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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!

Is Another Financial Crisis Lurking in Private Credit?

https://www.wsj.com/economy/is-another-financial-crisis-lurking-in-private-credit-cad379b1
1•JumpCrisscross•34s ago•0 comments

Adventures in Cellular Location Services

https://nickvsnetworking.com/somebodys-watching-me-adventures-in-cellular-locating/
1•birdculture•4m ago•0 comments

Infrastructure Has an Entropy Problem

https://www.planetform.io/blog/infrastructure-entropy-problem
1•rtwo_infra•7m ago•0 comments

Reason – break screen addiction using AI

https://reason-app.com/
1•yeetosaurusrex•10m ago•1 comments

A Guide to vim.pack (Neovim built-in plugin manager)

https://echasnovski.com/blog/2026-03-13-a-guide-to-vim-pack.html
1•whereistejas•15m ago•0 comments

Player Piano (Novel)

https://en.wikipedia.org/wiki/Player_Piano_(novel)
2•otras•18m ago•0 comments

Telecheck and Tyms Past

https://computer.rip/2026-03-29-telecheck-and-tyms-past.html
1•pinewurst•19m ago•0 comments

Autism study is my life's work. The spectrum has lost all meaning

https://www.thetimes.com/uk/healthcare/article/autism-is-my-lifes-work-the-spectrum-has-become-me...
1•davikr•23m ago•0 comments

Distressed-debt funds target priv credit downturn as 'best opportunity' since 08

https://www.ft.com/content/8c3514be-8c7b-4d13-a59a-dd8a23fb8c40
1•alephnerd•25m ago•0 comments

Israel suspends battalion assaulting, detaining CNN crew in West Bank

https://www.cnn.com/2026/03/29/middleeast/idf-suspends-battalion-assaulting-cnn-crew-in-west-bank...
3•mememememememo•28m ago•0 comments

The Corvette E-Ray Is Dead, but Grand Sport X Picks Up Where It Left Off

https://www.thedrive.com/news/the-corvette-e-ray-is-already-dead-but-the-grand-sport-x-picks-up-w...
1•PaulHoule•30m ago•0 comments

AI Tokens Are Mana

https://www.proofofconcept.pub/p/ai-tokens-are-mana
4•herbertl•30m ago•0 comments

The Macintosh changed computers forever

https://www.theverge.com/podcast/903068/macintosh-1984-version-history
2•tambourine_man•33m ago•0 comments

AI Changed Chess, Grandmasters Now Win with Unpredictable Moves

https://www.bloomberg.com/news/articles/2026-03-27/ai-changed-chess-grandmasters-now-win-with-unp...
3•Amorymeltzer•33m ago•0 comments

The Strait of Hormuz Oil Shock Is Now Heading West

https://www.bloomberg.com/graphics/2026-iran-war-hormuz-closure-oil-shock
4•petethomas•38m ago•7 comments

Effect: The missing standard library for TypeScript

https://effect.website/
1•modinfo•39m ago•0 comments

WM Bench: A Benchmark for Cognitive Intelligence in World Models

https://huggingface.co/blog/FINAL-Bench/world-model
1•seawolf2357•39m ago•0 comments

Why a 98-year-old federal judge is asking the Supreme Court for her job back

https://www.npr.org/2026/03/29/nx-s1-5752172/oldest-federal-judge-us-supreme-court
2•geox•42m ago•0 comments

Navigating AI: Critical Thinking in the Age of LLMs

https://mcuoneclipse.com/2025/12/31/navigating-ai-critical-thinking-in-the-age-of-llms/
1•vinhnx•44m ago•0 comments

AI Hot Takes from a Platform Engineer / SRE

https://alienchow.dev/post/ai_takeaways_mar_2026/
1•vinhnx•44m ago•0 comments

Bluesky leans into AI with Attie, an app for building custom feeds

https://techcrunch.com/2026/03/28/bluesky-leans-into-ai-with-attie-an-app-for-building-custom-feeds/
2•enos_feedler•45m ago•0 comments

Terminal UI for WireGuard and OpenVPN with real-time telemetry and leak guarding

https://github.com/Harry-kp/vortix
1•neiesc•50m ago•1 comments

AI agents can safely browse

https://pypi.org/project/safebrowse-client/
1•robaka•50m ago•0 comments

Bluesky's next product is an AI assistant that helps build social media feeds

https://www.engadget.com/ai/blueskys-next-product-is-an-ai-assistant-that-helps-build-custom-soci...
1•SanjayMehta•53m ago•0 comments

Bitter Lesson Engineering

https://danielmiessler.com/blog/bitter-lesson-engineering
2•vinhnx•54m ago•0 comments

US will reportedly allow Russian oil tanker to reach Cuba amid blockade

https://www.theguardian.com/us-news/2026/mar/29/us-russian-oil-tanker-cuba-blockade
1•MilnerRoute•57m ago•0 comments

I Saw Something New in San Francisco

https://www.nytimes.com/2026/03/29/opinion/ai-claude-chatgpt-gemini-mcluhan.html
2•zacharyozer•1h ago•0 comments

iPhone Mirroring is not available in the EU, so I built my own

https://twitter.com/alexintosh/status/2038317511054172208
1•alexintosh•1h ago•1 comments

I built a free offline productivity app

https://apps.apple.com/us/app/gluon-todo-project-planner/id6758938759
1•cothi•1h ago•0 comments

The Pirate Bay's Oldest Torrent Turned 22

https://torrentfreak.com/the-pirate-bays-oldest-torrent-turned-22/
2•nixass•1h ago•0 comments