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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•12mo 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!

Can Someone Please Explain Whether Cloudflare Blackmailed Canonical?

https://www.flyingpenguin.com/can-someone-please-explain-whether-cloudflare-blackmailed-canonical/
1•speckx•37s ago•0 comments

Run Claude Code for Free

https://www.tianjerry.com/blog/run-claude-code-for-free
1•t7y•2m ago•0 comments

Topics in High-Performance Messaging

https://ultramessaging.github.io/thpm/thpm.html
1•PaulHoule•3m ago•0 comments

The Emergent Self Loop

https://kevinkelly.substack.com/p/the-emergent-self-loop
1•jger15•3m ago•0 comments

Flipping the bozo bit on flips the learning off

https://surfingcomplexity.blog/2026/05/09/flipping-the-bozo-bit-on-flips-the-learning-off/
1•birdculture•4m ago•0 comments

EMO: Pretraining mixture of experts for emergent modularity

https://allenai.org/blog/emo
1•gmays•4m ago•0 comments

Show HN: YC Interview Simulator (Voice of Garry Tan)

https://yc.speko.ai
1•abdik•4m ago•0 comments

How I made a shooter game in 64 KB [video]

https://www.youtube.com/watch?v=qht68vFaa1M
1•msephton•4m ago•0 comments

Apple rolls out encrypted RCS messaging in beta

https://sixcolors.com/link/2026/05/apple-rolls-out-encrypted-rcs-messaging-in-beta/
1•Doches•4m ago•0 comments

Be careful with your Git: Investigating malware spreading through fake Git repos

https://andrii.ro/blog/investigating-malware
1•tsfc•5m ago•0 comments

Transform articles into LinkedIn and Twitter posts with AI

https://chromewebstore.google.com/detail/spark-content-engine/apemplcpiopjhfmmmaabajoblkbddkcn
1•chandanjha_dev•7m ago•0 comments

Unified Config Files

https://www.johndcook.com/blog/2026/05/06/unified-config-files/
1•ibobev•7m ago•0 comments

Operation Epic Furious (Trump-Inspired Game by the Secret Handshake)

https://www.epicfurious.com/
1•standardUser•7m ago•0 comments

Chief Executives to Accompany Trump to China

https://www.nytimes.com/2026/05/11/us/politics/trump-china-musk-cook.html
2•geox•7m ago•0 comments

Digg tries again, this time as an AI news aggregator

https://techcrunch.com/2026/05/11/digg-tries-again-this-time-as-an-ai-news-aggregator/
1•bookofjoe•7m ago•0 comments

Triangular Analog of the Squircle

https://www.johndcook.com/blog/2026/05/06/triangular-analog-of-the-squircle/
1•ibobev•7m ago•0 comments

Smoothed Polygons

https://www.johndcook.com/blog/2026/05/07/smoothed-polygons/
1•ibobev•7m ago•0 comments

Tahoe's UI Issues Have Nothing to Do with Display Technology

https://daringfireball.net/linked/2026/05/11/gurman-on-macos-27-ui-and-vision-roadmap
1•vitosartori•8m ago•0 comments

Show HN: Telegram bot that analyzes chess positions from images

https://telegram.chessvision.ai/
1•pkacprzak•9m ago•0 comments

Ask HN: Please share feeds to learn about Post Quantum Cryptography PQC

1•ajr0•9m ago•0 comments

Life Without US Tech

https://www.ft.com/content/4c3aad70-e0cb-46a2-95d5-15d11b6bf818
3•aanet•10m ago•1 comments

Show HN: SyncBank – Self-hosted bank sync for EU banks

https://syncbank.app/
1•samdsgn•11m ago•0 comments

Is Consciousness Just a Context Window?

https://randalltombaugh.substack.com/p/is-consciousness-just-a-context-window
2•filearts•11m ago•0 comments

Daybreak Frontier AI for cyber defenders

https://openai.com/daybreak/
1•crorella•11m ago•0 comments

As the Planet Warms, Why Is the Upper Atmosphere Cooling?

https://e360.yale.edu/digest/upper-atmosphere-cooling-study
1•speckx•12m ago•0 comments

Essay: Causal Usefulness Is Not Causal Identification

https://blog.noumenalai.com/causal-world-models-or-just-very-good-predictors/
1•boulevard•12m ago•0 comments

Anatomy of a Decent. Prediction Market: Microstructure Evidence from Polymarket

https://arxiv.org/abs/2604.24366
1•7777777phil•14m ago•0 comments

You couldn't create a more anti-news internet if you tried

https://mattdpearce.substack.com/p/you-couldnt-create-a-more-anti-news
2•cdrnsf•15m ago•0 comments

NBC orders 'Wordle' game show hosted by Savannah Guthrie

https://www.cnn.com/2026/05/11/media/nbc-wordle-game-show-savannah-guthrie
1•campuscodi•15m ago•0 comments

With Just One Word, Brandeis Is Trying to Change College Shopping

https://www.nytimes.com/2026/05/10/your-money/brandeis-college-cost-faye.html
1•apparent•15m ago•1 comments