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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!

Chasing the Hallucinations: KPMG's AI-Powered Attempt at "Redefining Excellence"

https://gptzero.me/news/investigations-kpmg/
1•antondd•1m ago•0 comments

Show HN: Jacobian Fingerprinting in LLM's

https://author2vec.com/jlens
1•tristenharr•2m ago•0 comments

Vivaldi 8.1: Rowing in calm waters

https://vivaldi.com/blog/vivaldi-on-desktop-8-1/
1•calebgcc•3m ago•0 comments

Finnish Supermarket truck appears in Khamenei funeral procession

https://www.helsinkitimes.fi/world-int/29028-k-group-branded-truck-appears-in-khamenei-funeral-pr...
1•helsinkiandrew•3m ago•0 comments

The US should pull out of the Middle East

https://phillipspobrien.substack.com/p/the-us-should-pull-out-of-the-middle
1•JumpCrisscross•7m ago•0 comments

97% of websites expose zero tools an AI agent can use

https://sitespeak.ai/research/ai-readiness-report-2026
2•kizum•11m ago•1 comments

Stop Lying to Your Cofounder

https://avivbenyosef.com/stop-lying-to-your-cofounder/
1•avivby•11m ago•0 comments

Show HN: Isnad – A Python framework that uses 1,200-yearold Islamic logic for AI

https://medium.com/@alizahidraja/can-a-1-200-year-old-trust-system-help-build-more-reliable-ai-88...
1•alizahidraja•11m ago•0 comments

Format Factory

https://formatfactory.io/
1•gregzeng95•11m ago•0 comments

Brown Professor Suspects Majority of His Class Used AI to Cheat

https://www.insidehighered.com/news/faculty/learning-assessment/2026/07/08/brown-professor-suspec...
2•red_admiral•13m ago•1 comments

Bonnie Tyler, singer of Total Eclipse of the Heart, dies aged 75

https://www.bbc.com/news/articles/cg5pd9z2487o
2•theanonymousone•16m ago•0 comments

The AI risk in marketing stacks inside orgs

https://singulr.ai/blog/the-hidden-ai-risk-in-your-marketing-stack-shadow-ai-automation-pipelines...
1•shivc•17m ago•0 comments

Process Is a Tool, Not a Virtue

https://blog.kevingoldsmith.com/2026/03/18/process-is-a-tool-not-a-virtue/
1•grepsedawk•17m ago•1 comments

Ask HK: Does it feel like the top models routinely dismiss your opinion/advice?

1•bridgettegraham•18m ago•1 comments

How to avoid dementia – what the science says

https://www.nature.com/articles/d41586-026-02098-z
2•doener•20m ago•0 comments

Relm – local LLMs as base-R objects, with interpretability

https://github.com/Vadale/R-ebirth
1•grauk•20m ago•0 comments

Tuta is making it easier to migrate all your emails to Tuta Mail

https://www.neowin.net/news/tuta-is-making-it-easier-to-migrate-all-your-emails-to-tuta-mail/
1•bundie•24m ago•0 comments

The UK plans to ban romantic AI chatbots for under-18s

https://blog.uehiro.ox.ac.uk/2026/06/the-uk-plans-to-ban-romantic-ai-chatbots-for-under-18s-young...
2•ilreb•26m ago•0 comments

Grok 4.5 Benchmark Results

https://artificialanalysis.ai/models/grok-4-5
1•theanonymousone•27m ago•0 comments

San Francisco homes sell for $1M above asking price amid AI boom

https://www.theguardian.com/us-news/2026/jul/07/san-francisco-home-sale-prices-ai
3•pseudolus•30m ago•0 comments

The Fediverse Grew Up. Its Sign-Up Page Didn't

https://casually.onl/article?slug=fediverse-grew-up-2026
2•doener•30m ago•1 comments

Questions for the Team During Onboarding

https://simonwillison.net/2026/Mar/6/ally-piechowski/
1•grepsedawk•31m ago•1 comments

My Thoughts on the Bun Rust Rewrite

https://andrewkelley.me/post/my-thoughts-bun-rust-rewrite.html
9•kristoff_it•31m ago•0 comments

Show HN: Humm – free, private realtime speech-to-text

https://humm.so/
1•welanes•32m ago•0 comments

M64 Controller Review

https://retrododo.com/m64-controller-review-the-n64-remote-perfected/
1•tosh•36m ago•0 comments

Show HN: Ved AI Voice Assistant

https://github.com/Krish6190/Ved-Test
1•Amigo112•37m ago•0 comments

If Microsoft sold off Xbox, who would even buy it?

https://www.theverge.com/games/962837/microsoft-xbox-spin-off-sell-divest-layoffs-asha-sharma
2•haunter•38m ago•1 comments

China Weighs Limits on the AI Models American Companies Love

https://www.wsj.com/tech/ai/china-weighs-limits-on-the-ai-models-american-companies-love-c3ad8f2b
1•JumpCrisscross•38m ago•0 comments

The Traverse of the GR20

https://mongr20.com/en/
1•altilunium•39m ago•0 comments

Bonnie Tyler latest: Legendary rock singer dies 'unexpectedly' in Portugal

https://news.sky.com/story/bonnie-tyler-latest-legendary-rock-singer-dies-in-portugal-13542742
1•Tomte•42m ago•0 comments