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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!

Chinese spies used lies, love and betrayal to target the Federal Reserve

https://www.cnbc.com/2026/09/30/john-rogers-fed-china-espionage-case.html
1•cramer4next•2m ago•0 comments

"Apple engineer" builds GitHub AI torture chamber to inflict "pain" on models

https://www.machine.news/apple-engineer-builds-github-ai-torture-chamber-to-inflict-digital-pain-...
1•LargeLingoMod•2m ago•0 comments

Israel-bound flight diverted to Saudi Arabia after brawl between pilots

https://www.reuters.com/world/middle-east/diverted-flydubai-flight-israel-was-not-hijacking-incid...
1•skibz•3m ago•0 comments

Notes on Working with Coding Agents

https://adri0.com/blog/notes-on-working-with-coding-agents
1•quite-sfwd•5m ago•1 comments

Getting Banned by ChatGPT, Thrice

2•nirav_rohra•6m ago•0 comments

Religious Scholars Met with Anthropic. What They Heard Stunned Them

https://www.nytimes.com/2026/09/29/us/anthropic-claude-morals-ai.html
1•pseudolus•6m ago•1 comments

Superalignment (Situational Awareness)

https://situational-awareness.ai/superalignment/
1•ronfriedhaber•6m ago•0 comments

OpenSSL High DTLS flaw can leak heap memory (CVE-2026-84782)

https://openssl-library.org/news/secadv/20260929.txt
1•joshcsimmons•7m ago•0 comments

Vanguard warns France is 'degrading credit' as borrowing costs surge

https://www.ft.com/content/7820a84f-338e-4b91-a9b6-241a9bf81539
1•rzk•8m ago•0 comments

Show HN: Scrieb – Offline meeting transcription, diarization and summaries

https://scrieb.com/
1•alxkzh•13m ago•0 comments

What's the Future for Pure Math Research in the Age of AI?

https://writings.stephenwolfram.com/2026/09/whats-the-future-for-pure-math-research-in-the-age-of...
1•demivoleegaston•13m ago•0 comments

Twin

https://twin.siddharththakkar.xyz/
1•woustachemax•15m ago•0 comments

OpenAI Dev Day, Dot and OpenAI's Product Transition, Sign in with ChatGPT

https://stratechery.com/2026/openai-dev-day-dot-and-openais-product-transition-sign-in-with-chatgpt/
1•swolpers•19m ago•0 comments

Who's Responsible for Irresponsible AI?

https://www.deeplearning.ai/the-batch/whos-responsible-for-irresponsible-ai
1•svg7•20m ago•0 comments

Declaration of the Rights of Man and of the Citizen

https://en.wikipedia.org/wiki/Declaration_of_the_Rights_of_Man_and_of_the_Citizen
1•peter_d_sherman•20m ago•0 comments

Brief exposure to hopeful YouTube videos reduces depressive symptoms

https://psycnet.apa.org/doiLanding?doi=10.1037%2Fppm0000676
1•geox•23m ago•0 comments

Gold Kubb Fanless MiniPC, with 13kg of gold (worth $1.7M)

https://www.fanlesstech.com/2026/09/gold-kubb-fanless.html
1•giuliomagnifico•25m ago•0 comments

Programmatic Tool Calling

https://developers.openai.com/api/docs/guides/tools-programmatic-tool-calling
1•tosh•25m ago•0 comments

Experimental Distinguishability of Computed and Fundamental Physical Dynamics

https://omarali.me/papers/computed-vs-fundamental-physical-dynamics
1•omarali-me•27m ago•0 comments

Show HN: VoxScribe – local, offline voice dictation for Windows (open source)

https://github.com/ahmedhmam1994/voxscribe-ai-voice-dictation
1•ahmedibrahim199•27m ago•0 comments

Useful JavaScript Features Added in ECMAScript 2026

https://jsdev.space/ecmascript-2026-features/
1•javatuts•27m ago•0 comments

How to Sync a Design System with Claude Design

https://nitayneeman.com/blog/how-to-sync-a-design-system-with-claude-design/
1•nitayneeman•27m ago•0 comments

AeroJAX

https://github.com/arriemeijer-creator/AeroJAX
1•marklit•28m ago•0 comments

Show HN: A crypto trading demo using WebGPU and QuestDB

https://www.scitrader.io/
2•abtgraphics•30m ago•0 comments

GPT-6.1 Sol replaces GPT-6 Sol after just 7 days, with near-Astra intelligence

https://artificialanalysis.ai/articles/gpt-6-1-sol-replaces-gpt-6-sol-after-just-7-days-with-near...
2•theanonymousone•32m ago•1 comments

Ken Griffin Donates $500M to Carnegie Mellon School of Computer Science

https://www.cmu.edu/news/stories/archives/2026/september/500m-gift-will-fuel-next-era-of-computer...
1•jtbetz22•33m ago•1 comments

AA-AgentPerf-Local: Benchmarking local AI agents on laptops and workstations

https://artificialanalysis.ai/articles/aa-agentperf-local
1•theanonymousone•33m ago•0 comments

Pi.dev: You Said No MCP

https://earendil.com/posts/you-said-no-mcp/
35•yarapavan•35m ago•9 comments

Socialist in Seattle

https://prospect.org/2026/09/28/oct-2026-socialist-in-seattle-katie-wilson/
2•robtherobber•36m ago•0 comments

Israel-bound flight lands in Saudi Arabia after violent incident between pilots

https://www.cnn.com/2026/09/30/world/live-news/dubai-israel-plane-flydubai-intl
9•jeffwass•37m ago•1 comments