

GraalVM and Java and Native Images, compile Java to standalone executables

https://www.graalvm.org/latest/reference-manual/native-image/
2•gigatexal•11m ago•0 comments

Ruby on Rails and SQLite3: fix for silent data loss on column rename or removal

https://github.com/rails/rails/pull/57128
1•eummm•11m ago•0 comments

The Vibecoders Are Coming For Us

https://coz.is/posts/vibecoders_are_coming_for_us.html
2•cozis•11m ago•0 comments

AI Baby Dance Video Generator: Turn Baby Photos into Dancing Videos

https://seaimagine.com/ai-baby-dance-video-generator/
1•taynes•14m ago•0 comments

International law experts allege violations in Iran war

https://www.bbc.co.uk/news/articles/cy91x2n29nlo
1•only_in_america•15m ago•0 comments

SpaceX Files FCC Complaint over Ariane 64 Amazon Leo Launch

https://europeanspaceflight.com/spacex-files-fcc-complaint-over-ariane-64-amazon-leo-launch/
1•lysace•16m ago•0 comments

Europe's AI sovereignty just became a security emergency

https://www.euractiv.com/opinion/europes-ai-sovereignty-just-became-a-security-emergency/
1•vrganj•19m ago•0 comments

RiskReady-open-source GRC platform with MCP gateway and human-approved mutations

https://github.com/riskreadyeu/riskready-community
1•danielminda7•22m ago•0 comments

We're Addicted to Our Devices

https://type-writer.org/?p=7369
1•speckx•24m ago•0 comments

The "Passive Income" trap ate a generation of entrepreneurs

https://www.joanwestenberg.com/the-passive-income-trap-ate-a-generation-of-entrepreneurs/
1•jotaen•24m ago•0 comments

Show HN: LLMnesia – search across ChatGPT, Claude, Gemini chats locally

https://chromewebstore.google.com/detail/llmnesia/leekfgbdojiaabifbjbbgiiclannjdkf
3•keiranflynn•24m ago•2 comments

From Hierarchy to Intelligence

https://block.xyz/inside/from-hierarchy-to-intelligence
1•gpi•28m ago•0 comments

The feet don't rotate with the body

https://en.wikipedia.org/w/extensions/WP25EasterEggs/resources/media/video/outerspace-idle-light....
4•ColinWright•33m ago•0 comments

Atmospheric CO₂ accelerating faster than fossil fuel emissions are growing

https://bsky.app/profile/thierryaaron.bsky.social/post/3mil6lnsrqc26
3•mariuz•35m ago•0 comments

From Reversibility to Irreversibility: Biggest shift in the history of physics

https://chillphysicsenjoyer.substack.com/p/from-reversibility-to-irreversibility
1•crescit_eundo•36m ago•0 comments

Running Qwen 35B on 16GB Mac Mini via MMAP (17 tok/s) then swapping to Gemma 4

https://thoughts.jock.pl/p/local-llm-35b-mac-mini-gemma-swap-production-2026
2•joozio•38m ago•0 comments

Funny Quotes Radar

https://gagdash.com/
1•hackerbeat•38m ago•0 comments

Adobe wrote to my hosts file. I've never had an app do this before

https://old.reddit.com/r/webdev/comments/1sb6hzk/adobe_wrote_to_my_hosts_file_ive_never_had_an_app/
4•speckx•39m ago•0 comments

Zperiod: Interactive Periodic Table and Chemical Equation Balancer

https://zperiod.app/
1•thunderbong•42m ago•0 comments

Why Is It So Difficult to Develop Drugs for Cancer? (2010)

https://www.newyorker.com/magazine/2010/05/17/the-treatment-2
2•downbad_•43m ago•1 comments

Mercor, a $10B AI startup confirms major data breach

https://fortune.com/2026/04/02/mercor-ai-startup-security-incident-10-billion/
4•taubek•44m ago•0 comments

Kafka Options Explorer

https://kafka-options-explorer.conduktor.io/
1•enether•45m ago•1 comments

The Noble Rhubarb: Himalayan Marvel of Nature's Ingenuity

https://www.kuriositas.com/2025/05/the-noble-rhubarb-himalayan-marvel-of.html
3•marukodo•46m ago•1 comments

Chess960x32 Experimental chess platform with 30720 unique opening configurations

https://topce.github.io/chess960x32/
1•topce•52m ago•0 comments