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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•10mo 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!

Unified Modules for Your Nixfiles

https://jadarma.github.io/blog/posts/2026/03/unified-modules-for-your-nixfiles/
1•tymscar•1m ago•0 comments

I launched an open-source tool that turns any learning material into viral games

https://github.com/yh2072/edgameclaw
1•yh2072•1m ago•0 comments

Star Wars Username and Gamertag Ideas – Discord, Xbox, PS5 and Social Media

https://starwarsnamegenerator.com/blog/star-wars-username-generator-guide
1•Jaxon_Varr•3m ago•0 comments

MHServerEmu 1.0.0 Is Here

https://crypto137.github.io/MHServerEmu/blog/2026/03/20/mhserveremu-1-0-0.html
1•keithoffer•3m ago•0 comments

Things That Turbo Pascal Is Smaller Than (2011)

https://prog21.dadgum.com/116.html
1•signa11•4m ago•0 comments

3M's PFAS exit killed the supply chain for two-phase immersion cooling in DCs

https://thecoolingreport.com/intel.html
1•jackdilusso•8m ago•0 comments

Amazon plans smartphone comeback more than a decade after Fire Phone flop

https://www.reuters.com/technology/amazon-plans-smartphone-comeback-more-than-decade-after-fire-p...
3•mfiguiere•9m ago•0 comments

We will not accept money to influence the answers we give you

https://xcancel.com/svpino/status/2012282586890989719
1•acqbu•12m ago•0 comments

Planets most likely to host alien life, according to astronomers

https://www.popsci.com/science/habitable-planets-astronomers-project-hail-mary/
1•Brajeshwar•13m ago•0 comments

The Feed Framed the Last Election and AI Answers Will Frame the Next

https://matthodges.com/posts/2026-03-20-democrats-answer-layer/
1•m-hodges•14m ago•0 comments

Cybersecurity Skills for AI Agents (agentskills.io standard)

https://github.com/mukul975/Anthropic-Cybersecurity-Skills
1•mukul975•14m ago•0 comments

SwarmHawk – open-source CLI → Nuclei → AI synthesis → PDF report

https://github.com/hastikdan/swarmhawk-cli
2•hastikdan•19m ago•0 comments

Single-celled organism with no brain is capable of Pavlovian learning

https://www.newscientist.com/article/2519284-single-celled-organism-with-no-brain-is-capable-of-p...
2•XzetaU8•22m ago•1 comments

Judge Rules Apple Watch Blood Oxygen Workaround Does Not Infringe Masimo Patents

https://www.macrumors.com/2026/03/19/itc-apple-watch-workaround-valid/
1•mgh2•25m ago•0 comments

Codex with a vague prompt just solved a bug in Ghostty

https://twitter.com/mitchellh/status/2029348087538565612
2•Tikrong•26m ago•0 comments

Tesla Has Its First Semi-Truck and It's a Hit with Truckers

https://www.wsj.com/business/logistics/truckers-tesla-fans-semi-b0a66e6e
1•EwanG•29m ago•1 comments

Crossbar's new security chip isn't secure

https://www.zach.be/p/crossbars-new-security-chip-isnt
2•hasheddan•31m ago•0 comments

Starmer's digital ID reboot raises same old questions as its Blair-era ancestor

https://www.theregister.com/2026/03/20/digital_id_consultation/
1•jjgreen•31m ago•0 comments

The Coming SpaceX Scam

https://danafblankenhorn.substack.com/p/the-coming-spacex-scam
2•simonebrunozzi•32m ago•1 comments

Why modern physics is forcing us to rethink existence

https://bigthink.com/series/full-interview/michelle-thaller-spacetime/
1•Brajeshwar•32m ago•0 comments

Bernie Sanders: I spoke to AI agent Claude [video]

https://www.youtube.com/watch?v=h3AtWdeu_G0
1•epaga•33m ago•0 comments

SQLAlchemy 2 In Practice

https://blog.miguelgrinberg.com/post/sqlalchemy-2-in-practice---chapter-1---database-setup
2•ibobev•35m ago•0 comments

Ask HN: Should AI agents be allowed to spend money autonomously?

1•bahaghazghazi•36m ago•1 comments

Deepfake Impersonation Attacks (Part 1): Anatomy of Modern Deepfakes

https://www.slashid.com/blog/deepfake-impersonation-attacks-part-1/
1•snagg•36m ago•0 comments

Show HN: Htmx Toolkit for VS Code with completions, validation and 20 support

https://github.com/andreahlert/htmx-vscode-toolkit
3•andreahlert•39m ago•0 comments

Probing gravity with gravitational waves: cosmology, black hole ringdowns[video]

https://www.youtube.com/watch?v=tBL1Qwqhqfg
1•HappyPanacea•42m ago•0 comments

Session private messenger donation appeal

https://session.foundation/blog/a-personal-appeal-from-cofounder-of-session-chris-mccabe
1•yougotwill•45m ago•1 comments

Show HN: Aurea, an image codec that sequences pixels like DNA

https://github.com/5ymph0en1x/Aurea
1•Symphoenix•45m ago•0 comments

Getting Ziggy with It – Re: Factor

https://re.factorcode.org/2026/03/getting-ziggy-with-it.html
2•birdculture•46m ago•0 comments

Yog-Fsharp – A Graph Library for F#. A Port of Gleam's Yog

https://github.com/code-shoily/yog-fsharp
1•TheWiggles•47m ago•0 comments