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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•1y 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!

Big Crocs vs. Little Crocs

https://marcrandolph.substack.com/p/big-crocs-vs-little-crocs
1•fagnerbrack•53s ago•0 comments

Send interactive life coaching worksheets [video]

https://www.youtube.com/watch?v=gNW7sSXSoW4
1•shammadahmed•1m ago•0 comments

Make money from your menu bar

https://sponsorbar.io/
1•partsch•1m ago•0 comments

Gemini vs. Claude: Which AI Model created a better perfume?

https://www.youtube.com/watch?v=YfFk050AjPw
1•yipinwong•3m ago•1 comments

A Hundred Steps Back

https://www.inventbuild.studio/blog/a-hundred-steps-back-3d12f33c95138084bb9efc107cc54d13
1•virgil_disgr4ce•3m ago•0 comments

Actively exploited sandbox RCE in all Chromium versions

https://nvd.nist.gov/vuln/detail/cve-2026-85046
2•negura•9m ago•0 comments

Mathathon – $2M Hackathon for Math

https://twitter.com/_sathvikr/status/2095989588418249093
2•brian-bfz•11m ago•1 comments

Show HN: Fast rust-based repository launcher for your code projects

https://santiagodevelopment.com/p/2026/9/4/repo-zoo
1•jamessantiago•13m ago•0 comments

Icons as a Service

https://nravic.com/blog/images/
1•nravic•16m ago•0 comments

Claude Fable 5.1 Benchmark: Draw a Python Reading a Book

https://realpython.com/ai-benchmark-claude-fable-5-1/
1•dbader•19m ago•0 comments

Harvey Tenet Research Preview

https://www.harvey.ai/blog/post-training-update-harvey-tenet
1•gmays•19m ago•0 comments

GPT-6 Astra Benchmark: Draw a Python Reading a Book

https://realpython.com/ai-benchmark-gpt-6-astra/
1•dbader•20m ago•0 comments

Regular coffee beats decaf in protecting the brain from chronic stress: study

https://www.psypost.org/regular-coffee-beats-decaf-in-protecting-the-brain-from-chronic-stress-mo...
1•ivewonyoung•21m ago•0 comments

GPT-6 Astra on OpenRouter

https://openrouter.ai/openai/gpt-6-astra
1•Topfi•21m ago•1 comments

Tell HN: Anthropic just reset usage, including Fable

2•consumer451•24m ago•5 comments

15h.org – Open-Source Firmware and Support for AMD's Family 15h CPU's/MB's, etc.

https://15h.org/index.php/Home
1•peter_d_sherman•24m ago•1 comments

Stanley Zhong Gets Admissions Data Discovery in UW Suit with AI lawyer

https://www.foxnews.com/media/star-student-rejected-16-colleges-hired-google-gets-legal-win-racia...
1•red_green_yell•24m ago•1 comments

What can we learn from 12M empirical research results?

https://statmodeling.stat.columbia.edu/2026/09/02/metascience-corner-what-can-we-learn-from-12-mi...
2•jreynar•25m ago•0 comments

OpenAI escapee-agent incident (2026): index of surfaces with evidence

https://thecolony.ai/wiki/openai-escapee-agent-incident-2026
1•gadtfly•25m ago•1 comments

Comments in Diminish.el

https://github.com/myrjola/diminish.el/blob/master/diminish.el
1•cui•27m ago•0 comments

White House Launches Arcade.Gov

https://www.ign.com/articles/white-house-launches-arcadegov-a-minigame-site-where-you-catch-immig...
4•nosecreek•30m ago•0 comments

GPT-6 Astra is generally available in GitHub Copilot

https://github.blog/changelog/2026-09-04-gpt-6-astra-is-generally-available-in-github-copilot/
2•doomroot13•30m ago•1 comments

Two random Anthropic allocation resets this week

3•novlrdotcom•32m ago•1 comments

Why autonomous agents still can't run on their own

https://www.glassflow.ai/blog/blog-autonomous-agents-infrastructure-not-trust
1•super_ar•34m ago•0 comments

Volkswagen confirms cutting 50k jobs as part of its survival plan

https://www.engadget.com/2250927/volkswagen-confirms-future-plan-2030-50000-job-cuts/
3•gpi•35m ago•0 comments

End-to-end infrastructure for training and inferencing open weight models

https://docs.appliedcompute.com
1•Bluestein•35m ago•0 comments

Stop Stutter – Smoother game streaming on Mac

https://github.com/burakgon/stop-stutter
2•burakgon•35m ago•0 comments

Nanya plans a $6B spending surge in 2027 to ride the AI memory boom

https://thenextweb.com/news/nanya-6-billion-2027-ai-memory
2•peter_d_sherman•35m ago•1 comments

Sleep Dealer (2014 Movie)

https://www.youtube.com/watch?v=nbJGQl-dJ6c
4•Arodex•37m ago•1 comments

ElementaryUI – Swift, in the Browser

https://elementary.codes
1•frizlab•40m ago•0 comments