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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!

IceCream – Never use print() to debug again

https://github.com/gruns/icecream
1•gregsadetsky•1m ago•0 comments

Claude Is Painful

2•kderbyma•2m ago•0 comments

Deepsec

https://github.com/vercel-labs/deepsec
1•handfuloflight•7m ago•0 comments

AI Mania Is Eviscerating Global Decision-Making

https://ludic.mataroa.blog/blog/ai-mania-is-eviscerating-global-decision-making/#fnref:3
1•subset•11m ago•1 comments

Prompt Injection Attacks Are Thwarting AI Hacking Agents

https://arstechnica.com/security/2026/07/now-defenders-are-embracing-the-prompt-injection-too/
1•sbulaev•13m ago•1 comments

Doctors question evidence behind Pentagon plan for testosterone screening

https://www.theguardian.com/us-news/2026/jul/18/us-military-testosterone-screening-doctors
1•wslh•15m ago•1 comments

University of Illinois is insuring itself against a drop in Chinese students

https://www.chicagobusiness.com/education/university-illinois-insurance-decline-chinese-enrollment/
1•MaysonL•16m ago•1 comments

AI as Normal Technology

https://knightcolumbia.org/content/ai-as-normal-technology
1•elsewhen•17m ago•0 comments

Ergonomic keyboard generator with hand scanning

https://ryanis.cool/cosmos/
1•ffin•20m ago•0 comments

My app just got approved by the App Store

https://apps.apple.com/us/app/kleios/id6765974356
2•idclark34•24m ago•4 comments

No, an AI cannot know the future and never will..

https://pulkitsharma.substack.com/p/no-an-ai-cannot-know-the-future-and
1•pulkitsh1234•24m ago•0 comments

Cash is king again at Tokyo's bars after credit processor fails

https://www.japantimes.co.jp/business/2026/07/14/companies/zentoshin-kabukicho-bar-cash/
1•mikhael•24m ago•0 comments

Flightwake – a flight recorder for AI coding agents, not a navigator

https://github.com/kaiwutech-TW/flightwake
1•kaiwuTW•26m ago•0 comments

Superformula

https://en.wikipedia.org/wiki/Superformula
2•elsewhen•28m ago•0 comments

Social media algorithms: accumulated aesthetic artifacts

https://henderson.lol/posts/202607-social-media-algorithms-accumulated-aesthetic-artifacts
2•hendersonreed•36m ago•0 comments

Cloud providers are out of B200 GPUs after the Inkling release

https://twitter.com/Akashi203/status/2078615659366252877
3•Jr23_xd•40m ago•0 comments

Better and Cheaper Than IPTV

https://github.com/stupside/castor
10•xonery•40m ago•1 comments

Lobsters Interview with matheusmoreira about Lone Lisp

https://alexalejandre.com/interviews/interview-with-matheus-moreira/
3•birdculture•42m ago•1 comments

Show HN: EnviousWispr, an open-source Wispr Flow alternative for macOS

https://github.com/saurabhav88/EnviousWispr
1•EnviousLabs•47m ago•0 comments

I built code-repair training data and shipped the eval so you can rerun it

https://huggingface.co/datasets/TrueSET/verified-code-repair
1•TrueSET_Data•48m ago•2 comments

The Pope and the Antichrist by Peter Thiel

https://firstthings.com/the-pope-and-the-antichrist/
2•kerim-ca•50m ago•1 comments

Miserere (Allegri)

https://en.wikipedia.org/wiki/Miserere_(Allegri)
2•thunderbong•59m ago•0 comments

AI Assisted Vulnerability Research on Embedded Targets

https://quentinkaiser.be/security/2026/07/18/ia-assisted-vuln-research/
1•snorbleck•1h ago•0 comments

Cmpunlocker – Unlock Full GA100 Compute and 64GB HBM2e on the Nvidia CMP 170HX

https://github.com/amoghmunikote/cmpunlocker
1•amoghmunikote•1h ago•0 comments

Transcribe.cpp

https://workshop.cjpais.com/projects/transcribe-cpp
25•sebjones•1h ago•3 comments

One token is enough: fingerprinting LLMs from one token output distributions

https://arxiv.org/abs/2607.10252
3•anigbrowl•1h ago•0 comments

AI as Normal Technology- What Will Be Left for Us to Work On?

https://www.cs.princeton.edu/~arvindn/talks/icml-2026-annotated-slides/#
2•aanet•1h ago•5 comments

The 2026 Developer Survey is Live

https://meta.stackoverflow.com/questions/439978/the-2026-developer-survey-is-live
3•joshdavham•1h ago•2 comments

Updating IP Regulations for AI Distillation

https://www.marble.onl/posts/copyright_vs_ai.html
1•amarble•1h ago•0 comments

Ask HN: What is best thing to do if you are gonna rebuilt your website

3•anitroves•1h ago•4 comments