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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: Kuse Cowork – An open source, BYOK alternative to Claude Cowork

https://github.com/kuse-ai/kuse_cowork
1•rctstudio2018•28s ago•0 comments

Washington's Covert Strike at the Heart of Iran's Power Structure

https://open.substack.com/pub/ajmals/p/us-strategic-shock-signal-to-iran
1•Gym-Berlin•3m ago•0 comments

Show HN: A Tailwind component generator focused on design quality, not AI "slop"

https://inspi.me/
1•yogourt•4m ago•1 comments

Show HN: Free tool to see how your thumbnail looks like on YouTube

https://www.awesomefreetools.xyz
1•awesomepotato•5m ago•0 comments

Alan MacMasters Hoax

https://en.wikipedia.org/wiki/Alan_MacMasters_hoax?wprov=sfti1
1•m-hodges•6m ago•0 comments

I fashioned each Fediverse instance into a star

https://100kstars.contained.love/
1•r0k1s_i•7m ago•0 comments

Bun Is Fast, Until Latency Matters for Next.js Workloads

https://blog.platformatic.dev/bun-is-fast-until-latency-matters-for-nextjs-workloads
1•gempir•7m ago•0 comments

Teaching RL Replay Buffers to Remember Long-Horizon Rewards (PyTorch)

https://domezsolt.substack.com/p/hippotorch-teaching-rl-agents-to
1•ashby_r•10m ago•0 comments

Web3 writing platform for Web3 writers

https://www.sigle.io/
1•janandonly•14m ago•0 comments

Which cryptexes does macOS Tahoe load?

https://eclecticlight.co/2026/01/19/which-cryptexes-does-macos-tahoe-load/
2•chmaynard•15m ago•0 comments

Looper.sh: yet another coding loop script

https://www.nibzard.com/looper-article
1•nkko•15m ago•0 comments

Why India's plan to make AI companies pay for training data should go global

https://restofworld.org/2026/india-ai-data-license-fee/
1•i7l•15m ago•0 comments

importmap.lock: A Lockfile for the Web

https://nesbitt.io/2026/01/19/importmap-lock.html
1•chmaynard•17m ago•0 comments

Show HN: Appa (POC): Self-shipping task queue

https://github.com/kxzk/appa
1•beigebrucewayne•19m ago•1 comments

Quantum 'alchemy' made feasible with excitons

https://phys.org/news/2026-01-quantum-alchemy-feasible-excitons.html
1•pseudolus•20m ago•0 comments

What's Worrying Jonathan Haidt Now?

https://calnewport.com/whats-worrying-jonathan-haidt-now/
2•chmaynard•20m ago•0 comments

40% of Kids Can't Read and Teachers Are Quitting [video]

https://www.youtube.com/watch?v=XTugyu2F0pc
2•squillion•22m ago•0 comments

China's birth rate hits record low as population continues to shrink

https://www.bbc.com/news/articles/c79r7v7qr53o
1•pseudolus•22m ago•0 comments

DeGoogled Phones, Made in Europe

https://tuta.com/blog/degoogled-phones
2•jruohonen•23m ago•1 comments

Nvidia Contacted Anna's Archive to Access Books

https://torrentfreak.com/nvidia-contacted-annas-archive-to-secure-access-to-millions-of-pirated-b...
3•antonmks•29m ago•2 comments

Cara Menonaktifkan Akun Shopee [Spinjam] & Menghapus Akun SPinjam Shopee-Pinjam?

1•begundal•30m ago•0 comments

Grok's biggest danger isn't what it says – it's where it lives

https://restofworld.org/2026/grok-ai-danger/
1•brandrick•32m ago•1 comments

Turso is an in-process SQL database, compatible with SQLite

https://github.com/tursodatabase/turso
1•marklit•35m ago•0 comments

A retail dark pattern worked on me

https://rubenerd.com/a-dark-pattern-worked-on-me/
2•7777777phil•37m ago•0 comments

Show HN: Kacet – a freelancer marketplace with crypto-native payments

https://kacet.com/
8•wrux•39m ago•3 comments

Show HN: JSON Purrser – A JSON viewer with smart field detection

https://www.jsonpurrser.com/
1•one_man_studio•43m ago•0 comments

Show HN: Synth Data Studio Open-source synthetic data with differential privacy

https://github.com/Urz1/synthetic-data-studio
1•Sadam_H•44m ago•1 comments

Show HN: Interactive visualization of relationship mechanics in Dead Plate

https://deadplate.net/
1•causalzap•47m ago•0 comments

Smart Response Technology: Transforming Digital Interaction

https://techvastonline.blogspot.com/2026/01/smart-response-technology-transforming.html
1•Silvaaaa•48m ago•1 comments

The Google Pixel 3 Is a Good Phone. But Maybe Phones Have Gone Too Far. (2018)

https://www.buzzfeednews.com/article/mathonan/google-pixel-3-review-android
2•viralpoetry•48m ago•0 comments