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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•11mo 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!

Twometer/NoFences: open-source Stardock Fences alternative

https://github.com/Twometer/NoFences
1•ankitg12•1m ago•0 comments

Tesla's cabin camera estimates driver age in latest software update

https://driveteslacanada.ca/news/teslas-cabin-camera-estimates-driver-age-in-latest-software-upda...
1•voisin•3m ago•0 comments

Creating new knobs of control in biology

https://www.owlposting.com/p/on-creating-new-knobs-of-control
1•yorwba•9m ago•0 comments

Mythos Is Everyone's Problem

https://www.theatlantic.com/technology/2026/04/claude-mythos-hacking/686746/
1•urbandw311er•9m ago•0 comments

You Do Need to Understand Mythos (YouTube Video)

https://www.youtube.com/watch?v=V6pgZKVcKpw
1•vaylian•14m ago•0 comments

Doctor behind vaccine-autism link loses license (2010)

https://healthland.time.com/2010/05/24/doctor-behind-vaccine-autism-link-loses-license/
1•downbad_•15m ago•0 comments

How to Build a Secure AI PR Reviewer with Claude, GitHub Actions, and JavaScript

https://www.freecodecamp.org/news/how-to-build-a-secure-ai-pr-reviewer-with-claude-github-actions...
1•mc-serious•20m ago•0 comments

Training for a Marathon with an AI Coach: What Worked and What Didn't

https://www.bloomberg.com/news/features/2026-04-10/training-for-a-marathon-with-an-ai-coach-what-...
1•helsinkiandrew•24m ago•0 comments

Protecting Copyright with AI

https://www.thomas-huehn.com/protecting-copyright-with-ai/
1•Tomte•28m ago•0 comments

BlueHammer abuses Windows Defender's update process to gain SYSTEM access

https://hackingpassion.com/bluehammer-windows-defender-zero-day/
3•BullsEye0•32m ago•1 comments

Show HN: Cyber Pulse. AI pipeline for triage and alerting on cyber news/Intel

https://play.google.com/store/apps/details?id=com.cyberpulse.cyber_pulse&hl=en_US
1•kozi93•32m ago•0 comments

Strait of Hormuz: A Citrini Field Trip (Free)

https://www.citriniresearch.com/p/free-strait-of-hormuz-a-citrini-field
2•jger15•35m ago•0 comments

I Built an AI PR Reviewer That Catches Bugs by Not Looking for Bugs

https://tessl.io/blog/i-built-an-ai-pr-reviewer-that-catches-bugs-by-not-looking-for-bugs/
1•rohansrma•37m ago•0 comments

Air Powered Segment Display? [video]

https://www.youtube.com/watch?v=E1BLGpE5zH0
1•ProfDreamer•37m ago•0 comments

Aisbf (AI Should Be Free) proxy 0.99.18 released

https://pypi.org/project/aisbf/
1•nextime•37m ago•1 comments

A tool to extract network sessions as an Image

https://github.com/q-viper/session-feature-extractor
1•isneck•41m ago•0 comments

Claude Code doesn't trust Claude with permissions

https://blog.raed.dev/posts/claude_code_permissions/
2•Raed667•42m ago•0 comments

Epos: A browser extension for building browser extensions

https://epos.dev
1•imkost•44m ago•0 comments

Let's Talk about LLMs

https://www.b-list.org/weblog/2026/apr/09/llms/
2•lumpa•46m ago•0 comments

Write less code, be more responsible

https://blog.orhun.dev/code-responsibly/
1•orhunp_•48m ago•0 comments

Gen Z workers who fear AI will take their job actively sabotaging its rollout

https://fortune.com/2026/04/08/gen-z-workers-sabotage-ai-rollout-backlash/
7•9woc•59m ago•1 comments

Tabularis: A lightweight, cross-platform database client. Hackable with pkugins

https://github.com/debba/tabularis
1•thunderbong•1h ago•0 comments

Flowyble Studio – Run Claude, Copilot and Codex Side-by-Side

https://flowyble.com/studio
2•schizi•1h ago•0 comments

The Munro Lecture with Adam Tooze – April 8 2026 [video]

https://www.youtube.com/watch?v=Th1pZfKi4SI
3•hackandthink•1h ago•0 comments

Energy-Based Models Is All You Need

https://www.youtube.com/watch?v=h9Gkchqr__M
1•frag•1h ago•0 comments

The Infinity Man: Demis Hassabis, Colleagues and Rivals

https://thechipletter.substack.com/p/the-infinity-man
1•klelatti•1h ago•0 comments

Mark's Magic Multiply

https://wren.wtf/shower-thoughts/marks-magic-multiply/
2•luu•1h ago•0 comments

Give Your Agent a Canvas, Not Just a Chatbox

https://create0.ai
2•enha•1h ago•1 comments

The Great GPU Shortage: H100 Rental Prices Up 40%

https://newsletter.semianalysis.com/p/the-great-gpu-shortage-rental-capacity
2•alecco•1h ago•0 comments

Due Diligence Framework Before Your Business Commits to Open Source

https://groundblue.gumroad.com/l/nlzhlx
1•elsadek•1h ago•0 comments