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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!

Making the Invisible Visible

https://biohub.org/blog/laser-phase-plate-cryo-em-making-invisible-visible/
1•selimonder•59s ago•0 comments

Ask HN: What do you think about US Government's Geographic Ban on Fable?

1•akashwadhwani35•2m ago•0 comments

How a Linguist Helped Me Understand C

https://jjrgn.substack.com/p/how-a-linguist-helped-me-understand
1•3rly•11m ago•0 comments

Animation Vocabulary

https://animations.dev/vocabulary
2•vinhnx•14m ago•0 comments

El Niño and the Iran war may spark hunger crisis for more than 100M

https://www.washingtonpost.com/climate-environment/2026/06/12/why-iran-war-powerful-el-nio-could-...
2•MilnerRoute•17m ago•0 comments

Dave Eggers doesn't need a smartphone, the internet or your Flock camera

https://www.sfgate.com/sf-culture/article/dave-eggers-profile-22291491.php
3•mikhael•18m ago•0 comments

Fable 5 is gone from model lists

https://www.anthropic.com
2•Robelk1•20m ago•1 comments

Show HN: LLMRender, a 10kb Markdown+LaTeX renderer for React

https://llmrender.com/
2•franciscop•25m ago•0 comments

Sam Bankman-Fried loses fraud conviction appeal

https://www.ft.com/content/adbf76dc-c476-4f8f-9a6e-3bea0a5c24a6
2•petethomas•30m ago•0 comments

How flat is replacing fat in AWS data center networks

https://www.amazon.science/blog/how-flat-is-replacing-fat-in-aws-data-center-networks
1•porjo•32m ago•0 comments

Our response to the US ban on Fable 5 and Mythos 5

https://isaacus.com/blog/our-response-to-the-us-ban-on-fable-5-and-mythos-5
1•ubutler•37m ago•0 comments

ProofLayer Rules – runtime security, red-team evals for LangGraph

https://github.com/sinewaveai/prooflayer-rules
1•dchitimalla1•41m ago•0 comments

HAFT: Higher-Order Abstractions for Rust

https://www.deepcausality.com/blog/announcement-haft-hkt/
1•marvin-hansen•46m ago•0 comments

Qatar pursued secret talks with Iran to shield gas complex from strikes

https://www.washingtonpost.com/world/2026/06/12/qatar-pursued-secret-talks-with-iran-shield-gas-c...
2•pinewurst•49m ago•0 comments

Show HN: The A-C Coupling Theorem – Solving Diophantine Systems in O(1)

https://zenodo.org/records/20648657
4•A19dammer91•53m ago•0 comments

Notion Is Migrating to SwiftUI, Apple Confirms at WWDC

https://www.macrumors.com/2026/06/12/notion-is-migrating-to-swiftui/
1•peterspath•53m ago•0 comments

Fable 5 Released and Suddenly I'm Much More Paranoid About My VSCode Extensions

https://medium.com/@ishaan_agrawal/fable-5-dropped-and-im-suddenly-a-lot-more-paranoid-about-my-v...
3•shadow-ninja•53m ago•0 comments

The MilkV Jupiter 2/SpacemiT K3

https://taoofmac.com/space/reviews/2026/06/11/1830
1•zdw•54m ago•0 comments

Palantir loses lawsuit disputing story of how Swiss govt rejected its services

https://www.theguardian.com/technology/2026/jun/13/palantir-loses-legal-challenge-to-force-swiss-...
4•Geekette•1h ago•0 comments

Show HN: DNSweep – DNS lookup with ASN, anycast, and CDN/WAF detection

https://dnsweep.com
1•layer7_ethan•1h ago•0 comments

A Lean 4-verified Balansis lib to eliminate NaN and make zero-division safe

https://github.com/XTeam-Pro/Balansis
2•AndrewHakmi•1h ago•0 comments

Charlie Dalin, Who Set a Sailing Record While Battling Cancer, Dies at 42

https://www.nytimes.com/2026/06/12/sports/sailing/charlie-dalin-dead.html
2•iancmceachern•1h ago•0 comments

Gene Shalit, longtime 'Today' show movie critic, dies at 100

https://apnews.com/article/gene-shalit-dies-b8ed6f4b7054e530e5fba9a808902cca
2•petethomas•1h ago•0 comments

Elon Musk becomes first trillionaire

https://www.bbc.com/news/articles/c4gypy3wwl7o
4•tonyhart7•1h ago•1 comments

Text/Plain Blog

https://textplain.blog/
5•flykespice•1h ago•2 comments

OpenHands Index

https://index.openhands.dev/home
1•jmj•1h ago•0 comments

Let's call 'em "aigents"

https://www.autodidacts.io/aigents/
2•Curiositry•1h ago•0 comments

Dhtmlx Gantt – JavaScript Gantt Chart (Community Edition)

https://github.com/DHTMLX/gantt
1•thunderbong•1h ago•0 comments

CipherNode – An offline, self-correcting AI swarm compiled to a single .exe

1•CipherNode•1h ago•0 comments

China cracks down on Western AI models while US companies flock to DeepSeek

https://www.techradar.com/pro/the-great-ai-irony-china-cracks-down-on-western-models-while-us-com...
4•giuliomagnifico•1h ago•0 comments