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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!

Tab Scope – See which Chrome tabs are eating your RAM, suspend in one click

https://chromewebstore.google.com/detail/tabscope/gngklpbmahigplgneolllpedkeeonjcp
1•Austino254•47s ago•0 comments

Zed is 1.0

https://zed.dev/blog/zed-1-0
1•salkahfi•1m ago•0 comments

The Apocalypse Goes Mainstream

https://www.nytimes.com/2026/04/26/briefing/apocalypse.html
1•iancmceachern•1m ago•0 comments

Building a (mostly) reliable research assistant

https://blog.dark.ca/posts/building-a-mostly-reliable-ai-research-assistant/
1•mooreds•1m ago•0 comments

Show HN: GitChop – Git rebase -I without the TODO file

https://bendansby.com/apps/gitchop.html
1•webwielder2•2m ago•0 comments

The Open Social Web Needs Section 230 to Survive

https://www.eff.org/deeplinks/2026/04/open-social-web-needs-section-230-survive
1•Brajeshwar•2m ago•0 comments

Latest release, curl/libcurl 8.20.0 Fixes Security Vulnerabilities

https://tux.re/forum/viewtopic.php?t=186
1•Neteam•2m ago•0 comments

AAuth

https://www.aauth.dev/
1•mooreds•2m ago•0 comments

Jack Dorsey-backed Vine reboot Divine launches to the public

https://techcrunch.com/2026/04/29/jack-dorsey-backed-vine-reboot-divine-launches-to-public/
1•mkfain•2m ago•0 comments

Issue #001 · Claude 4, Gemini Ultra 2, and GPT-5 Enterprise

https://www.theautonomous.net/issue/001-april-29-2026
1•kortixosai•2m ago•0 comments

This 'miracle tree' can filter more than 98% of microplastics from tap water

https://www.cnn.com/2026/04/29/climate/moringa-miracle-tree-microplastics-filter-tap-water
1•mooreds•2m ago•0 comments

Free network engineering toolkit – subnet calc, BGP lookups, cloud status, RF/Vo

https://www.interconnectedsystems.net/#tools
1•isiinc•3m ago•0 comments

The lost boys, thrown out of US sect so older men can marry more wives (2005)

https://www.theguardian.com/world/2005/jun/14/usa.julianborger
1•Michelangelo11•3m ago•0 comments

Show HN: I made a Tamagotchi app that lets you add your IRL pet

https://apps.apple.com/bg/app/boko-tamagotchi-virtual-pet/id6759446145
1•Iskrata•3m ago•0 comments

Presswork 9: Making a Sigil

https://pandemonium.press/episode-9-making-a-sigil/
1•dsr_•5m ago•0 comments

Bypassing DPI with eBPF

https://bora.sh/bypassing-dpi-with-ebpf/
1•jiveturkey•5m ago•0 comments

Beam Is a Suspiciously Good Fit for Agents

https://playground.tetraresearch.io/p/beam-is-a-suspiciously-good-fit-for
1•tawb•5m ago•0 comments

Show HN: EasyWheels – Pre-built CUDA wheels, never compile flash-attn again

https://easywheels.io
1•davidkny22•8m ago•1 comments

SketchVLM: Letting VLMs draw on images while explaining their reasoning

https://github.com/Brandon-Collins7/sketchvlm
2•taesiri•8m ago•0 comments

The 3072-Dimension Problem

https://mixpeek.com/blog/the-3072-dimension-problem/
1•Beefin•11m ago•0 comments

Loans Are Bets on Doom

https://iter.ca/post/doom-loans/
1•speckx•13m ago•0 comments

Chinese GPU maker Lisuan Tech becomes only the fourth to earn Microsoft WHQL

https://www.tomshardware.com/pc-components/gpus/in-historic-first-chinese-gpu-maker-lisuan-tech-b...
1•arprocter•13m ago•0 comments

Mobilewright – Playwright for iOS and Android

https://github.com/mobile-next/mobilewright
2•leorstern•15m ago•1 comments

Show HN: Open Vibe – free, open-source agent-led web dev course

https://openvibe.sh/
1•hot_town•15m ago•0 comments

Two Jewish men stabbed in north London

https://www.bbc.com/news/live/c3ve2nr60xzt
4•Tomte•17m ago•0 comments

Sam Altman and his former hero Elon Musk are taking their toxic feud to court

https://www.bbc.com/news/articles/cn8dedv8w8xo
3•chistev•17m ago•0 comments

Git Commands for Project Management over Email

https://git-scm.com/book/en/v2/Distributed-Git-Contributing-to-a-Project#_project_over_email
1•rickcarlino•18m ago•0 comments

FOSDEM 2026 – All FOSDEM 2026 videos are online

https://fosdem.org/2026/news/2026-04-26-all-videos-published/
2•birdculture•18m ago•0 comments

AI wants to nuke your database. Guardrails fix that

https://blog.railway.com/p/your-ai-wants-to-nuke-your-database
1•thisismahmoud_•18m ago•3 comments

GitHub Is Sinking

https://dbushell.com/2026/04/29/github-is-sinking/
1•speckx•19m ago•0 comments