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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!

China Chipmaker CXMT Jumps 472% in Debut After Blockbuster IPO

https://www.bloomberg.com/news/articles/2026-07-26/china-memory-champion-cxmt-set-to-debut-after-...
1•magnio•47s ago•0 comments

Antares: Highly Efficient Open Weight AI Models for Vulnerability Localization

https://blogs.cisco.com/ai/introducing-antares-the-most-efficient-open-weight-ai-models-for-vulne...
1•chillax•2m ago•0 comments

SecretSpec 0.17: Scopes, secrets caching, SOPS, age, and systemd credentials

https://secretspec.dev/blog/secretspec-0-17-scopes-secrets-caching-age-and-systemd-credentials/
1•domenkozar•8m ago•0 comments

Open dataset of i2c addresses and voltages for 50 common boards

https://github.com/i2c-net/i2c-address-dataset
1•chzburgrz•14m ago•0 comments

TIRx: An Open Compiler Stack for Evolving Frontier ML Kernels

https://tvm.apache.org/2026/06/22/tirx
2•EvgeniyZh•22m ago•0 comments

3D Printed Nuclear Reactor

https://www.youtube.com/watch?v=gwRWRDrfrvA
1•flitzofolov•26m ago•1 comments

Tell HN: Leaving your country is your only real leverage

4•julienreszka•28m ago•5 comments

Show HN: Spur solver – Z3-backed model-finder solved values for coding agent

https://github.com/getspur/spur/tree/main/crates/spur-solver
1•mf_kevintruong•28m ago•0 comments

Basilisk: Fast 100% PEP compliant Python type checker

https://www.basilisk-python.dev/
1•theusus•28m ago•0 comments

Psion Emulator – classic Psion palmtops in your browser

https://joehaines.com/psion/
1•randkyp•37m ago•0 comments

The most official water costs $120k a gallon

https://signoregalilei.com/2026/07/26/the-most-official-water-costs-120000-a-gallon/
3•srijan4•40m ago•0 comments

AI Workspace for Your PC

https://stuard.ai
1•Ifesol•44m ago•1 comments

Verisign Cooperative Agreement

https://www.ntia.gov/program/verisign-cooperative-agreement
4•themaxdavitt•45m ago•0 comments

Nvidia in Talks with OpenAI to Guarantee $250B Financing for Data Center

https://www.wsj.com/tech/ai/nvidia-in-talks-with-openai-to-guarantee-250-billion-financing-for-da...
5•taurath•53m ago•1 comments

Show HN: 3D music visualization on Apple Vision Pro

https://old.reddit.com/r/VisionPro/comments/1v5llv9/3d_music_visualization_on_apple_vision_pro/
1•linxy97•53m ago•0 comments

Show HN: Watch random code typed out on an MS-DOS IDE

https://hackerman.specr.net/
2•vunderba•57m ago•0 comments

Sand battery: Finland's answer to a renewable energy headache

https://www.cnbc.com/2026/07/25/finland-sand-battery-renewable-energy-storage.html
5•coderintherye•58m ago•0 comments

Why AI Doesn't Replace Software Architecture – It Makes It More Valuable

https://wilburhimself.github.io/blog/65-why-ai-doesnt-replace-software-architecture/
1•wilburhimself•59m ago•1 comments

Malicious sites use JavaScript to build malware in browser memory

https://www.bleepingcomputer.com/news/security/malicious-sites-use-javascript-to-build-malware-in...
3•justworks•59m ago•1 comments

Show HN: CarbonSheets – Host your own customizable cheatsheet portal In GitHub

https://carbonsheets.vercel.app/
2•elnoxvie•1h ago•0 comments

Physicists build a computer from 400 particles orbiting in liquid

https://www.tomshardware.com/tech-industry/physicists-build-a-computer-from-400-particles-orbitin...
2•sbulaev•1h ago•0 comments

Sticky notes on a storyboard became my savior productivity app

https://www.taskloco.com/
1•taskloco_nyc•1h ago•0 comments

The Optimization Theory of Everything

https://12gramsofcarbon.com/p/the-optimization-theory-of-everything
1•theahura•1h ago•1 comments

Show HN: Quintile – keyboard-only window grids for Mac

https://github.com/stefanopineda/quintile
1•stefanopineda•1h ago•0 comments

Foxconn drops VMware, adopts hyperconverged upstart Arcrfra

https://www.theregister.com/virtualization/2026/07/27/foxconn-drops-vmware-adopts-hyperconverged-...
2•NordStreamYacht•1h ago•0 comments

Show HN: ASL V6 – Open-source AST red-teaming engine for Python AI agents

https://github.com/sivaadityacoder/asl-v6
2•sivaaditya•1h ago•0 comments

Show HN: Injectable time and timers with custom Date types for TypeScript

https://github.com/jaenyf/time-provider
1•jaenyf•1h ago•0 comments

Multimodal foundation model for image and video understanding from Microsoft

https://huggingface.co/microsoft/Mage-VL
1•MehrdadKhnzd•1h ago•0 comments

Bullwhip Effect

https://en.wikipedia.org/wiki/Bullwhip_effect
4•vismit2000•1h ago•0 comments

It is empowering to hand off execution

https://www.charbzg.com/blog/ai-empowerment
1•charbz•1h ago•1 comments