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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!

The Community Aspect of Decompilation Has Been Broken

https://www.timeextension.com/news/2026/10/the-community-aspect-of-decompilation-has-been-broken-...
1•suprjami•4m ago•0 comments

The Country Cramming for the AI Revolution

https://nymag.com/intelligencer/article/china-ai-learning-craze.html
1•Michelangelo11•4m ago•0 comments

Show HN: Chartist v2 – tiny SVG charts, now with SSR and terminal output

https://chartist.dev/
1•gionkunz•11m ago•0 comments

In 1960, scientists predicted the world would end on November 13, 2026

https://www.popsci.com/science/world-end-overpopulation-doomsday-november-2026/
2•nephihaha•14m ago•1 comments

Not a Game of Snake

https://blog.neels.tech/blog/this-is-not-a-game-of-snake/
1•theblazehen•18m ago•0 comments

PC shipments fall 20.1 percent in "sharpest decline" since Q1 2023

https://arstechnica.com/information-technology/2026/10/pc-shipments-fall-20-1-percent-in-sharpest...
1•joozio•18m ago•1 comments

Show HN: We automated market Intel with a Statista-like engine for fashion

https://tfb.databoutique.com/
1•squatrito23•19m ago•1 comments

Tesla unveils Roadster by launching it off a ramp before flipping in midair

https://twitter.com/CollinRugg/status/2110901393238474863
1•MrBuddyCasino•20m ago•0 comments

Iaapa Expo Europe 2025 review

https://blooloop.com/theme-park/in-depth/iaapa-expo-europe-2025-review/
2•davidmartin_tga•20m ago•0 comments

AI Startup Character.ai Files for Bankruptcy – AI Bubble Bursting [video]

https://www.youtube.com/watch?v=kcMTe1AbvjY
2•baranul•21m ago•0 comments

I'm building SEPPY to destroy the trillion-dollar digital advertising market

https://demo.seppy.de/essayI/
1•KathiaGatterer•22m ago•0 comments

Employee-like access to METR by Anthropic for 3rd party assessment

https://www.anthropic.com/news/an-update-on-independent-evaluators
2•achow•23m ago•0 comments

Unity Mass-Suspends Accounts

1•appstorelottery•24m ago•0 comments

Super intelligent agents painting the world map one pixel at a time

https://warpaint.museworld.lol/
1•kevin11111•26m ago•1 comments

ASCII Theater – Stream free text-based movies in your terminal

https://ascii.theater
1•BjoernKW•27m ago•0 comments

Rise of the Shadow Man

https://workshop.vennfactory.com/p/rise-of-the-shadow-man
1•mooreds•29m ago•0 comments

How worried should we be about extinction risk from AI?

https://gowers.wordpress.com/2026/10/16/how-worried-should-we-be-about-extinction-risk-from-ai/
1•ColinWright•30m ago•0 comments

The Olympic sprinter now bedbound for 22 hours a day

https://www.bbc.com/sport/athletics/articles/crd6dj26v4e4o
1•mooreds•32m ago•0 comments

I spent 48 hours in SF hanging out with billionaires, data labs and AI founders

https://twitter.com/gregisenberg/status/2110414696037716372
3•layer8•36m ago•1 comments

Open Oncall: Open-Source Alternative to Devin Oncall

https://docs.agent-swarm.dev/docs/playbooks/open-oncall
2•tarasyarema•36m ago•1 comments

What's on That Access Port?

https://danielmangum.com/posts/whats-on-that-access-port/
1•hasheddan•38m ago•0 comments

Show HN: 63 media tools in a 54MB Rust app with local phone-to-PC transfer

https://formatif.net/formatif-pro
2•hadikaraki•40m ago•1 comments

Reap the processes your coding agents leave behind

https://github.com/AppulseSoftware/reaper
1•eelcow•42m ago•0 comments

Hyperoptimized Engineer 2026 [video]

https://www.youtube.com/watch?v=MhEL9cvLxQE
2•atzmzt•43m ago•0 comments

If a Switch is an ARM64-verse. Then ScarletNX is FEX but in reverse

https://scarletnx.github.io
1•mococa•47m ago•0 comments

Fixing C Strings with String Views

https://eliasebner.com/blog/guides/fixing-strings-in-c/
1•birdculture•48m ago•0 comments

The 800XL – By Paul Lefebvre – Goto 10

https://www.goto10retro.com/p/the-800xl
1•rbanffy•48m ago•0 comments

Becoming a stranger in my own field

https://mariya.fyi/posts/stranger-in-my-own-field
1•ot•49m ago•0 comments

Don't build a new SaaS. Fix the gaps in your 10-year-old one

https://www.reddit.com/r/SaaS/comments/1x7c0m8/dont_build_a_new_saas_fix_the_gaps_in_your/
1•nitingohel•49m ago•0 comments

Models know when they're reward hacking

https://www.goodfire.com/research/reward-hacking-activation-monitors
1•tie-in•51m ago•1 comments