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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!

Ask HN: How are you using AI?

1•bmaupin•23s ago•0 comments

X to block UK access to accounts linked to terrorist groups in Ofcom agreement

https://www.theguardian.com/technology/2026/may/15/x-ofcom-agreement-block-uk-access-accounts-lin...
1•chrisjj•1m ago•0 comments

Revswap.ai: Trade Dollars with other startups. Book it as revenue

https://www.revswap.ai/#how
1•CGMthrowaway•1m ago•0 comments

Air Power Against Mobile Targets and Missiles

https://secretaryrofdefenserock.substack.com/p/square-peg-in-a-round-hole-airpower
1•mauvehaus•1m ago•0 comments

Show HN: PileaX – AI Chat and note and book Library, all-in-one KnowledgeBase

https://github.com/pileax-ai/pileax
1•pileax•1m ago•0 comments

AI Writing Hits a Ceiling

https://www.axios.com/2026/05/15/human-vs-ai-written-articles
1•Brajeshwar•3m ago•0 comments

#1 on the leading AI memory benchmark using a smaller, cheaper model

https://exabase.io/research/exabase-achieves-state-of-the-art-on-longmemeval-benchmark
1•johnnymakes•5m ago•1 comments

WxRuby3: A cross-platform GUI library for Ruby

https://github.com/mcorino/wxRuby3/
1•thunderbong•9m ago•0 comments

Ask HN: Still No Robots for Chores?

1•julienreszka•10m ago•0 comments

Sam Kieth, Creator of Surreal Comic Book Series the Maxx, Dies at 63

https://www.nytimes.com/2026/03/26/arts/sam-kieth-dead.html
1•franze•10m ago•0 comments

Fungus-powered farming delivers higher yields and better-tasting crops

https://phys.org/news/2026-05-fungus-powered-farming-higher-yields.html
1•thinkcontext•11m ago•0 comments

Dream of the Red Chamber

https://en.wikipedia.org/wiki/Dream_of_the_Red_Chamber
1•doener•12m ago•0 comments

Show HN: Guess the GitHub repo from a code snippet

https://www.codeguesser.xyz
1•grantz_graf•15m ago•0 comments

Update on GitHub Copilot usage-based pricing

https://github.blog/news-insights/company-news/github-copilot-individual-plans-introducing-flex-a...
3•domysee•16m ago•0 comments

The Secret Mission to Fly Taiwan's President to Africa

https://www.nytimes.com/2026/05/14/world/asia/taiwan-eswatini-china-flight.html
1•mooreds•16m ago•0 comments

Show HN: TongueType – Local, privacy-focused Whisper dictation for macOS

https://tonguetype.app/
1•claviska•17m ago•0 comments

Big Tech groups launch global borrowing spree to fund AI expansion

https://www.ft.com/content/d137f1a1-4188-4784-b274-f53082d27aa8
1•1vuio0pswjnm7•18m ago•0 comments

xAI Launched Grok Build

https://abz.global/technology/xai-just-launched-grok-build-ai-coding-agents-are-moving-into-the-t...
1•mariansorca•18m ago•0 comments

MidiVox: Rehearsal Player for Choirs

https://rubjo.github.io/midivox/
1•rubjo•18m ago•1 comments

Open source turns users into builders

https://x.com/i/article/2055201534934446080
1•jbetala7•19m ago•0 comments

Trade Dollars with other startups. Book it as revenue

https://www.revswap.ai/
3•tormeh•19m ago•1 comments

Playboy Interview: Steven Jobs (1985)

https://allaboutstevejobs.com/verbatim/interviews/playboy_1985
1•downbad_•19m ago•0 comments

Most Meaningful Dates on the Web and for an LLM

https://venkatasg.net/blog/dates-2026-05-12.html
1•_venkatasg•20m ago•0 comments

AI Fusion Photography

https://aifusionphotography.com/
1•nikasakana•21m ago•1 comments

Show HN: Endless scrolling IBM Code Page 437 ASCII text

https://crisdosaygo.github.io/random/
2•keepamovin•21m ago•0 comments

Tell HN: Bun Rewrite Thread Disappearance

1•kreco•22m ago•2 comments

Microsoft warns of Exchange zero-day flaw exploited in attacks

https://www.bleepingcomputer.com/news/microsoft/microsoft-warns-of-exchange-zero-day-flaw-exploit...
1•Brajeshwar•22m ago•0 comments

OpenAI reportedly considered legal action over Apple ChatGPT deal

https://firethering.com/openai-apple-chatgpt-iphone/
1•steveharing1•22m ago•0 comments

Simple CPU Design

https://simplecpudesign.com/
1•surprisetalk•24m ago•0 comments

Ratty: A terminal emulator with inline 3D graphics

https://blog.orhun.dev/introducing-ratty/
1•speckx•24m ago•0 comments