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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!

Show HN: `tc` like `wc` but for LLM tokens

https://github.com/jamierpond/tokencount
1•jamiepond•43s ago•0 comments

Training an LLM to Play Diplomacy with RL

https://www.benglickenhaus.com/blog/diplomacy_rl_part_1
1•pawalt•2m ago•0 comments

Show HN: An LLM-optimized programming language

https://github.com/ImJasonH/ImJasonH/blob/main/articles/llm-programming-language.md
2•ImJasonH•4m ago•0 comments

Data Trust (or lack of it) is many paper cuts, not one BIG error

https://www.rudderstack.com/blog/data-trust-clickstream-discrepancy/
1•soumyadeb•4m ago•0 comments

Ask HN: How to automate aesthetic photo cropping? (CV/AI)

1•icons•6m ago•0 comments

Debian goes retro with a spatial desktop that time forgot

https://www.theregister.com/2026/01/09/desktop_classic_system/
2•mmphosis•13m ago•0 comments

Official TypeScript Cheat Sheets

https://www.typescriptlang.org/cheatsheets/
1•doodlesdev•16m ago•0 comments

Himalayas bare and rocky after reduced winter snowfall, scientists warn

https://www.bbc.com/news/articles/clyndv7zd20o
3•koolhead17•18m ago•0 comments

Rethinking Helix

https://asta.boserup.eu/forest/rethinking-helix/
1•todsacerdoti•20m ago•0 comments

What the actual science says about "brain rot" [video]

https://www.youtube.com/watch?v=tdIUMkXxtHg
1•mgh2•20m ago•0 comments

Hepatic adaptation to chronic metabolic stress primes tumorigenesis

https://www.cell.com/cell/fulltext/S0092-8674(25)01366-2
1•PaulHoule•24m ago•0 comments

Code Is Cheap Now. Software Isn't

https://www.chrisgregori.dev/opinion/code-is-cheap-now-software-isnt
4•fs_software•25m ago•0 comments

Malaysia and Indonesia block Musk's Grok over sexually explicit deepfakes

https://www.bbc.com/news/articles/cg7y10xm4x2o
2•breve•25m ago•0 comments

Show HN: The Thiele Machine – Coq-Verified Computational Model Beyond Turing

https://github.com/sethirus/The-Thiele-Machine
3•nwthiele•29m ago•0 comments

Barista: Serving up fresh stats for your Claude Code sessions

https://github.com/pstuart/pstuart/tree/main/barista
1•handfuloflight•30m ago•0 comments

Show HN: LifeOps – Relationship intelligence for developers (local-first)

https://github.com/senguttuvang/LifeOps-CLI
1•seng•31m ago•0 comments

CES 2026: "Worst in Show" – Calling Out Gadgets That Make Things Worse

https://www.ifixit.com/News/115344/worst-in-show-returns-at-ces-2026-calling-out-gadgets-that-mak...
2•gnabgib•32m ago•0 comments

Can Shawn Levy Resuscitate "Star Wars?"

https://www.nytimes.com/2026/01/08/movies/shawn-levy-star-wars-stranger-things.html
4•bookofjoe•38m ago•1 comments

Silent Rebuilds: Keeping Container CVE Counts Near-Zero

https://www.bretfisher.com/silent-rebuilds/
1•ropable•58m ago•1 comments

Anthropic bans xAI from using Claude in Cursor

https://xcancel.com/kyliebytes/status/2009686466746822731
5•Palmik•1h ago•1 comments

Federal prosecutors open criminal investigation into the Fed and Jerome Powell

https://www.cnn.com/2026/01/11/business/federal-prosecutors-criminal-investigation-federal-reserv...
11•washedup•1h ago•1 comments

Critical Analysis of Air Up's Scientific Marketing Claims

https://zenodo.org/records/18197315
2•OrthoBottle•1h ago•1 comments

Uncrossy

https://uncrossy.com/
9•dgacmu•1h ago•3 comments

Show HN: Constela – Build web pages using JSON instead of JavaScript

https://github.com/yuuichieguchi/constela
1•yuu1ch13•1h ago•0 comments

Which programming languages are most token-efficient?

https://martinalderson.com/posts/which-programming-languages-are-most-token-efficient/
23•tehnub•1h ago•9 comments

Fed Chair Powell says he's under criminal investigation

https://www.cnbc.com/2026/01/12/fed-jerome-powell-criminal-probe-nyt.html
9•victor106•1h ago•1 comments

Men Who Are Super Competitive About Sleep

https://www.wsj.com/style/fashion/competitive-about-sleep-gear-sleepwear-76761041
3•lxm•1h ago•1 comments

Karmic Tail Calculator – a free, explainable Matrix of Destiny tool

https://destiny-matrix.cc/en/tool/karmic-tail-calculator/
1•yxchen1994•1h ago•1 comments

AI models were given four weeks of therapy: the results worried researchers

https://www.nature.com/articles/d41586-025-04112-2
3•andromaton•1h ago•4 comments

I made a simple agent for PR reviews. Don't use it

https://xeiaso.net/blog/2026/reviewbot/
3•xena•1h ago•1 comments