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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•8mo 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!

Just updated CommitGuard's landing page, does it explain the product?

https://commitguard.ai
1•moshetanzer•3m ago•1 comments

US used powerful mystery weapon that brought Venezuelan soldiers to their knees

https://nypost.com/2026/01/10/world-news/us-used-powerful-sonic-weapon-in-venezuela-during-raid-t...
2•petermcneeley•6m ago•0 comments

Tux Paint

https://tuxpaint.org/
2•1317•6m ago•0 comments

Show HN: Human or AI-made song detector and 100% Private Audio Mastering

https://kliga.com
1•aswinsilvadasan•9m ago•0 comments

Show HN: EB3F A framework to turn LLM audits into a legal-grade

1•seesea•10m ago•0 comments

Big Tech spared strict rules in EU digital regulations overhaul, sources say

https://www.reuters.com/business/media-telecom/big-tech-spared-strict-rules-eu-digital-rule-overh...
2•TechTechTech•16m ago•0 comments

The Nature of Security Failure

1•__spirit__•18m ago•0 comments

I Cannot SSH into My Server Anymore (and That's Fine)

https://soap.coffee/~lthms/posts/i-cannot-ssh-into-my-server-anymore.html
1•birdculture•20m ago•0 comments

Humanity Wins

https://www.lesswrong.com/posts/dw3NZot9kKcY5dacL/how-humanity-wins
2•PhilosophyForAI•22m ago•0 comments

Unstructured Document Ingestion Pipeline

1•moaffaneh•25m ago•0 comments

Show HN: Sebastos: a sync client for Standard Ebooks

https://github.com/grahame/sebastos
2•grahameb•26m ago•0 comments

Show HN: buse – automate your browser from the terminal

https://github.com/rinvii/buse
1•rinvi•26m ago•0 comments

Tests for Autism? Companies Are Selling Them, but Research Is Still Scant

https://www.nytimes.com/2026/01/07/health/autism-tests-skin-hair-antibodies.html
1•bookofjoe•31m ago•1 comments

People Not People

https://robinrendle.com/notes/people-not-people/
1•treadump•35m ago•0 comments

100% free rest API tools

https://restapitools.com/
1•daRepo90•36m ago•0 comments

Zap the sidebar and focus: Positron peeling away from VS Code

https://bsky.app/profile/libbyheeren.bsky.social/post/3mc2dw4ntek2e
1•ionychal•36m ago•0 comments

Bellingcat: Positioning of the Agent's Gun at the Shooting in Minneapolis [video]

https://www.youtube.com/watch?v=N9C-ubG6wrQ
6•praptak•37m ago•0 comments

New Zealand geodetic datum deformation model

https://www.linz.govt.nz/guidance/geodetic-system/coordinate-systems-used-new-zealand/geodetic-da...
1•fanf2•37m ago•0 comments

Show HN: Arbitration, a way to experience live sports through both fanbases

https://www.app.arbi.gg/
1•ra0x3•38m ago•0 comments

Ajax.aspnetcdn.com Expired TLS Cert

1•jvilalta•40m ago•0 comments

UK Orders Ofcom to Explore Encryption Backdoors

https://reclaimthenet.org/uk-orders-ofcom-to-explore-encryption-backdoors
14•worldofmatthew•43m ago•1 comments

Tesla's Germany Sales Down 72% from Their Peak

https://cleantechnica.com/2026/01/08/teslas-germany-sales-down-72-from-their-peak/
15•01-_-•45m ago•0 comments

Giant Anaconda the discovery that is rewriting what we know about the Amazon

https://comuniq.xyz/post?t=693
2•01-_-•48m ago•0 comments

Show HN: Show HN: Ted Mosby – open-source Claude agent for architectural wikis

https://www.npmjs.com/package/ted-mosby
1•jackomelon•49m ago•1 comments

LLM coding workflow going into 2026

https://medium.com/@addyosmani/my-llm-coding-workflow-going-into-2026-52fe1681325e
2•lobo_tuerto•49m ago•1 comments

Writing Evals for AI agents

https://www.anthropic.com/engineering/demystifying-evals-for-ai-agents
1•seshagiric•50m ago•0 comments

Russia damages its only launch pad for astronauts to lift off to ISS (2025)

https://www.livescience.com/space/space-exploration/russia-accidentally-destroys-its-only-working...
4•mkl•51m ago•0 comments

Finding OnlyFans creators by face: search similar people from an image

https://onlyfanssearch.vip
2•mysaasidea•52m ago•1 comments

Intelligence Platform for the Modern Hunter

1•Wysspr•55m ago•2 comments

Build a Perceptron from Scratch [Rust]

https://knowledge.dev/courses/perceptron-rust
1•deniskolodin•55m ago•1 comments