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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!

Beaver: An Enterprise Benchmark for Text-to-SQL

https://peterbaile.github.io/beaver/
1•tcp_handshaker•39s ago•0 comments

Rx Inspector: Look Up Where Your Generic Prescription Drugs Were Made

https://projects.propublica.org/rx-inspector/
2•turtleyacht•5m ago•0 comments

The 48-Hour Cancer Binder

https://ludocomito.dev/blog/48-hour-cancer-binder/
2•ludocomito•7m ago•0 comments

Palace-AI – memory palace for AI agents

https://github.com/RhyChaw/palace-ai
2•RhythmC•9m ago•0 comments

A Note On Distributed Computing (1994)[pdf]

https://waldo.scholars.harvard.edu/sites/g/files/omnuum6261/files/waldo/files/waldo-94.pdf
2•ai_critic•19m ago•0 comments

The clean-up cost of AI code is what the velocity narrative leaves out

https://webflow.com/blog/cleanup-cost-ai-generated-code
4•dxs•19m ago•0 comments

Halt and Catch Fire

https://unstack.io/halt-and-catch-fire
3•ScottWRobinson•23m ago•0 comments

Tata Electronics and ASML Announce Strategic Partnership

https://www.asml.com/en/news/press-releases/2026/tata-electronics-and-asml-announce-strategic-par...
3•saharshpruthi•25m ago•1 comments

As Russian drones hunt Ukrainians in 'human Safari,' a boy fought back

https://www.washingtonpost.com/world/2026/05/15/russian-drones-hunt-ukrainians-human-safari-boy-f...
3•Stratoscope•25m ago•1 comments

Thousands todo apps, but none allows one-click collaboration with my grandma

https://medium.com/@tombarys/dotolist-creating-a-one-click-team-065a18dbeccd
3•tombarys•27m ago•1 comments

Elevated error rates on requests to multiple models

https://status.claude.com/incidents/v9s6d0jt84hj
9•recroad•27m ago•1 comments

Show HN: Daily vibe-coding video games, day 33: Tower Defense (single prompt)

https://gamevibe.us/33-tower-defense
3•pzxc•28m ago•0 comments

CC: Anthropic API Error: 500 Internal Server Error

https://github.com/anthropics/claude-code/issues/59743
5•brenoRibeiro706•30m ago•1 comments

Nvidia Preparing RTX 5090 Price Increase Due to Rising GDDR7 Memory Costs

https://mp1st.com/news/nvidia-preparing-rtx-5090-price-increase
3•jeffufl•30m ago•0 comments

Feeds: A Minimal RSS Aggregator and Client

https://stevedylan.dev/posts/feeds/
3•speckx•31m ago•0 comments

Malta gives citizens a paid version of ChatGPT Plus for free

https://ranked.news/malta-gives-citizens-a-paid-version-of-chatgpt-plus-for-free
2•doener•33m ago•0 comments

I 3D Printed Origami [video]

https://www.youtube.com/watch?v=FNVBK7-h9Fs
5•Teever•36m ago•1 comments

Haiku boots to desktop on an M1 MacBook Air

https://discuss.haiku-os.org/t/my-haiku-arm64-progress/19044?page=2
3•calgarymicro•38m ago•1 comments

Hermes-agentmemory: pull-model episodic memory with real deletes

https://github.com/MukundaKatta/hermes-agentmemory
2•mukundakatta•38m ago•0 comments

US Is Starting to See Heavy Job Losses in Roles Exposed to AI

https://www.bloomberg.com/news/articles/2026-05-15/us-is-starting-to-see-heavy-job-losses-in-role...
8•elsewhen•39m ago•0 comments

A brief guide to self-hosting websites and apps using Cloudflare Tunnel

https://blog.dougbelshaw.com/cloudflare-tunnel/
2•speckx•43m ago•0 comments

Rubin Tracks Skyscraper-Size Asteroids, Supernovas, and Interstellar Visitors

https://www.quantamagazine.org/rubin-tracks-skyscraper-size-asteroids-failed-supernovas-and-inter...
1•rbanffy•47m ago•0 comments

OpenIQ - Building a product engineering muscle in the age of agents

https://abhirame.github.io/posts/openiq/
2•abhis3798•52m ago•0 comments

Book Club: 100 best novels of all time

https://www.theguardian.com/books/ng-interactive/2026/may/12/the-100-best-novels-of-all-time
3•fallinditch•56m ago•1 comments

Cerebras IPO Signals Growing Pressure on the GPU Scaling Model

https://www.hpcwire.com/2026/05/14/cerebras-ipo-signals-growing-pressure-on-the-gpu-scaling-model/
5•rbanffy•56m ago•1 comments

A simple Daikon-style runtime invariant miner for Python

https://rahul.gopinath.org/post/2026/05/09/simple-invariant-miner/
1•fanf2•57m ago•0 comments

AI agents make small companies bigger

https://text-incubation.com/ai-agents-make-small-companies-bigger?1
1•krrishd•58m ago•0 comments

Clarify & target potential customers with generated sales campaigns

https://mygtm.io/
1•Bryan2000100•1h ago•1 comments

LSL: Open-source lab streaming layer for synchronized multimodal recording

https://direct.mit.edu/imag/article/doi/10.1162/IMAG.a.136/132678/The-lab-streaming-layer-for-syn...
1•teleforce•1h ago•1 comments

U.S. California 'Rich Dude' Fights $2.5M Fine over Public Beach Access

https://www.wsj.com/us-news/california-rich-dude-fights-2-5-million-fine-over-public-beach-access...
2•iancmceachern•1h ago•0 comments