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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•11mo 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!

AMD Posts HDMI 2.1 FRL Patches for Their Amdgpu Linux Driver

https://www.phoronix.com/news/AMDGPU-HDMI-2.1-FRL-Patches
1•type0•1m ago•0 comments

Andrej Karpathy: From Vibe Coding to Agentic Engineering

https://www.youtube.com/watch?v=96jN2OCOfLs
1•swolpers•4m ago•0 comments

Study: AI models that consider user's feeling are more likely to make errors

https://arstechnica.com/ai/2026/05/study-ai-models-that-consider-users-feeling-are-more-likely-to...
1•rbanffy•10m ago•0 comments

Show HN: I built Male Hormone Lab Interpreter that does what LLMs can't

https://www.longevity-tools.com/male-hormones-interpreter
2•zsolt224•11m ago•0 comments

Spirit Airlines Is Winding Down All Operations

https://spiritrestructuring.com/
1•KoftaBob•12m ago•0 comments

Show HN: Shutt – Turn Strava activities into shareable photo/video posts

https://shutt.run
1•zzarcon•13m ago•0 comments

Who's the First Person in History Whose Name We Know? (2015)

https://www.nationalgeographic.com/science/article/whos-the-first-person-in-history-whose-name-we...
1•downbad_•13m ago•1 comments

Show HN: Browser-based light pollution simulator using real photometric data

https://iesna.eu/?wasm=skyglow_demo
4•holg•15m ago•0 comments

Show HN: PythonStarter – now with Bitcoin Lightning payments

https://pythonstarter.co/
1•dan_easterman•18m ago•0 comments

Intel Inside the Micro Revolution: 8008 Origins

https://thechipletter.substack.com/p/intel-inside-the-micro-revolution
1•klelatti•19m ago•0 comments

Show HN: Filling PDF forms with AI using client-side tool calling

https://copilot.simplepdf.com/?share=a7d00ad073c75a75d493228e6ff7b11eb3f2d945b6175913e87898ec96ca...
2•nip•29m ago•1 comments

Brace for the patch tsunami: AI is unearthing decades of buried code debt

https://www.theregister.com/2026/05/02/ncsc_brace_for_patch_tsunami/
3•zeristor•29m ago•0 comments

Show HN: From Beats to Notes and Beyond

https://bookerapp.replit.app/book/fom/from-temporal-structure
1•ersinesen•33m ago•0 comments

Ask HN: Is it possible to upgrade the RAM of a MacBook Air M2?

1•julienreszka•33m ago•0 comments

CPanel CVE-2026-41940 Exploitation from a Honeypot Perspective

https://defusedcyber.com/cve-2026-41940-cpanel-exploitation-honeypot-perspective
1•waihtis•37m ago•0 comments

Ask HN: Is the AI running out of capacity?

1•roschdal•39m ago•0 comments

Show HN: Large Scale Article Extract of Newspapers 1730s-1960s

https://snewpapers.com/
2•brettnbutter•41m ago•1 comments

ScopeGuard 0.0.7: Your Go-to linter for scope and shadow issues, now with MCP

https://old.reddit.com/r/golang/comments/1t0nw27/scopeguard_007_your_goto_linter_for_scope_and/
2•eik•42m ago•0 comments

AI coding tools are silently disagreeing with each other

https://github.com/sampleXbro/agentsmesh
2•samplexBro•42m ago•0 comments

Dabbling in Erlang, part 2: A minimal introduction (2013)

https://agis.io/post/dabbling-in-erlang-a-minimal-introduction/
1•pasxizeis•46m ago•0 comments

Claude Code: Creating Kubernetes Debugging AI Agent for VictoriaMetrics

https://rtfm.co.ua/en/claude-code-creating-kubernetes-debugging-ai-agent-for-victoriametrics/
1•valyala•48m ago•0 comments

The Three Durable Function Forms

https://jack-vanlightly.com/blog/2025/12/10/the-three-durable-function-forms
1•birdculture•55m ago•0 comments

Why are there both TMP and TEMP environment variables, and which one is right?

https://devblogs.microsoft.com/oldnewthing/20150417-00/?p=44213
1•ankitg12•1h ago•0 comments

Shadcn/UI: A set of beautifully designed components that you can customize

https://github.com/shadcn-ui/ui
3•doener•1h ago•0 comments

Hanami, Dry and ROM are joining as Hanakai

https://hanakai.org/blog/2026/05/01/welcome-to-hanakai
1•makenosound•1h ago•0 comments

Lucide: Open-source icon library with 1600 vector (SVG) files for icons

https://github.com/lucide-icons/lucide
2•doener•1h ago•0 comments

A collection of Tailwind CSS v4.0 utilities for creating beautiful animations

https://github.com/Wombosvideo/tw-animate-css
2•doener•1h ago•0 comments

There is no Shopify for service businesses. Prove me wrong

https://www.indiehackers.com/post/there-is-no-shopify-for-service-businesses-i-keep-waiting-for-s...
1•stangineer•1h ago•0 comments

SKILL.make: Makefile Styled Skill File

https://github.com/Teaonly/SKILL.make
6•teaonly•1h ago•1 comments

Ask HN: What book have you given as a gift?

3•chistev•1h ago•8 comments