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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•9mo 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!

Possible identification of the Luna 9 Moon landing site

https://www.nature.com/articles/s44453-025-00020-x
1•geox•1m ago•0 comments

We allowed remote code execution (but safely)

https://tumuchdata.club/post/coding-challenge-infrastructure/
1•todsacerdoti•1m ago•0 comments

Sovereign Code from the Heart of Suffering: Injecting Logic into AI

Https://paragraph.com/@0x4fd3729a4fedf54a74b73d93f7f775a1ef520cec/sovereign-logic-injection-how-t...
1•suffering•1m ago•1 comments

Resurrected nitrogenases recapitulate N-isotope biosignatures over 2B years

https://pmc.ncbi.nlm.nih.gov/articles/PMC9755046/
1•PaulHoule•1m ago•0 comments

Where will China get its compute in 2026?

https://www.the-substrate.net/p/where-will-china-get-its-compute
1•erwald•1m ago•0 comments

Show HN: Superposition, open source access to Claude Code or Codex from anywhere

https://github.com/trezm/superposition
1•trezm•2m ago•0 comments

The EU moves to kill infinite scrolling

https://www.politico.eu/article/tiktok-meta-facebook-instagram-brussels-kill-infinite-scrolling/
2•danso•3m ago•0 comments

No Here on Slack

https://noathere.org/
1•jcmuller•5m ago•0 comments

Humans as Constancy Anchors: A Response to 'Something Big Is Happening'

2•mrev2•7m ago•0 comments

Show HN: ARA-Engine – Modeling the Alberta power grid transition in Python

https://github.com/ada33934/ARA-Engine
1•ada33934•7m ago•0 comments

The AI hater's guide to code with LLMs

https://aredridel.dinhe.net/2026/02/12/the-ai-haters-guide-to-code-with-llms/
2•speckx•10m ago•0 comments

Show HN: An MCP server that gives AI assistants a live Mermaid diagram canvas

https://github.com/iishyfishyy/mermaid-live-mcp
1•ishyfishyy•10m ago•0 comments

Ask HN: Are there examples of 3D printing data onto physical surfaces?

1•catapart•11m ago•0 comments

Fair Weather

https://fair-weather.query-farm.services
2•rustyconover•12m ago•1 comments

OpenAI GPT-5.3-Codex-Spark Now Running at 1K Tokens per Second on Cerebras Chips

https://www.servethehome.com/openai-gpt-5-3-codex-spark-now-running-at-1k-tokens-per-secondon-big...
1•rbanffy•13m ago•0 comments

Mars and Life

https://twitter.com/nasamars/status/2022001374154854471
1•paulpauper•14m ago•0 comments

Oracle vs. PostgreSQL – Row level and Column level security

https://hexacluster.ai/blog/row-level-and-column-level-security-oracle-vs-postgresql
1•avivallssa•14m ago•0 comments

Apple faces new tensions with Trump administration

https://www.ft.com/content/0c25de53-4668-4ddf-9e28-f8c4fc34940e
2•ksec•14m ago•1 comments

Japan's National Chip Startup Races to 2nm Mass Production

https://www.ai-supremacy.com/p/japans-national-chip-startup-races-2nm-rapidus
1•rbanffy•14m ago•0 comments

Show HN: Moatifi – Free Buffett-style moat analysis for stocks

https://moatifi.com
1•lldougl•15m ago•1 comments

What Happened with Bio Anchors?

https://www.astralcodexten.com/p/what-happened-with-bio-anchors
2•paulpauper•15m ago•0 comments

Strawmen and Worldview Solipsism

https://cognitivewonderland.substack.com/p/strawmen-and-worldview-solipsism
1•paulpauper•15m ago•0 comments

Generalized On-Policy Distillation with Reward Extrapolation

https://arxiv.org/abs/2602.12125
1•fzliu•17m ago•0 comments

NIMBYs Complained About Me to the State Bar. The State Bar Told Them to Get Lost

https://inpractice.yimbyaction.org/p/nimbys-complained-about-me-to-the
1•luckyducky99•17m ago•0 comments

Commerzbank Joins European Payment App Wero

https://www.marketscreener.com/news/commerzbank-joins-european-payment-app-wero-ce7e5adddd8bff21
1•toomuchtodo•19m ago•1 comments

Show HN: Tide Commander – Visual Agents Orchestrator for Claude Code and Codex

https://github.com/deivid11/tide-commander
1•deivid11•20m ago•0 comments

Molly Guard in Reverse

https://unsung.aresluna.org/molly-guard-in-reverse/
1•CharlesW•20m ago•0 comments

Virginia court allows Democrats' redistricting vote in plan to counter to Trump

https://www.npr.org/2026/02/13/nx-s1-5711630/virginia-court-allows-democrats-redistricting-vote-i...
1•rbanffy•21m ago•0 comments

I built Fluxer, a Discord-like chat app

https://blog.fluxer.app/how-i-built-fluxer-a-discord-like-chat-app/
2•birdculture•22m ago•0 comments

I don't know what a function is. But I built a production SaaS anyway

https://articlefoundry.com
1•adambuildstuff•22m ago•2 comments