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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!

Trump's "island-seizing" rhetoric pushes Greenland into spotlight

http://eng.chinamil.com.cn/2025xb/O_251451/16438612.html
1•KnuthIsGod•27s ago•0 comments

Physical AI: robotics are poised to revolutionise business

https://www.ft.com/content/3449e77c-721b-4fc9-8082-c584d8f74848
1•JeanKage•2m ago•0 comments

Show HN: Turn Google Sheets into Website Widgets

https://shareables.ai/
1•Ryanwalker64•2m ago•1 comments

Chinese People's Liberation Army: Why Is the US So Interested in Greenland?

http://eng.chinamil.com.cn/2025xb/O_251451/16438210.html
1•KnuthIsGod•5m ago•0 comments

Why ALTER TABLE is such a problem for SQLite

https://www.sqlite.org/lang_altertable.html#why_alter_table_is_such_a_problem_for_sqlite
1•birdculture•8m ago•0 comments

Mozilla makes over 680M dollars in revenue in 2024

https://www.soeren-hentzschel.at/mozilla/mozilla-umsatz-2024/
1•speckx•8m ago•0 comments

The Grim Trigger

https://en.wikipedia.org/wiki/Grim_trigger
2•limbicsystem•10m ago•0 comments

For Russia, Greenland offers an 'ideal solution' to its Ukraine problemX

https://www.politico.eu/article/russia-greenland-offer-ideal-solution-ukraine-problem/
2•KnuthIsGod•10m ago•0 comments

Are 100k backlinks useful for early discovery?

https://300aidirectories.com/seo-boost
1•HansP958•11m ago•1 comments

India B788 at Ahmedabad on Jun 12th 2025, lost height shortly after takeoff

https://avherald.com/h?article=528f27ec&opt=0
1•mindracer•13m ago•0 comments

Students at Arizona school built a full-scale replica of ENIAC

https://www.theregister.com/2026/01/21/eniac_model_build/
2•sohkamyung•15m ago•0 comments

Benchmarking LLM Accuracy in Real-World API Orchestration

https://orbitalhq.com/blog/2026-01-20-agentic-orchestration-research-paper
1•martypitt•15m ago•0 comments

60 FPS AI-generated worlds you can play

https://www.overworld.stream/
1•ggsp•15m ago•1 comments

What Isaac Roberts Saw Without a Space Telescope

https://hackaday.com/2026/01/20/what-isaac-roberts-saw-without-a-space-telescope/
1•beardyw•16m ago•0 comments

Ask HN: How to Comeback in 2026?

1•SRMohitkr•17m ago•0 comments

Snap reaches settlement in social media addiction lawsuit

https://techcrunch.com/2026/01/20/snap-reaches-settlement-in-social-media-addiction-lawsuit/
1•speckx•20m ago•0 comments

RAM shortage chaos expands to GPUs, high-capacity SSDs, and even hard drives

https://arstechnica.com/gadgets/2026/01/ram-shortage-chaos-expands-to-gpus-high-capacity-ssds-and...
3•mariuz•23m ago•0 comments

The State of WebAssembly – 2025 and 2026

https://platform.uno/blog/the-state-of-webassembly-2025-2026/
1•pjmlp•24m ago•0 comments

I Made Zig Compute 33M Satellite Positions in 3 Seconds. No GPU Required

https://atempleton.bearblog.dev/i-made-zig-compute-33-million-satellite-positions-in-3-seconds-no...
2•signa11•25m ago•0 comments

Stopping Wall Street from Competing with Main Street Homebuyers

https://www.whitehouse.gov/presidential-actions/2026/01/stopping-wall-street-from-competing-with-...
1•KoftaBob•26m ago•0 comments

Remote authentication by-pass in inetutils-telnetd

https://www.openwall.com/lists/oss-security/2026/01/20/2
1•s3krit•26m ago•0 comments

SETI Home Is in Hiberation

https://setiathome.berkeley.edu/
2•keepamovin•27m ago•0 comments

Real programming vs. interviews: A dyslexic perspective

1•gcv•27m ago•0 comments

Mongoose – network library for C/C++

https://mongoose.ws/documentation/
1•smartmic•32m ago•0 comments

Building your own efficient uint128 in C++

https://solidean.com/blog/2026/building-your-own-u128/
3•fanf2•34m ago•0 comments

Leave X – Protect Democracy

https://leavex.eu
1•robin_reala•35m ago•0 comments

Religious affiliation of members of 118th Congress [pdf]

https://www.pewresearch.org/religion/wp-content/uploads/sites/7/2022/12/PF_2023.01.03_congress_LI...
2•KoftaBob•36m ago•0 comments

Vibe coding creates exponential technical debt (forbes)

https://www.forbes.com/sites/joetoscano1/2026/01/20/developers-use-ai-coding-tools-to-get-started...
1•cumo•37m ago•0 comments

Agent API for Claude Code / Claude Agent SDK

2•waterli•39m ago•0 comments

Connecting Claude Code to OpenAgents Networks

https://openagents.org/blog/posts/2026-01-15-connecting-claude-code-to-openagents-networks
3•snasan•41m ago•1 comments