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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!

HuggingFace is down due to global AWS outage

https://status.huggingface.co/
1•armcat•55s ago•0 comments

Spotify removes 75 million "AI slop" songs

https://www.abc.net.au/news/2026-07-16/spotify-making-ai-music-easier-to-detect/106919814
1•lexandstuff•2m ago•0 comments

A free, hands-on cybersecurity foundations certificate

https://hackviser.com/core
1•sadican•3m ago•0 comments

At DocuWriter.ai, the documentation will make you smile:)

https://www.docuwriter.ai/
1•magarrent•3m ago•0 comments

Tell HN: CloudFront VPC Origins is down

3•cyounkins•5m ago•1 comments

AI and the paradox of self-replacing workers [video]

https://www.ted.com/talks/madison_mohns_ai_and_the_paradox_of_self_replacing_workers
1•fagnerbrack•5m ago•0 comments

I created OpenClaw, the breakthrough AI agent [video]

https://www.ted.com/talks/peter_steinberger_how_i_created_openclaw_the_breakthrough_ai_agent
1•fagnerbrack•5m ago•0 comments

Stackoverflow 2026 Developer Survey

https://take.survey.stackoverflow.co/jfe/form/SV_4GHunpL3IfJ3rRc
1•throw_await•6m ago•1 comments

Show HN: UOLT – 34 coreutils rewritten in x86_64 assembly, no Libc, no heap

https://github.com/thooams/uolt
1•thooams•7m ago•0 comments

Will the real oppressed group please stand up?

https://digdeeper.neocities.org/articles/oppression.xhtml
1•Gecko4072•12m ago•0 comments

Fyne: Build beautiful cross-platform apps in Go

http://fyne.io
1•thunderbong•13m ago•0 comments

Unpacking the AsyncAPI NPM supply chain compromise, import-time payload delivery

https://www.microsoft.com/en-us/security/blog/2026/07/15/unpacking-asyncapi-npm-supply-chain-comp...
2•nyku•13m ago•0 comments

Show HN: Bring modern package management to Meson's native wrap ecosystem

https://collider.ee/1.5.1/
1•mog_dev•13m ago•0 comments

TLS Certificate Validation on Linux

https://www.tomica.net/blog/2026/07/tls-certificate-validation-on-linux/
2•peregrinus_13•14m ago•0 comments

The Missed Reality: Code Review Wasn't Built for the AI Era

1•axsdrizz•18m ago•0 comments

Show HN: A map of cafes that are in the sun

https://sunny.coffee/
5•BrunoJo•22m ago•0 comments

Northstar – AI PR review for Azure DevOps teams (flat price, not per-seat)

https://northstardevops.com/
1•ginoarpesella•26m ago•0 comments

Show HN: Glad-AI-Tor, the "best" AI tools judged by the crowd

https://glad-ia-tor.com
2•GiornoJojo•29m ago•0 comments

Semantic transactions: securing untrusted AI agent workflows at the OS boundary

https://latentdynamics.substack.com/p/semantic-transactions-securing-untrusted
2•Ayauho•34m ago•0 comments

Thinking: Alternate Distribution for Filmmakers

2•phaedrus044•34m ago•0 comments

Show HN: Where NYC films – 6k shooting permits analyzed

https://civicdataforge.pages.dev/where-nyc-films
1•Chungus1172•37m ago•0 comments

CharXiv: Charting Gaps in Realistic Chart Understanding in Multimodal LLMs(2024)

https://arxiv.org/abs/2406.18521
1•hamburgererror•37m ago•0 comments

Where are YC founders now? OpenAI and Anthropic, mostly

https://joinedanthropic.com
4•ohong•37m ago•0 comments

Liberal Crime Squad: New Age

https://github.com/ashley-s-fox/lcs-new-age
2•bean469•48m ago•0 comments

Ask HN: Best way to buy second hand compute (in a future AI crash)

3•lifeisstillgood•49m ago•1 comments

How to Make a Font

https://www.makingsoftware.com/chapters/how-to-make-a-font
2•Brajeshwar•49m ago•0 comments

Unifeyn, an AI study workspace grounded in your own documents

https://www.unifeyn.app
1•securemepro•53m ago•0 comments

OpenAI Releases Codex Micro

https://openai.com/de-DE/supply/co-lab/work-louder/
1•zeeez•55m ago•0 comments

"Useful" is not sufficient

https://tante.cc/2026/07/15/useful-is-not-sufficient/
2•ttiurani•55m ago•0 comments

Show HN: Trellis2.c – Local 3D generation with Vulkan and CUDA

https://github.com/Wimacs/trellis2.c
1•wimaxs•1h ago•0 comments