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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!

How to Disable Firefox's New Emoji Picker

https://emsh.cat/en/how-to-disable-firefoxs-emoji-picker/
1•embedding-shape•5m ago•0 comments

The Difference Between "Replicable" and "Not Replicable" Is Not Replicable

https://arxiv.org/abs/2604.26268
3•sebg•6m ago•0 comments

The A.I. Fear Keeping Silicon Valley Up at Night

https://www.nytimes.com/2026/04/30/opinion/ai-labor-work-force-silicon-valley.html
2•pretext•7m ago•0 comments

Collio Is the AI Coworker That Delivers Finished Work, Not Just Instructions

https://collio.chat/
1•serin-ai•8m ago•1 comments

Make HN great again: Neovim vs. IDEs

2•vtemian•14m ago•2 comments

Near-100% test coverage did not catch a CVE in my Go library

https://blog.reqproof.com/p/i-had-near-100-test-coverage-it-didnt
1•LeonidBugaev•19m ago•0 comments

Show HN: Throwaway – open-source disposable email checker and API

https://github.com/sslboard/throwaway
1•weddpros•20m ago•0 comments

Semantic VCS for AI driven development

https://github.com/theswiftway/nool-cli
1•theswiftway•21m ago•1 comments

Granite 4.1: IBM's 8B Model Matching 32B MoE

https://firethering.com/granite-4-1-ibm-open-source-model-family/
12•steveharing1•23m ago•2 comments

What Code Review Can't See (and Bad Data Always Finds)

https://blog.dochia.dev/blog/code_review_rarely_find_bugs/
2•ludovicianul•25m ago•0 comments

Australia ran the experiment on AI economics

https://drdavidwbell.substack.com/p/where-the-jobs-go
2•drdavidwbell•30m ago•0 comments

Cart before horse: On India and vehicle-to-vehicle communication technology

https://www.thehindu.com/opinion/editorial/cart-before-horse-on-india-and-vehicle-to-vehicle-comm...
1•thisislife2•30m ago•0 comments

Detection toolkit for CopyFail(CVE-2026-31431)

https://github.com/kadir/copy-fail-CVE-2026-31431-IOC
1•nofool•30m ago•1 comments

PostgreSQL Is Not Slow. Your Queries Are

https://stormatics.tech/blogs/postgresql-is-not-slow-your-queries-are
7•dbaxame11•33m ago•0 comments

Show HN: Mnheme Evolves – Personality and Free Will Enter the System

https://medium.com/@aatel.license/mnheme-evolves-personality-and-free-will-enter-the-system-66258...
1•aatel-license•37m ago•0 comments

Rise of the Blood Populist

https://www.theatlantic.com/ideas/2026/04/blood-populists-political-violence-ideology/686995/
1•JumpCrisscross•38m ago•0 comments

TypeScript framework for building non-blocking AI agents

https://github.com/jigjoy-ai/mozaik
1•mijura•38m ago•0 comments

Stop letting AI generate broken SVG spaghetti

https://github.com/stellarshenson/claude-code-plugins
2•stellars•38m ago•0 comments

No action taken against PimEyes: noyb lawsuit against Hamburg DPA

https://noyb.eu/en/no-action-taken-against-pimeyes-noyb-lawsuit-against-hamburg-dpa
3•hacka22•41m ago•0 comments

Show HN: I built a zero-tracking news hub to escape doomscrolling at (AGE 17y)

3•blazeeofsun•44m ago•0 comments

How Much LLMs is too much LLMs?

https://www.sammystraus.com/#how-much-llms-is-too-much-llms
4•sammy0910•51m ago•1 comments

Response: Sandboxes Won't Save You from OpenClaw

https://endojs.org/review-sandboxes-wont-save-you-from-openclaw/
2•bobdcf•52m ago•0 comments

Oil markets are still in La-La land

https://economist.com/leaders/2026/04/30/oil-markets-are-still-in-la-la-land
1•burntcaramel•54m ago•0 comments

Basic Fantasy Role-Playing Game

https://www.basicfantasy.org/
3•debo_•56m ago•1 comments

How much "Brain Damage" can an LLM Tolerate? (2024)

https://hawaii.ziti.uni-heidelberg.de/blog/llm-brain-damage/
1•Andr2Andr•57m ago•0 comments

Using LLMs to find Python C-extension bugs

https://lwn.net/Articles/1067234/
1•lumpa•57m ago•0 comments

You can beat the binary search

https://lemire.me/blog/2026/04/27/you-can-beat-the-binary-search/
6•signa11•58m ago•1 comments

White House Opposes Anthropic's Plan to Expand Access to Mythos Model

https://www.wsj.com/tech/ai/white-house-opposes-anthropics-plan-to-expand-access-to-mythos-model-...
2•JumpCrisscross•59m ago•0 comments

Schooling Has a Meaning Crisis. Paradoxically, AI Can Help

https://blog.comini.in/p/schooling-has-a-meaning-crisis-paradoxically
1•ChaitanyaSai•1h ago•0 comments

Met Police's Palantir deployment has its own officers watching their backs

https://www.theregister.com/2026/04/30/met_police_palantir_deployment_cop_probe/
2•jjgreen•1h ago•0 comments