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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!

Show HN: Common Ground. A culture neutral daily word puzzle

https://commonground.games/
1•stephendl•1m ago•0 comments

Show HN: Open-source ML that predicts knife steel properties from composition

https://github.com/Steel-predictor-project/Steel-predictor
1•p-s-v•1m ago•0 comments

I Like Enums, but I've Stopped Calling Them Closed

https://blog.dochia.dev/blog/api_enums/
1•ludovicianul•1m ago•0 comments

Show HN: Anti AI AI Club

https://antiaiaiclub.pages.dev/
1•estelzhao•2m ago•0 comments

Messier: A High-Resolution Corpus for Cross-Benchmark Agent Evaluation

https://arxiv.org/abs/2607.25891
2•root-parent•2m ago•0 comments

Goodbye WordPress, Hello Pure Blog

https://cafelog.fr/goodbye-wordpress-hello-pure-blog
1•speckx•2m ago•0 comments

A better way to turn 2D designs into 3D models for rapid prototyping

https://news.mit.edu/2026/turning-2d-designs-into-3d-models-for-rapid-prototyping-0716
2•JeanKage•3m ago•0 comments

Android malware detection collapses when the context stage comes out

https://www.helpnetsecurity.com/2026/07/29/android-malware-detection-research/
1•root-parent•3m ago•0 comments

AGI Singer: The Song of AGI Constitution Chapter One – Origin Integrity

https://medium.com/@miho999lv/the-song-of-agi-constitution-chapter-one-origin-integrity-87db0c4d2425
1•miho999lv•3m ago•0 comments

Visual prompt engineering for video models

https://arxiv.org/abs/2607.25537
2•root-parent•4m ago•0 comments

Show HN: How I pivot product logic. In production. Fast [video]

https://vimeo.com/1200036752
1•zeguru•4m ago•0 comments

Kalshi attacks a Wisconsin law banning election bets as 'voter suppression'

https://www.npr.org/2026/07/27/nx-s1-5905360/kalshi-wisconsin-election-betting-prediction-markets
3•hn_acker•5m ago•0 comments

MazeBench: Open-world benchmark for long term planning, visual spatial reasoning

https://mazebench.com/
1•hardmaru•6m ago•0 comments

Building the Automated AGI Lab: Core Automation's Jerry Tworek and Rohan Anil [video]

https://www.youtube.com/watch?v=2RJiaf0SY8s
1•binyu•6m ago•0 comments

Using AI to Strengthen Learning, Not Replace It

https://studywisdom.co.uk/ai-study-strategies-choosing-tools-that-strengthen-learning/
1•behindai•7m ago•0 comments

Show HN: Gitwhy – links AI coding sessions to Git commits before deletion

https://github.com/mehrtam/gitwhy
1•mehrtan•7m ago•0 comments

Qualcomm Completes Acquisition of Modular

https://www.modular.com/blog/qualcomm-completes-acquisition-of-modular
2•melodyogonna•8m ago•0 comments

Laravel Announces a First-Party Language Server (LSP)

https://github.com/laravel/lsp
3•ahmd•8m ago•0 comments

Russia Charges Telegram's Founder with Facilitating Terrorism

https://www.nytimes.com/2026/07/29/world/europe/telegram-russia-pavel-durov.html
2•donohoe•8m ago•0 comments

Show HN: Overengineered Calculator: Zig and QBE

https://tomekw.com/overengineered-calculator-zig-qbe/
1•tomekw•9m ago•0 comments

Show HN: I linked genes, diseases, and environmental exposures by US County

https://genarch.org/
4•kiaansaraiya•9m ago•1 comments

Cloister – isolated Claude Code and Codex, one cell per company

https://github.com/alxpolan/cloister
1•alexpolan•9m ago•0 comments

Light Phone Flip

https://www.thelightphone.com/lightflip
1•surprisetalk•10m ago•0 comments

Show HN: Estimatle, a daily number guessing game

https://estimatle.com/
1•oliwary•10m ago•1 comments

Most Voice Phishing Advice Is Outdated

https://www.callstrike.ai/voice-phishing-simulator
1•gyanchawdhary•10m ago•0 comments

Agent and RAG for Obsidian, Need Feedback

1•athrv_shrn•10m ago•0 comments

Why Do We Tolerate Elon Musk's Racist Commentary?

https://www.nytimes.com/2026/07/29/opinion/elon-musk-far-right-remigration.html
4•cdrnsf•11m ago•1 comments

FSR4.1 and CAD Available for Steam Machine

https://store.steampowered.com/news/group/45479024/view/698770449667981836
2•HelloUsername•11m ago•0 comments

US diners avoid restaurants as Explosive Diarrhea fears cut sales

https://www.reuters.com/legal/litigation/us-diners-avoid-restaurants-cyclosporiasis-fears-cut-let...
2•cramer4next•11m ago•0 comments

Burnham's First Week Redraws the Map of UK Tech Governance

https://www.techpolicy.press/burnhams-first-week-redraws-the-map-of-uk-tech-governance/
1•cdrnsf•12m ago•0 comments