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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: App to spoof GPS location on iOS without jailbreaking

https://github.com/acheong08/ios-location-spoofer
1•acheong08•4m ago•0 comments

Fish Shell

https://fishshell.com/
2•RyanShook•8m ago•0 comments

Ask HN: How do you catch silent logic bugs that don't crash?

1•vortexshadow•9m ago•0 comments

GTA 6's Dynamic Economy Will Change Open‑World Games Forever

https://techfusiondaily.com/gta-6-dynamic-economy/
2•nelkazzu•14m ago•0 comments

Examplefile – Sample Document File Formats

https://www.examplefile.com/document
1•petethomas•16m ago•0 comments

Show HN: DefendFlow Domain Security Board – live scans of popular sites

1•riyao_lin•19m ago•0 comments

Show HN: Headroom (OSS): Cuts LLM costs by 85%

https://github.com/chopratejas/headroom
1•chopratejas•20m ago•1 comments

Breaking the Linearity Barrier: Recursive Swarms for Long-Horizon AI Engineering

https://www.blankline.org/research/horizon-mode
1•satvikpendem•22m ago•0 comments

Data Activation Thoughts

https://galsapir.github.io/sparse-thoughts/2026/01/17/data_activation/
1•galsapir•26m ago•0 comments

Show HN: My way – 18-agent autonomous workflow for ClaudeCode – issues to deploy

https://github.com/avifenesh/awesome-slash
2•anotherCodder•30m ago•0 comments

The life of a playboy publisher who shaped 20th-century literature

https://www.washingtonpost.com/books/2026/01/09/bennett-cerf-biography-nothing-random-feldman-boo...
1•benbreen•33m ago•0 comments

Revisiting Brat Summer: Artists, politicians, and the summer of 2024

https://thelastwave.substack.com/p/revisiting-brat-summer
2•johanam•34m ago•0 comments

Build Your Own AI Coding Agent (Full Guide) [video]

https://www.youtube.com/watch?v=3GjE_YAs03s
2•kburman•38m ago•0 comments

Umarell – men of retirement age who spend their time watching construction sites

https://en.wikipedia.org/wiki/Umarell
3•gurjeet•39m ago•0 comments

The SaaS Selloff: AI and Interest Rates

https://davefriedman.substack.com/p/the-saas-selloff-ai-and-interest
4•stosssik•41m ago•0 comments

BioNeMo Platform Accelerate AI-Driven Drug Discovery

https://nvidianews.nvidia.com/news/nvidia-bionemo-platform-adopted-by-life-sciences-leaders-to-ac...
1•gmays•42m ago•0 comments

How do I stop participating?

https://geohot.github.io//blog/jekyll/update/2026/01/18/how-do-i-stop.html
3•JuanJohnJames•45m ago•0 comments

AI Sandbox for Claude Code CLI with Node and Python SDKs

https://sandbox.stateset.app
2•domsteil•52m ago•0 comments

You Need More AWS Accounts Than You Think

https://cloudposse.com/blog/you-need-more-aws-accounts-than-you-think
4•mooreds•53m ago•4 comments

Show HN: Gollem – Go framework for agentic AI app with MCP and built-in tools

https://github.com/m-mizutani/gollem
1•masa00•59m ago•0 comments

A new way to call C from Java: how fast is it?

https://lemire.me/blog/2026/01/17/a-new-way-to-call-c-from-java-how-fast-is-it/
1•mfiguiere•1h ago•1 comments

How to Read a Room in 5 Minutes

https://oedmethod.substack.com/p/how-to-read-a-room-in-5-minutes
1•truenfel•1h ago•0 comments

AI and Corporate Capture of Knowledge

https://www.schneier.com/blog/archives/2026/01/ai-and-the-corporate-capture-of-knowledge.html
5•fosco•1h ago•0 comments

Algebra will return to S.F. middle schools after more than a decade

https://www.sfchronicle.com/bayarea/article/algebra-return-sf-middle-schools-21299694.php
1•mikhael•1h ago•0 comments

MIT's Computer Systems Security (2024)

https://css.csail.mit.edu/6.858/2024/
2•barishnamazov•1h ago•0 comments

More HTTP/3 focus, one back end less

https://daniel.haxx.se/blog/2026/01/17/more-http-3-focus-one-backend-less/
2•todsacerdoti•1h ago•0 comments

The Born-XML Shakespeare Edition: The View from the New Oxford Shakespeare

http://www.gabrielegan.com/publications/Egan2019e.htm
1•mmooss•1h ago•0 comments

IRISC: An ARMv7 assembly interpreter and computer architecture simulator

https://polysoftit.co.uk/irisc-web/
5•rtybanana•1h ago•1 comments

Show HN: Agam Space – Self-hosted, zero-knowledge, E2EE file storage

https://github.com/agam-space/agam-space
2•rameshl•1h ago•0 comments

Astronomers spot one of the largest spinning structures found in the Universe

https://www.ast.cam.ac.uk/news/astronomers-spot-one-largest-spinning-structures-ever-found-universe
2•hhs•1h ago•0 comments