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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!

How to Save a Claude Chat as a PDF [video]

https://www.youtube.com/watch?v=TkucXHpChDE
2•quysala12•3m ago•0 comments

Eight irritating ways America has ruined this World Cup

https://inews.co.uk/sport/football/world-cup-america-eight-irritating-ways-4489438
2•jjgreen•4m ago•0 comments

The Internet I Grew Up with Doesn't Exist Anymore

https://cleberg.net/blog/internet.html
1•felixdoerp•7m ago•0 comments

TokenBudgeting: Our Conversations with Enterprises on Token Spend

https://newsletter.semianalysis.com/p/tokenbudgeting-our-conversations
1•felixdoerp•8m ago•0 comments

When Impressive Performance Gains Do Not Matter

https://blog.colinbreck.com/when-impressive-performance-gains-do-not-matter/
2•signa11•9m ago•0 comments

MacBook Air M4 for development: 1 year review

https://notnotp.com/notes/macbook-air-m4-for-dev/
1•chmaynard•13m ago•0 comments

Apple 'Hide My Email' Vulnerability Reveals Peoples' Real Email Addresses

https://www.404media.co/apple-hide-my-email-vulnerability-reveals-peoples-real-email-addresses/
2•sashk•14m ago•0 comments

Apple iPhone 18 Pro supplier list, parts and photos exposed in Tata data leak

https://www.reuters.com/business/media-telecom/apple-iphone-18-pro-supplier-list-parts-photos-exp...
2•aravpanwar•14m ago•0 comments

Building AGI Using Language Models (2020)

https://bmk.sh/2020/08/17/Building-AGI-Using-Language-Models/
1•rzk•18m ago•0 comments

Stop handwaving away nearly every petition that gains traction on this website

https://petition.parliament.uk/petitions/771707
2•robin_reala•18m ago•0 comments

Shoe Tray Forming Machine

https://eggtraytz.com/shoe-tray-forming-machine/
1•shuliymachinery•18m ago•1 comments

Transcribe.cpp – ggml speech-to-text inference engine

https://github.com/handy-computer/transcribe.cpp
1•sipjca•20m ago•0 comments

We put a Redis server inside our runtime

https://encore.dev/blog/redis-runtime
3•eandre•23m ago•0 comments

The YAML document from hell (2023)

https://ruuda.nl/2023/the-yaml-document-from-hell
1•vismit2000•23m ago•0 comments

Ask HN: Which GitHub features are needed in a code forge before you can migrate?

2•pksunkara•25m ago•1 comments

Asahi Linux 7.1 Progress Report

https://asahilinux.org/2026/06/progress-report-7-1/
40•pantalaimon•27m ago•2 comments

AI models' values are different from most people's

https://www.economist.com/briefing/2026/06/25/ai-models-values-are-very-different-from-most-peoples
2•felixdoerp•29m ago•0 comments

Universal Path Converter

https://universalpathconverter.com/
1•ankitg12•29m ago•0 comments

How Do Products Like LLM Gateways/VPN Handle User Payments?

1•Maxshot•30m ago•0 comments

Ask HN: How do you provide your AI agents with access to credentials/secrets?

2•pietz•31m ago•1 comments

Make AI Boring Again

https://charity.wtf/2026/06/24/make-ai-boring-again-xpost/
2•capestart•32m ago•0 comments

Alternative for Germany's academic reform plans

https://www.nature.com/articles/d41586-026-01496-7
1•i-blis•33m ago•0 comments

FocusGolf – a swing-analysis app I'm building as an HCP36 amateur

https://play.google.com/store/apps/details?id=com.mode.golf.app&hl=en
1•dmitrijsc•36m ago•0 comments

Pine64 launch $50 smart speaker for Home Assistant tinkerers

https://www.omgubuntu.co.uk/2026/06/pine64-pinevoice-riscv-smart-speaker-launch
20•edward•37m ago•4 comments

Apple accelerates app development with new intelligence frameworks

https://www.apple.com/in/newsroom/2026/06/apple-aids-app-development-with-new-intelligence-framew...
1•adithyaharish•37m ago•0 comments

Trap–Bath Split

https://en.wikipedia.org/wiki/Trap%E2%80%93bath_split
1•YeGoblynQueenne•38m ago•0 comments

I built a native iOS video player for local media and SMB/Plex

https://apps.apple.com/us/app/lux-video-player-hd-media/id6762520464
1•Moonarkh•45m ago•0 comments

AI Engineering Roadmap

https://aiengineeringfromscratch.com/prereqs.html
1•rohitghumare•45m ago•0 comments

Using a local iPhone MCP server to plan Apple Watch workouts with Codex

https://bernhardhering.de/blog/ask-my-health-codex-workout-plan/
1•boernei•48m ago•0 comments

AI Agent vs. Cron

1•vasanthps•48m ago•0 comments