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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!

Anthropic wants to develop its own drugs

https://www.theverge.com/ai-artificial-intelligence/961311/anthropic-claude-science-ai-drug-devel...
1•erhuve•4m ago•0 comments

Instagram running ads promoting child sexual abuse material in India, BBC finds

https://www.bbc.com/news/articles/cvgm4e0316zo
1•muralimadhu•6m ago•0 comments

Ask HN: Where are the good search engines for mathematical formulas?

1•lo0dot0•7m ago•0 comments

Apple Hide My Email Reveals the User’s Real Email

https://www.404media.co/apple-hide-my-email-vulnerability-reveals-peoples-real-email-addresses/
2•oldfuture•11m ago•1 comments

EU appears to find datacenter emissions easier to offset than lobbyists

https://www.theregister.com/on-prem/2026/07/03/eu-appears-to-find-datacenter-emissions-easier-to-...
2•Bender•14m ago•0 comments

What is a quantum computer good for? nothing – yet

https://www.theverge.com/science/959466/quantum-computer-majorana-2-microsoft-trump-eo
2•joak•14m ago•1 comments

Shaper3d is too expensive so I vibe coded this for Woodwork design

https://designer.vos.lol/
1•AndrewVos•18m ago•1 comments

Go-K8SDeploy – A <50MB RAM GitOps engine with tamper-evident audit logs

https://github.com/Your-Net-Tech/Go-K8SDeploy
1•ynetx•19m ago•0 comments

Open Syllabus: Galaxy

https://galaxy.opensyllabus.org/
1•mmooss•20m ago•0 comments

Overllm – flags where you're paying an LLM to do a regex's job

https://github.com/theadamdanielsson/overllm
1•adamdanielsson1•20m ago•1 comments

As downtown Seattle offices empty, city facing years of 'zombie' towers

https://www.seattletimes.com/business/local-business/as-downtown-seattle-offices-empty-city-facin...
11•petethomas•23m ago•1 comments

WeatherMaster, Open Source, and the Future of Android; Interview with Pranshul

https://gardinerbryant.com/weathermaster-open-source-and-the-future-of-android/
1•thunderbong•23m ago•0 comments

Funding Your Own Disruption

https://stratnotes.substack.com/p/funding-your-own-disruption
1•swastikanayak•30m ago•0 comments

ROZ Nanobots for Your PC

https://republicofzani.com/software
1•zani1337•30m ago•0 comments

Understanding AI Memory the Basics

https://kingofkimchi.substack.com/p/the-memory-files-case-01-ai-memory
1•KingofKimchi•34m ago•0 comments

HN – The first AI recruitment assistant beyond traditional ATS

https://www.kyntoai.com
1•Alex_Bonjean•37m ago•1 comments

Email inboxes for AI agents: the complete guide – MailKite

https://mailkite.dev/blog/email-inbox-for-ai-agents-guide/
1•fijiwebdesign•37m ago•0 comments

PicnicHabits Is Now Live

https://picnichabits.uk
1•PicnicApps•41m ago•0 comments

Fable 5 BeyBlade-inspired Arena Game

https://parastoner.itch.io/spintop-arena
1•Paratoner•44m ago•0 comments

Show HN: Cute Music App

1•bOZbfU4YdRnJQ•45m ago•0 comments

Ebrains Crowdsources the Future of European Neuroscience

https://www.the-scientist.com/ebrains-crowdsources-the-future-of-european-neuroscience-74690
1•visha1v•45m ago•1 comments

Algae Microrobots Battle Bladder Cancer

https://www.the-scientist.com/algae-microrobots-battle-bladder-cancer-74700
2•visha1v•47m ago•1 comments

Convert your RSS feeds into a static website

https://www.xda-developers.com/i-replaced-my-100-year-rss-reader-with-a-free-github-pages-aggrega...
2•8organicbits•48m ago•0 comments

Tests Are SQL Files Too

https://npgsqlrest.github.io/blog/npgsqlrest-3.19-sql-test-runner-watch-mode.html
1•vbilopav•56m ago•0 comments

Show HN: AI-powered code review tool

https://github.com/Kirill89/reviewcerberus
1•k1r111•58m ago•0 comments

EyesOff Spots Shoulder Surfers Using a Privacy-First Approach

https://www.eyesoff.app/blog/how-eyesoff-spots-shoulder-surfers/
1•Two_hands•1h ago•0 comments

But Nothing Has Changed on Our Side

https://cacm.acm.org/blogcacm/but-nothing-has-changed-on-our-side/
1•visha1v•1h ago•1 comments

I can build anything, but only the void sees it

3•urbanogt5•1h ago•4 comments

AI researchers ran a secret experiment on Reddit users (2025)

https://www.livescience.com/technology/artificial-intelligence/ai-researchers-ran-a-secret-experi...
1•rolph•1h ago•2 comments

Verizon is About to Break our Watches

https://www.jefftk.com/p/verizon-is-about-to-break-our-watches
33•jefftk•1h ago•7 comments