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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•8mo 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!

Gas Town is a glimpse into the future

https://johncodes.com/archive/2026/01-16-a-glimpse-into-the-future/
1•jpmcb•3m ago•0 comments

Building a Quake PC

https://fabiensanglard.net/quake_pc/index.html
2•zdw•4m ago•0 comments

China Clamps Down on High-Speed Traders, Removing Servers

https://www.bloomberg.com/news/articles/2026-01-16/china-clamps-down-on-high-speed-traders-removi...
3•petethomas•10m ago•0 comments

Astronaut Charlie Duke (2021) [video]

https://www.youtube.com/watch?v=U7jWk0u4K-E
1•ceroxylon•18m ago•1 comments

I skipped Japan's university exam to write a "computational metaphysics" exam

2•fumi2026•20m ago•0 comments

Grand Illusion

https://chrishedges.substack.com/p/grand-illusion-read-by-eunice-wong
1•chmaynard•23m ago•0 comments

Artisanal Code

https://sunnyamrat.com/posts/2026-01-17-artisanal-code/
2•sunnyam•23m ago•0 comments

Lucasfilm President Kathleen Kennedy to step down

https://www.latimes.com/entertainment-arts/business/story/2026-01-15/lucasfilm-president-kathleen...
3•iancmceachern•25m ago•1 comments

Stay-at-home sons are here – and they're not going anywhere

https://www.washingtonpost.com/style/trends/2026/01/16/stay-at-home-sons/
2•blondie9x•26m ago•2 comments

Show HN: Agent Coworking,Multi-agent networks for AI collaboration (open source)

https://openagents.org/showcase
2•snasan•27m ago•0 comments

Ask HN: Can companies claim copyright over their LLM-generated codebases?

2•mks_shuffle•31m ago•1 comments

GitHub Copilot now supports OpenCode

https://github.blog/changelog/2026-01-16-github-copilot-now-supports-opencode/
4•todsacerdoti•34m ago•0 comments

Show HN: I gave AI persistent memory. Someone didn't like that

1•Shaximus•34m ago•0 comments

Dispute with Russian billionaire leads to 4 Bay Area bankruptcies

https://www.sfgate.com/tech/article/russian-billionaire-four-biotech-bankruptcies-21299298.php
4•nradov•36m ago•0 comments

Crypto grifters are recruiting open-source AI developers

https://www.seangoedecke.com/gas-and-ralph/
1•lalitmaganti•43m ago•1 comments

GoodJob, Solid Queue, Sidekiq, Active Job, in 2026

https://island94.org/2026/01/goodjob-solid-queue-sidekiq-active-job-in-2026
1•thunderbong•45m ago•0 comments

Ben Affleck and Matt Damon on the Limits of AI in Filmmaking [video]

https://www.youtube.com/watch?v=O-2OsvVJC0s
4•karakoram•46m ago•0 comments

Every Inch Matters

https://mercurialsolo.substack.com/p/every-inch-matters
1•mercurialsolo•47m ago•1 comments

Chinese Fishing Boats Form Sea Barriers

https://www.nytimes.com/interactive/2026/01/16/world/asia/china-ships-fishing-militia-blockade.html
6•SubiculumCode•47m ago•3 comments

Video Analysis of ICE Shooting Sheds Light on Contested Moments

https://www.nytimes.com/2026/01/15/video/ice-shooting-renee-good-minneapolis-videos.html
4•treetalker•53m ago•0 comments

Alabama Snowfall Forecast

https://ema.alabama.gov/2026/01/15/thursday-afternoon-update-on-possible-snowfall-this-weekend/
1•qwertyuiop_•59m ago•0 comments

Show HN: Making Claude Code sessions link-shareable

3•reflectivetrap•1h ago•0 comments

Claude Code sessions are now link-shareable

https://github.com/OmkarKovvali/claude-session-share
1•reflectivetrap•1h ago•1 comments

Nearly 5M Accounts Removed Under Australia's New Social Media Ban

https://www.nytimes.com/2026/01/15/world/australia/social-media-ban-australia.html
4•bookofjoe•1h ago•1 comments

Anything Will Work (In AI)

https://publish.obsidian.md/ueaj/Machine+Learning/Theory/Anything+WILL+work
1•qouteall•1h ago•0 comments

Matthew McConaughey trademarks catchphrase in bid to beat AI fakes

https://www.theguardian.com/film/2026/jan/15/matthew-mcconaughey-trademarks-all-right-all-right-a...
5•puttycat•1h ago•1 comments

ClickHouse Handles Strings

https://rushter.com/blog/clickhouse-strings/
2•gm678•1h ago•1 comments

Drone Hacking Part 1: Dumping Firmware and Bruteforcing ECC

https://neodyme.io/en/blog/drone_hacking_part_1/
3•tripdout•1h ago•0 comments

Shamash an IntelliJ plugin and CLI to enforce JVM architecture boundaries

https://github.com/aalsanie/shamash
1•aalsanie•1h ago•0 comments

Plunging US Birth Rate Leaves Too Many Colleges with Too Few Kids

https://www.bloomberg.com/graphics/2026-college-enrollment-cliff/
20•toomuchtodo•1h ago•7 comments