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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!

Creating Games on Android

https://godotengine.org/article/gabe-stable-release/
1•__natty__•3m ago•0 comments

Publishers in UK can opt out of Google AI search results

https://www.bbc.co.uk/news/articles/c775pp26yz5o
1•todd-davies•6m ago•0 comments

Spidra

https://spidra.io
1•spidra•6m ago•1 comments

Microsoft forms partnership with Unsloth AI about local LLM execution

https://xcancel.com/UnslothAI/status/2061925637892297122
1•theanonymousone•9m ago•0 comments

Bending Light: How Optics Research Is Rewriting the Rules of Computing

https://www.allaboutcircuits.com/news/bending-light-how-optics-research-rewriting-rules-of-comput...
1•giuliomagnifico•10m ago•0 comments

Vim Classic 8.3 Released

https://vim-classic.org/news/vim-8.3-released.html
1•LaSombra•11m ago•0 comments

Azure HorizonDB: Enterprise-Ready Postgres, Engineered for the AI Era

https://techcommunity.microsoft.com/blog/adforpostgresql/azure-horizondb-enterprise-ready-postgre...
1•aamederen•14m ago•0 comments

SpaceX plans IPO price at $135 per share, targeting record $75B raise

https://www.reuters.com/business/media-telecom/spacex-plans-raise-75-billion-ipo-135-per-share-so...
1•JumpCrisscross•15m ago•0 comments

Homes.plus – Chrome extension overlaying investor metrics on Zillow

https://homes.plus/
2•ecuras•16m ago•1 comments

Revo, the Programming Language

https://gills.pages.dev/revo/
2•birdculture•17m ago•0 comments

GoPro Faces Bankruptcy

https://www.digitec.ch/captcha
2•teleforce•18m ago•0 comments

The Cloud vs. Edge Debate Is Over

https://marcobambini.substack.com/p/the-cloud-vs-edge-debate-is-over
2•marcobambini•18m ago•0 comments

Life and work is not meant to be spent in isolation

https://46elks.com/blog/2026/05/29/an-amazing-time-for-programmers
2•jlundberg•19m ago•0 comments

Block-Level CRDT: The Missing Piece for Collaborative AI Agent Memory

https://marcobambini.substack.com/p/block-level-lww-the-missing-piece
1•marcobambini•19m ago•0 comments

Casey Muratori's 'Wading Through AI' [video]

https://www.youtube.com/watch?v=bjO-s4rNPlY&list=PLEMXAbCVnmY6U_pA-7GKuP9xiv9utLaP4
3•xyzal•25m ago•0 comments

Microsoft CEO: We're moving from OS and apps to agents instead

https://9to5mac.com/2026/06/02/microsoft-ceo-were-moving-from-os-and-apps-to-agents-instead/
4•aragilar•26m ago•0 comments

Show HN: Who built this website? Check any domain

https://whosbuilt.com
2•hboon•27m ago•0 comments

StackPulse – One Command Kubernetes Observability Platform

https://github.com/shivamshashank/StackPulse
2•shashank-shivam•30m ago•1 comments

$10k bounty to break Pydantic's Python interpreter / sandbox

https://hackmonty.com/
2•weiliddat•32m ago•0 comments

MAI-Thinking-1: Building a Hill-Climbing Machine [pdf]

https://microsoft.ai/wp-content/uploads/2026/06/main_20260602_2.pdf
1•smaddrellmander•33m ago•0 comments

LLM_InSights

https://github.com/yuvhaim-gif/LLM_InSight
1•yuvalhaim•33m ago•1 comments

Apple M1 Chip Deep-Dive [video]

https://www.youtube.com/watch?v=mHEWMiHgyU8
1•mariuz•37m ago•0 comments

IdeaVibe – Anonymous idea voting, no signup required

https://ideavibe.netlify.app
1•fiker_sh•41m ago•0 comments

AeroSpace: An i3-like tiling window manager for macOS

https://github.com/nikitabobko/AeroSpace
1•thunderbong•41m ago•0 comments

Ensolabs/codimg: Transform your code blocks to SVG

https://github.com/ensolabs/codimg
1•cekrem•42m ago•0 comments

AI Engineers aren't safe from being replaced by AI

https://dmanco.dev/2025/08/17/fear-not-even-ai-engineers-will-be-replaced-by-ai.html
2•Doch88•52m ago•1 comments

Show HN: GymCoach – Self-hosted workout tracker where you bring your own LLM

https://github.com/Julien-Au/gymcoach
1•Julien-Au•52m ago•0 comments

Microrobots deliver stem cells for nerve regeneration

https://ethz.ch/en/news-and-events/eth-news/news/2026/06/microrobots-repair-spinal-cord.html
1•milmar55•55m ago•0 comments

Open Source alternative to Substack and Buttondown

https://github.com/scmmishra/picoletter
1•shivam-dev•55m ago•0 comments

Ask HN: What are good AI UIs now?

1•ramstar3000•56m ago•2 comments