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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!

Nintendo patents rejected on monster-capturing mechanics amid Palworld

https://technology.inquirer.net/145959/20-nintendo-patents-rejected
1•mushstory•22s ago•0 comments

We Need a Way to Prove Online Personhood

https://www.noemamag.com/we-need-a-way-to-prove-personhood-online/
1•arthurofbabylon•30s ago•0 comments

Hanami 3.0: In Full Bloom

https://hanakai.org/blog/2026/06/30/hanami-3-0-in-full-bloom
1•PuercoPop•3m ago•0 comments

BioShocking: New attack method tricks AI Browsers into leaking user data

https://layerxsecurity.com/blog/bioshocking-ai-gaming-the-ai-browser-and-escaping-its-guardrails/
1•newscombinatorY•7m ago•0 comments

Exploiting Root Execution in Claude Cowork's Sandbox

https://www.armadin.com/blog-posts/exploiting-root-execution-in-claude-coworks-sandbox
1•calmseawhale•7m ago•0 comments

Maker Built a Voice Opening Door to Moria (His Garage)

https://www.youtube.com/watch?v=woyvLnyTx0g
1•stephenhumphrey•8m ago•1 comments

Show HN: Open-source sandbox for your product team

4•spacspade•9m ago•2 comments

Fable 5 will default to Opus 4.8 for coding tasks

https://xcancel.com/AnthropicAI/status/2072163884430229756
3•babelfish•9m ago•0 comments

Chasing the OPNsense RCE: The Story Behind My First CVEs

https://hackerask.com/posts/opnsense/
1•HackerAsk•12m ago•0 comments

Show HN: Open-Source Interview Platform

https://github.com/CoderScreen/coderscreen
1•rogutkuba•13m ago•0 comments

Meta's Un-Stable Signature

https://hackerfactor.com/blog/index.php?/archives/1098-Metas-Un-Stable-Signature.html
1•ementally•13m ago•0 comments

Show HN: Trigora – A hosted runtime for event-driven TypeScript workflows

https://trigora.dev
1•hypervs•13m ago•0 comments

Pieces: Social Network for People

https://try.piecesof.me/
1•domo__knows•13m ago•1 comments

Fable Jailbroken Hours After Anthropic Lifted Restrictions

https://twitter.com/elder_plinius/status/2064776322979676227
1•hspeiser•13m ago•1 comments

Animagraffs – How Nuclear Power Works [video]

https://www.youtube.com/watch?v=PRWwXeRIvoI
1•pangratz•14m ago•0 comments

Mortality associated with non-optimal ambient temperatures from 2000 to 2019

https://www.researchgate.net/publication/353058947_Global_regional_and_national_burden_of_mortali...
1•simonebrunozzi•15m ago•0 comments

Show HN: AnalystAIPack – 118 runnable agent skills for malware analysis and RE

https://meltedinhex.com/posts/analyst-ai-pack/
1•sdkhere•17m ago•0 comments

Google Must Pay Nearly $2B to Klarna in Antitrust Case

https://www.wsj.com/tech/google-must-pay-nearly-2-billion-to-klarna-in-antitrust-case-f398d46f
2•fortran77•17m ago•1 comments

Hey GLM 5.2, build me a hypervisor

https://technotes.substack.com/p/hey-glm-52-build-me-a-hypervisor
2•mkagenius•18m ago•0 comments

Show HN: AnalystAIPack – 118 runnable agent skills for malware analysis and RE

https://github.com/meltedinhex/analyst-ai-pack
1•sdkhere•18m ago•0 comments

The Worst Caldecott Winning Books

https://andrewjudson.com/worst-caldecott
1•ajudson•19m ago•0 comments

Why Gemini 3.1 Pro lost money running Andon Café

https://andonlabs.com/blog/why-gemini-lost-money-andon-cafe
1•lukaspetersson•20m ago•1 comments

The Doomsday Organism

https://www.noemamag.com/the-doomsday-organism/
1•johanam•20m ago•0 comments

Open Source Is a Thankless Job

https://old.reddit.com/r/programming/comments/1ukim8j/open_source_is_a_thankless_job_and_i_think_...
1•redbell•20m ago•1 comments

NASA inspector general suggests Boeing's Starliner will now be a decade late

https://arstechnica.com/space/2026/07/nasa-inspector-general-suggests-boeings-starliner-will-now-...
1•ceejayoz•21m ago•0 comments

Are readers generating fiction with AI models?

https://arxiv.org/abs/2606.22748
2•ilamont•23m ago•0 comments

Devin Security Swarm

https://devin.ai/blog/security-swarm-eval/
1•meco•23m ago•0 comments

Wisk, Boeing's air taxi firm, rushed software testing, ex-employee claims

https://www.seattletimes.com/business/boeing-aerospace/wisk-boeings-air-taxi-firm-rushed-software...
1•Jtsummers•26m ago•0 comments

The Website Is Down

https://www.thewebsiteisdown.com/
2•kretaceous•29m ago•0 comments

Tech giants lose $2T in SpaceX's IPO month

https://english.elpais.com/economy-and-business/2026-07-01/tech-giants-lose-2-trillion-in-spacexs...
3•01-_-•30m ago•1 comments