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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!

Solar panel power generation calculator, taking into account weather conditions

https://specled.com/en/w/calculating-the-position-performance-and-payback-of-solar-panels/
1•Specled•35s ago•1 comments

KindaRails2Shell attack details and tools to perform a forensic investigation

https://github.com/rails/rails-forensics-CVE-2026-66066
1•ezekg•1m ago•0 comments

Starbucks bet big on an AI tool; 9 months later, it pulled the plug

https://www.fastcompany.com/91572019/starbucks-bet-big-ai-tool-national-scale-9-months-inventory-...
1•speckx•1m ago•0 comments

Microsoft is about to kill my favorite Edge feature – and Copilot is to blame

https://www.windowscentral.com/software-apps/microsoft-is-about-to-kill-my-favorite-edge-feature-...
1•realsarm•2m ago•0 comments

Codeberg Degraded Service

https://status.anoxinon.de/status/anoxinon
1•pelasaco•4m ago•1 comments

Run Kimi K3 using 29 GB of RAM at 0.50 tok/s

https://github.com/sqliteai/waste
1•marcobambini•5m ago•0 comments

The physics of Docker build caching

https://www.blacksmith.sh/blog/the-physics-of-docker-build-caching
3•piobio•6m ago•0 comments

Cookie Chaos: How to bypass __Host and __Secure cookie prefixes

https://portswigger.net/research/cookie-chaos-how-to-bypass-host-and-secure-cookie-prefixes
1•one33seven•6m ago•0 comments

Cro – elegant reactive services in Raku

https://cro.raku.org/
1•giancarlostoro•7m ago•0 comments

Hiding Information Inside Images

https://nullonerror.org/2026/02/13/hiding-information-inside-images/
1•delduca•8m ago•0 comments

Firedome

https://www.fire-dome.com/
2•speckx•12m ago•0 comments

OpenQ4 0.9.0: open-source reimplementation of Quake 4

https://github.com/themuffinator/openQ4/releases/tag/v0.9.0
1•klaussilveira•12m ago•0 comments

Better to Beg Forgiveness

https://pluralistic.net/2026/07/31/just-do-it/
2•hn_acker•12m ago•0 comments

Smallpox reached the Americas: first genomic evidence points to Europeans

https://www.nature.com/articles/d41586-026-02366-y
1•Brajeshwar•13m ago•0 comments

IBM Claims Quantum Advantage with New Validation Techniques

https://spectrum.ieee.org/ibm-verifiable-quantum-advantage
1•nateb2022•13m ago•0 comments

Oceanographers Find Lessons in the Great Nike Shoe Spill (1992)

https://archive.seattletimes.com/archive/19921122/1526004/oceanographers-find-lessons-in-the-grea...
1•EndXA•13m ago•0 comments

Show HN: AI Photo Editor No Sign Up – Edit Photos with Prompts

https://aiphotoeditornosignup.online/
1•chenliang001•15m ago•0 comments

Show HN: Emacs user are you waiting for mg to get UTF-8?

https://github.com/nicholascarroll/emil
1•emil_coder•15m ago•0 comments

Stealthy Concurrent Audio Prompt Injections Against Multimodal LLM Agents

https://arxiv.org/abs/2607.28165
2•zhinit•15m ago•0 comments

U.S. debt-to-GDP ratio reaches 123%

https://fred.stlouisfed.org/series/GFDEGDQ188S
3•johnbarron•16m ago•0 comments

Show HN: Yet Another Markup Language Engineering Toolkit

https://github.com/RicardoMonteiroSimoes/Yamlet
1•RicDan•16m ago•0 comments

The Sylvester–Gallai Theorem

https://www.futilitycloset.com/2026/07/26/the-sylvester-gallai-theorem/
1•surprisetalk•17m ago•0 comments

How to Generate a TLSA Record and Fix the 3 1 1 Mismatch

https://dmarcguard.io/blog/tlsa-record-setup/
1•meysamazad•17m ago•0 comments

Go 1.27 Interactive Tour

https://victoriametrics.com/blog/go-1-27/index.html
1•olexsmir•17m ago•0 comments

A work journal to stay organised and informed

https://silviamaggidesign.com/blog/a-work-journal/
2•meysamazad•17m ago•0 comments

Why is it all in the kernel?

https://lawrencecpaulson.github.io//2026/07/30/Collatz.html
1•ibobev•18m ago•0 comments

Fixing a super 8 projector from the 70s

https://nibblestew.blogspot.com/2026/07/fixing-super-8-projector-from-70s.html
1•ibobev•18m ago•0 comments

Building a Reusable Alpine LXC Template on Proxmox

https://fmartingr.com/blog/2026/07/22/building-a-reusable-alpine-lxc-template-on-proxmox/
1•meysamazad•19m ago•0 comments

Veterans' PTSD resolves with psychedelic therapy in small US study

https://www.reuters.com/business/healthcare-pharmaceuticals/veterans-ptsd-resolves-with-psychedel...
1•giuliomagnifico•19m ago•0 comments

Arch Linux disables AUR package adoption

https://lwn.net/Articles/1086489/
1•database64128•20m ago•0 comments