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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•12mo 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 FCC Wants Your ID Before You Get a Phone Number

https://reclaimthenet.org/the-fcc-wants-your-id-before-you-get-a-phone-number
2•delichon•3m ago•0 comments

Wanted: A new tech-industry writer for The Economist

https://www.economist.com/business/2026/05/06/wanted-a-new-tech-industry-writer
2•andsoitis•5m ago•0 comments

Refineshot: Rethink Cinematography with Foundational Skill Evaluation

https://www.techrxiv.org/doi/full/10.36227/techrxiv.176107519.98547757/v1
2•bryanrasmussen•8m ago•1 comments

GrapheneOS fixes Android VPN leak Google refused to patch

https://cyberinsider.com/grapheneos-fixes-android-vpn-leak-google-refused-to-patch/
3•Georgelemental•10m ago•0 comments

AWS to also block ipcomp and xfrm modules in DirtyFrag mitigation

https://aws.amazon.com/security/security-bulletins/rss/2026-027-aws/
1•kro•12m ago•1 comments

Rtwatch: Watch videos with friends using WebRTC

https://github.com/pion/rtwatch
1•nateb2022•12m ago•0 comments

Canvas Data Breach; DeepSeek V4 Flash Boosts LLM Inference 4.3x

https://presciente.com/edition/77
1•sebastianperezr•12m ago•0 comments

I am the best lightsaber fighter in Europe

https://www.theguardian.com/lifeandstyle/2026/may/08/experience-i-am-the-best-lightsaber-fighter-...
2•tagawa•16m ago•0 comments

Self-Fulfilling Misalignment Data Might Be Poisoning Our AI Models (2025)

https://turntrout.com/self-fulfilling-misalignment
1•herbertl•18m ago•0 comments

It Was a Good Quarter for "Other Income" [A16Z Charts on AI Growth]

https://www.a16z.news/p/charts-of-the-week-it-was-a-good
1•alecco•18m ago•1 comments

Callbacks in C++ using template functors (Rich Hickey, 1996)

https://dl.acm.org/doi/10.5555/260627.260756
1•tosh•18m ago•0 comments

Show HN: Mochi.js: bun-native high-fidelity browser automation library

https://mochijs.com/
1•ccheshirecat•19m ago•0 comments

Frontier Airlines plane hits person on runway during takeoff at Denver airport

https://www.theguardian.com/us-news/2026/may/09/frontier-airlines-plane-hits-pedestrian-denver
1•manarth•20m ago•0 comments

Running Codex Safely at OpenAI

https://openai.com/index/running-codex-safely/
2•Brajeshwar•24m ago•0 comments

Marrying for power: Gendered alliances in mafias

https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0345859
1•defrost•25m ago•0 comments

Meta can read your Instagram DMs starting Friday

https://www.fox32chicago.com/news/meta-can-read-your-instagram-dms-starting-friday-one-step-could...
1•mgh2•25m ago•0 comments

GameStop CEO Trying to Buy eBay Says He Was Banned from eBay

https://www.gamespot.com/articles/gamestop-ceo-selling-gamestop-stuff-on-ebay-to-fund-buyout-of-e...
2•croes•27m ago•0 comments

What the Naysayers of Vibe Coding Are Getting Wrong

https://scrollinondubs.substack.com/p/what-the-naysayers-of-vibe-coding
1•scrollinondubs•28m ago•1 comments

Working with Cowork: Claude Desktop Is Three Apps Pretending to Be One

https://age-of-product.com/claude-desktop/
1•swolpers•28m ago•0 comments

Punic people were genetically diverse with almost no Levantine ancestors

https://www.nature.com/articles/s41586-025-08913-3
2•janandonly•32m ago•0 comments

The Intolerable Hypocrisy of Cyberlibertarianism

https://matduggan.com/the-intolerable-hypocrisy-of-cyberlibertarianism/
3•ColinWright•32m ago•1 comments

New Grok and OpenAI voice models head to head testing

https://techstackups.com/comparisons/grok-tts-vs-openai/
1•sixhobbits•33m ago•0 comments

The things that happen at a lock-picking convention (2013)

https://slate.com/human-interest/2013/03/locksport-the-strange-things-that-happen-at-a-lock-picki...
1•downbad_•34m ago•1 comments

NASA Pushes Next-Gen Mars Helicopter Rotor Blades Past Mach 1

https://www.nasa.gov/solar-system/planets/mars/nasa-pushes-next-gen-mars-helicopter-rotor-blades-...
1•bookofjoe•36m ago•0 comments

Show HN: VBeta – Your personal bouldering coach

https://vbeta-app.github.io/vbeta/index.html
2•celltalk•38m ago•0 comments

Open SRE

https://github.com/Tracer-Cloud/opensre
2•lum1104•40m ago•0 comments

Sea of Nodes

https://github.com/SeaOfNodes
2•tosh•43m ago•0 comments

Richard Dawkins's chatbot isn't conscious: it's just all talk

https://www.thenerve.news/p/opinion-richard-dawkins-claude-chatbot-ai-consciousness-claudia-anil-...
1•andsoitis•44m ago•0 comments

Article: What are LLMs and Generative AI good at

https://jackpritz.com/blog/what-are-llms-and-generative-ai-good-at
2•jack_ftw•45m ago•0 comments

Dispatch: Crime Radar

https://dispatch.churu.org
2•reieicucv•48m ago•2 comments