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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!

CSB Releases Bio-Lab Conyers Final Investigation Report

https://www.csb.gov/csb-releases-bio-lab-conyers-final-investigation-report/
1•Jimmc414•1m ago•0 comments

RFC 9987: Secure Shell (SSH) Agent Protocol

https://www.rfc-editor.org/rfc/rfc9987.html
1•Jimmc414•1m ago•0 comments

Stateless MCP has recaptured my interest

https://simonwillison.net/2026/Jul/31/stateless-mcp/
1•swyx•1m ago•0 comments

Show HN: Pronto – real‑time wire for AI agents (70k+ feeds connected)

https://pronto.stream/
1•MomohNobert•2m ago•0 comments

Drug reverses autism-like brain changes in adult mice within hours

https://www.uclahealth.org/news/release/drug-reverses-autism-like-brain-changes-adult-mice-within
1•gmays•3m ago•0 comments

Oil Droplets Remodel Themselves, Swallow Their Surroundings Like Living Cells

https://www.nyu.edu/about/news-publications/news/2026/july/oil-droplets-remodel-themselves.html?c...
2•geox•6m ago•0 comments

Was AI Responsible for Finding the Coldcard Security Flaw?

https://cryptonews.net/news/security/33234551/
1•paulpauper•6m ago•0 comments

A discarded SpaceX rocket is on a high-speed collision course with the moon

https://phys.org/news/2026-07-discarded-spacex-rocket-high-collision.html
1•bookmtn•12m ago•0 comments

AT&T CEO Says He Can't Deploy Robocall Blockers Without FCC Approval. He's Wrong (2016)

https://web.archive.org/web/20160602030339/http://consumerist.com/2016/06/01/att-ceo-says-he-cant...
2•dredmorbius•14m ago•0 comments

Show HN: Created a Drink Journal App, Drinqly

https://drinqly.io/welcome
1•haileivera•14m ago•0 comments

Docs in 2026: Feed the machine, then guide the humans

https://passo.uno/tech-writing-role-split/
1•theletterf•19m ago•0 comments

Karakeep Release 0.33.1

https://github.com/karakeep-app/karakeep/releases/tag/v0.33.1
1•toomuchtodo•20m ago•1 comments

Rcarmo/umcp: A micro MCP core (asyncio and synchronous)

https://github.com/rcarmo/umcp
1•rcarmo•20m ago•0 comments

Laravel LSP, Pest 5, Laracon US 2026 – A Day with Laravel #062

https://a-day-with-laravel.happyto.dev/p/laravel-lsp-pest-5-laracon-us-2026-a-day-with-laravel-062
1•happytodev•21m ago•0 comments

I am building a cool OS like simulator based on Corgis

https://github.com/ILikeLinux123/Corgi-OS
2•Linuxisgood•22m ago•0 comments

Atom is better than RSS, in ways that matter

https://chrismorgan.info/atom%3Erss
4•frizlab•23m ago•0 comments

2025 Review of Notorious Markets for Counterfeiting and Piracy [pdf]

https://ustr.gov/sites/default/files/files/Press/Releases/2026/2025%20Notorious%20Markets%20List%...
1•zebreus•26m ago•0 comments

ModelExpress: Distributing Model Artifacts at the Speed of Light

https://developer.nvidia.com/blog/modelexpress-distributing-model-artifacts-at-the-speed-of-light/
1•gmays•30m ago•0 comments

Conor Oberst Survived Teenage Rock Stardom

https://www.nytimes.com/2026/07/24/arts/music/conor-oberst-bright-eyes-interview-popcast.html
1•bookofjoe•30m ago•1 comments

Show HN: Evidence-to-Skill – a gate between untrusted sources and agent skills

https://github.com/Sanexxxx777/evidence-to-skill
1•Aleksandr_NFA•35m ago•0 comments

The Beelink Mate Pro

https://taoofmac.com/space/reviews/2026/08/01/2130
1•rcarmo•37m ago•0 comments

Presigned URLs are technically a security vuln

https://www.tigrisdata.com/blog/presigned-urls-security-vuln/
1•ErenayDev•39m ago•0 comments

Grace

https://rodrigoalvesvieira.com/2026/08/01/grace
1•ravieira•40m ago•0 comments

Busy Beaver Holdouts Lists

https://wiki.bbchallenge.org/wiki/Holdouts_lists
2•frozenseven•40m ago•0 comments

Harry Potter and the Chamber of Secrets

https://en.wikipedia.org/wiki/Harry_Potter_and_the_Chamber_of_Secrets
1•chistev•40m ago•0 comments

The 14 Steps it takes to open my office door with a new phone

https://shub.club/writings/2026/august/14-steps-to-open-a-door/
12•forthwall•46m ago•9 comments

The Wheels We Keep Reinventing

https://blainsmith.com/articles/reinventing-the-wheel/
1•birdculture•49m ago•0 comments

Show HN: Copy any website pixel perfect

https://github.com/HarKro753/claude-copy
2•Harro123•52m ago•0 comments

How the Heck Does JPEG Work?

https://perthirtysix.com/how-the-heck-does-jpeg-work
2•safehuss•1h ago•0 comments

Show HN: Check technical fit for B2B prospects without questionnaires

https://tryscoped.com/demo
1•ininew•1h ago•1 comments