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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!

AI agents beating human made tools at molecular discovery

https://twitter.com/intology/status/2117642701890105725
1•ronareltest•1m ago•1 comments

NewsNest – self-hosted news reader that ranks stories by my interests

https://github.com/Lucifix/newsnest
1•Lucifix2•3m ago•1 comments

Common beliefs about DNSSEC put to the test

https://circleid.com/posts/common-beliefs-about-dnssec-put-to-the-test-an-invitation-to-fact-chec...
1•ibobev•7m ago•0 comments

Pratt parsing is a black box

https://vinipsmaker.github.io/blog/article/pratt-parsing-is-a-black-box/
1•ibobev•7m ago•0 comments

When Does Your Acme Client Renew?

https://devops-daily.com/posts/lets-encrypt-64-day-certificates-renewal-check
1•ibobev•8m ago•0 comments

Show HN: Traccia – Vendor-neutral runtime control for AI agents

https://github.com/traccia-ai/traccia-py
1•vijaypoudel•8m ago•1 comments

Userland Linux scheduler in Rust – faster than time

https://kapteko.com/userland-linux-scheduler-in-rust/
1•fessguid•9m ago•0 comments

AI 'panic': Back office jobs cut – but not the expected roles

https://www.rnz.co.nz/news/science-and-technology/2327983/ai-panic-back-office-jobs-cut-but-not-t...
3•billybuckwheat•11m ago•0 comments

Formalizing Nvidia PTX in Lean to Prove GPU Kernel Correctness

https://sf-tensor.com/engineering/formalizing-ptx
1•adamnemecek•11m ago•0 comments

How astronauts are casting their mid-term votes from space

https://time.com/article/2026/11/03/how-astronauts-are-casting-their-midterm-votes-from-space/
1•dcminter•12m ago•0 comments

Show HN: Bookmarker - A minimal, private bookmark organizer for macOS

https://github.com/meraccos/bookmarker
1•meraccos•12m ago•2 comments

Show HN: ZapFast, Native WhatsApp for Linux, macOS, and Windows with Calls

https://zapfast.rocks/
3•earcar•16m ago•1 comments

Pyinfra – simple infrastructure automation in Python

https://death.andgravity.com/pyinfra
1•lumpa•17m ago•0 comments

SurrealDB 4 and SurrealDB Earth: A serverless database built on Cloudflare

https://surrealdb.com/earth
4•tobiemh•18m ago•0 comments

Core to core is not core to core

https://jacen.li/writings/core-to-core-is-not-core-to-core/
1•ceryle•19m ago•0 comments

Revived Pig Kidneys Frozen for a Year Could Rewrite Future of Organ Transplants

https://gizmodo.com/scientists-just-revived-pig-kidneys-frozen-for-a-year-it-could-rewrite-the-fu...
1•gmays•20m ago•0 comments

New Security Developer at the PSF

https://pyfound.blogspot.com/2026/10/announcing-new-security-developer-2026.html
1•lumpa•20m ago•0 comments

Kimi-k3-in-C: A 2.78T-parameter model. No GPU. 8 GB of RAM

https://github.com/FareedKhan-dev/kimi-k3-in-c
1•theHocineSaad•20m ago•1 comments

Nine engineers, 1,211 PRs in a day: Lessons from building Copilot Cowork

https://commandline.microsoft.com/how-we-built-copilot-cowork-python-to-rust-migration/
1•droidjj•21m ago•0 comments

The Return of the Stock Market

https://siliconempires.substack.com/p/the-return-of-the-stock-market
1•smartmic•22m ago•0 comments

Spar – Make Claude and Codex argue to get the best outputs

https://github.com/spar-ai-app/spar
1•dotarsojat•22m ago•0 comments

$20M in Fines and Vizio Smart TVs Opt Out of Spying Option Does Nothing

https://pcper.com/2026/11/20-million-in-fines-and-still-vizio-smart-tvs-opt-out-of-spying-option-...
3•speckx•23m ago•0 comments

Show HN: HackerByte – Finding promising AI stories by analyzing HN discussions

https://hackerbyte.net
1•bakigul•24m ago•0 comments

Improved asteroid deflection model runs faster, reveals more doomsday worries

https://www.theregister.com/science/2026/11/03/improved-asteroid-deflection-model-runs-faster-rev...
1•jjgreen•26m ago•0 comments

Anomaly detection for alerting: statistics, LLMs and decision models compared

https://anomaly-detection.coroot.com/
1•nikolay_sivko•27m ago•0 comments

Show HN: A framework for Raspberry Pi pico projects

https://github.com/AdrianCX/picohive-firmware
1•AdrianCX•30m ago•0 comments

Show HN: Twitter but you can only use paint

https://peck.pikju.com/
1•baby•32m ago•0 comments

100 Fly Brains Play Doom

https://namespace.so/blog/fly-brains-play-doom
1•benwen•32m ago•0 comments

Three Points on AI Safety

https://nicholasdecker.substack.com/p/three-points-on-ai-safety
1•speckx•34m ago•0 comments

Odin OS: Cryptographically authorized memory access on RISC-V

https://zenodo.org/records/23928302
1•nwalker85•34m ago•0 comments