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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!

Using LLMs to find Python C-extension bugs

https://lwn.net/Articles/1067234/
1•PaulHoule•2m ago•0 comments

Gunshots fired in standoff at Philippine Senate over ICC suspect

https://www.reuters.com/world/asia-pacific/philippine-senator-says-arrest-is-imminent-urges-publi...
2•JumpCrisscross•2m ago•0 comments

Neanderthals used stone drills to treat cavities 59k years ago, tooth suggests

https://www.theguardian.com/science/2026/may/13/neanderthals-stone-drills-treat-cavities-tooth-si...
1•bookofjoe•3m ago•0 comments

Mandala: A low latency logistics event bridge for Samsara fleets

https://github.com/theoddden/Mandala
1•Facingsouth•3m ago•1 comments

Global Ammonia Infrastructure

https://ammoniaobservatory.com/infrastructure
2•leonidasrup•4m ago•0 comments

Anthropic tests Jupiter-v1-p ahead of its developer conference

https://www.testingcatalog.com/anthropic-tests-jupiter-v1-p-before-potential-launch-on-may-6/
1•gmays•4m ago•0 comments

'Pioneering' message that changed the world

https://www.bbc.co.uk/news/articles/cp84d5pl39zo
1•austinallegro•5m ago•0 comments

Neanderthals Performed Root Canals

https://www.wsj.com/science/archaeology/neanderthals-tooth-root-canal-dentist-study-dfa8a037
1•JumpCrisscross•6m ago•0 comments

CC-Ledger: anatomy of your Claude Code spend

https://ccledger.dev
1•tejpal-diffuse•8m ago•0 comments

How to Build Safe AI (Without Making the AI Safe)

https://whattotelltherobot.com/p/how-to-build-safe-ai-without-making
1•stefie10•8m ago•0 comments

AI as Social Technology

https://knightcolumbia.org/content/ai-as-social-technology
1•beepbooptheory•9m ago•1 comments

System2 – Multi-Agents for Data

https://github.com/diegoscarabelli/system2
2•diegoscara•10m ago•1 comments

Holos runs a complete ActivityPub server directly on your smartphone

https://holos.social/how-it-works
2•ZacnyLos•10m ago•0 comments

State media control influences large language models

https://www.nature.com/articles/s41586-026-10506-7
1•Timofeibu•11m ago•0 comments

China's NEV penetration hits historic 61.4% in April as ICE sales collapse

https://carnewschina.com/2026/05/13/chinas-nev-penetration-hits-historic-61-4-in-april-as-ice-sal...
4•martinpw•11m ago•0 comments

New Claude Code programmatic usage restrictions

https://twitter.com/i/status/2054610152817619388
3•martinald•11m ago•0 comments

Ask HN: Is Anthropic doing too much vibe coding?

1•terabytest•11m ago•0 comments

3D Gaussian Splatting in a Weekend

https://bfeldman.me/3dgs-weekend/
2•b__feldman•11m ago•0 comments

Claude Code weekly limits increasing 50% till July 13

https://twitter.com/ClaudeDevs/status/2054639777685934564
2•mesmertech•12m ago•2 comments

Points are an inconsistent unit of measurement

https://buttondown.com/hillelwayne/archive/points-are-a-weird-and-inconsistent-unit-of/
1•MillironX•12m ago•0 comments

Show HN: Brutal Audit, brutally honest AI site audit

https://brutalaudit.com
1•smakosh•13m ago•0 comments

Googlebook

https://en.wikipedia.org/wiki/Googlebook
1•wsgeorge•13m ago•0 comments

Why Some People Are Allergic to 'Peanut Butter Raises'

https://www.nytimes.com/2026/05/10/business/peanut-butter-raises.html
1•paulpauper•13m ago•0 comments

Data Centers and Local Economies in the Age of AI: A Shift–Share Approach

https://www.nber.org/papers/w35194
1•paulpauper•14m ago•0 comments

New way to use CLIs from your phone

https://apps.apple.com/us/app/mobilecli/id6757689455
1•AlexanderKnigge•15m ago•1 comments

Some non-obvious why AI will create transitional problems in employment

https://marginalrevolution.com/marginalrevolution/2026/05/some-non-obvious-reasons-why-ai-will-cr...
1•paulpauper•15m ago•0 comments

Overworked AI Agents Turn Marxist, Researchers Find

https://www.wired.com/story/overworked-ai-agents-turn-marxist-study/
1•littlexsparkee•18m ago•1 comments

CVE-2026-42945 – Critical heap buffer overflow in Nginx ngx_HTTP_rewrite_module

https://github.com/DepthFirstDisclosures/Nginx-Rift
1•882542F3884314B•21m ago•0 comments

OpenAI Flips the Script

https://every.to/context-window/openai-flips-the-script
1•gmays•22m ago•0 comments

Extract iOS backups using only stock macOS command line tools

https://github.com/paralevel/extract-ios-backups-from-terminal
1•trapf•23m ago•0 comments