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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!

'modern-day slavery' in the Congo powers the rechargeable battery economy

https://www.npr.org/sections/goatsandsoda/2023/02/01/1152893248/red-cobalt-congo-drc-mining-siddh...
1•Tellusion•1m ago•0 comments

Retrieval's bottleneck is moving from finding to selecting

https://www.kapa.ai/blog/retrieval-bottleneck
8•emil_sorensen•2m ago•0 comments

Programming Is Not a Skill

https://ethang.dev/blog/programming-is-not-a-skill/
1•eglove•4m ago•0 comments

The Download: everyday AI harms and the race to nuclear spaceflight

https://www.technologyreview.com/2026/10/26/1147650/the-download-everyday-ai-harms-nuclear-spacef...
1•joozio•5m ago•0 comments

Microsoft Announces Type Server Protocol, Extension of Language Server Protocol

https://github.com/microsoft/pylance-release/blob/main/docs/tsp/type-server-protocol.md
1•adamnemecek•6m ago•0 comments

Battle Drones

https://simonwillison.net/2026/Oct/20/battledrones/
1•colinprince•6m ago•0 comments

The Safe Internet Is Shrinking

https://www.theatlantic.com/technology/2026/10/the-safe-internet-is-shrinking/689130/
2•FinnLobsien•6m ago•0 comments

Show HN: Ploom, find thread bugs in Python by trying every interleaving

https://github.com/AdilZouitine/ploom
1•AdilZtn•8m ago•0 comments

Pair – code walk-through like a human would

https://github.com/pirate-baby/pair
2•norton120•9m ago•1 comments

Expanding Claude for Nonprofits

https://claude.com/resources/articles/expanding-claude-for-nonprofits
2•pretext•11m ago•0 comments

Swedish government blocks ChatGPT and Claude. Here's why

https://www.euronews.com/2026/10/26/swedish-government-blocks-chatgpt-and-claude-heres-why
3•devonnull•12m ago•1 comments

Show HN: TripBalls Gigs – Your artists' tours on a map, priced as trips

https://gigs.tripballs.now/
1•sanjosanjo•13m ago•0 comments

After LiteLLM's backdoor, we open-sourced an OS-level package firewall

https://github.com/usestrix/firewall
22•iacgm•15m ago•1 comments

Microsoft is offering buyouts to 60k workers

https://twitter.com/kobeissiletter/status/2114745896315359305
3•taubek•15m ago•1 comments

Show HN: Tabcove – automatic, local-only tab backups for Chrome and Edge

https://chromewebstore.google.com/detail/tabcove-save-restore-back/ccmjgbajjpimmhdnacanbbhmfjecjnlp
1•umairtahir•16m ago•0 comments

Ask HN: Do you still read clean code and software architecture books?

2•pelcg•17m ago•0 comments

Halide for Duo: Electric Boogaluo

https://www.lux.camera/halide-for-duo/
1•johnbehnke•17m ago•0 comments

Essential Tools for Live Video Stream Monitoring

https://www.red5.net/blog/3-essential-tools-for-live-video-stream-monitoring/
1•mondainx•19m ago•0 comments

GPT-6.1 Terra

https://openai.com/index/introducing-gpt-6-1-terra/
37•meetpateltech•19m ago•8 comments

SpaceX closes $40B debt deal for AI chips

https://www.cnbc.com/2026/10/26/spacex-closes-40-billion-debt-deal-for-ai-chips-elon-musk-.html
3•Betelbuddy•21m ago•0 comments

Walter Koenig, the Russian Crewman Chekov on 'Star Trek,' Dies at 90

https://www.hollywoodreporter.com/tv/tv-news/walter-koenig-dead-chekov-star-trek-russian-1236740088/
8•gumby•21m ago•2 comments

Anthropic Reveals It Will Pay SpaceX Up to $120.5B for AI Compute

https://teslanorth.com/2026/10/26/anthropic-s1-spacex-120b-compute/
2•entryleveljobsc•21m ago•1 comments

Is technology bossing us around too much?

https://www.rnz.co.nz/life/lifestyle/is-technology-bossing-us-around-too-much
4•billybuckwheat•21m ago•0 comments

Defense of Japan 2026 Annual White Paper Digest [pdf]

https://www.mod.go.jp/j/press/wp/wp2026/pdf/DOJ2026_Digest_EN.pdf
1•sb057•21m ago•0 comments

GPT 6.1 Terra

https://developers.openai.com/api/docs/models/gpt-6.1-terra
4•pcwelder•22m ago•0 comments

Meta Employees Denounce Interference in Brazilian Elections

https://www.panamericandispatch.org/p/meta-employees-denounce-interference
58•guitcastro•23m ago•7 comments

Oldest GUI application that still runs on Windows 11

https://blog.enlyth.com/posts/oldest-windows-gui-app-win-11/
3•enlyth•24m ago•0 comments

Consumer credit costs in Poland are rising despite falling rates

https://download.ssrn.com/2026/9/25/7525781.pdf?response-content-disposition=inline&X-Amz-Securit...
1•tszymaniak•25m ago•0 comments

So you say you hate 'surveillance pricing'

https://www.cnn.com/2026/10/19/business/surveillance-prices-government-bans
21•mooreds•26m ago•0 comments

In Leaked Audio, Flock CEO Tells Cops Backlash to the Company Isn't Real

https://www.404media.co/in-leaked-audio-flock-ceo-tells-cops-backlash-to-the-company-isnt-real/
3•Frieren•27m ago•1 comments