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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!

Sarvam Code

https://www.sarvam.ai/products/coding-agents
1•pixxxel•33s ago•0 comments

Design and simulate 16×2 or 20×4 Arduino displays in seconds

https://www.pockeng.com/tools/lcd.html
1•levario•1m ago•0 comments

My 3 SaaS are evaporating. RIP indie hacking (2018-2026)

https://twitter.com/gherget/status/2082784434726592780
2•gaborme•6m ago•0 comments

Excessive time spent online linked to stress and worse mood – study

https://www.theguardian.com/technology/2026/jul/29/excessive-time-spent-online-linked-to-stress-a...
2•giuliomagnifico•8m ago•0 comments

Cleaning Out Inboxes: TA488 Comes for Outlook with Another Half-Click Exploit

https://www.proofpoint.com/us/blog/threat-insight/cleaning-out-inboxes-ta488-comes-outlook-anothe...
1•romaniitedomum•8m ago•0 comments

Our Research Team Developed a More Efficient Audio Embedding Model

https://www.edgeimpulse.com/blog/how-our-research-team-developed-a-more-efficient-audio-embedding...
1•dansitu•9m ago•0 comments

Show HN: Claude Skill for ASD-STE100 – Simplified English

https://github.com/blagoySimandov/asd-ste100-writer-skill
2•blagoysimandoff•13m ago•0 comments

Copy Error in Apple's Developer Program Signup Screen

https://drive.google.com/file/d/1Pn5MNH-vaIKVOqZyueLQq_5a7psra9BL/view?usp=sharing
1•rcshubhadeep•14m ago•1 comments

Software Foundations Series

https://softwarefoundations.cis.upenn.edu/
1•iamanatom•15m ago•0 comments

Uefa to discuss boycotting World Cup in emergency meeting after FIFA bombshell

https://www.independent.co.uk/sport/football/fifa-world-cup-uefa-boycott-meeting-infantino-news-b...
1•vrganj•15m ago•0 comments

A fundamental flaw leaves LLMs strikingly vulnerable to attack

https://www.technologyreview.com/2026/07/30/1140927/a-fundamental-flaw-leaves-llms-vulnerable-to-...
2•joozio•16m ago•0 comments

OpenAI's Hacking Debacle Was a Human Mistake

https://www.wired.com/story/openais-hacking-debacle-was-a-human-mistake/
1•smurda•18m ago•0 comments

Need a Personal Injury Lawyer in Glasgow?

https://www.khanlaw.co.uk/
1•listingskdm•18m ago•1 comments

Show HN: A minimalist proxy for your local LLM cluster (~1100 lines)

https://github.com/robolamp/smol-llm-proxy
1•snowy_robolamp•21m ago•0 comments

The Chinese robot army transforming the UK's retail industry

https://www.bbc.co.uk/news/articles/c0jl8v23qwgo
1•edward•21m ago•0 comments

Parseword

https://www.parseword.com
1•bookofjoe•22m ago•0 comments

Typeless is stripping away my thought process

https://en.astrian.lol/think-dont-speak/
1•Astrian•22m ago•0 comments

Code Page 437

https://en.wikipedia.org/wiki/Code_page_437
1•tosh•23m ago•0 comments

When I failed the Microsoft interview

https://ochagavia.nl/blog/that-time-when-i-failed-the-microsoft-interview/
1•birdculture•24m ago•0 comments

"The Proximal Origin of SARS-CoV-2"

https://www.whitehouse.gov/lab-leak-true-origins-of-covid-19/
2•just_some_user•26m ago•1 comments

Mythos attack on 3rd-round PQC algorithm candidate puts it out of commission

https://arstechnica.com/security/2026/07/mythos-uncovers-crypto-weaknesses-that-went-unknown-for-...
3•throw0101a•28m ago•0 comments

k/simple

https://github.com/kparc/ksimple
1•tosh•31m ago•0 comments

BeHive – Open-source research engine that outputs structured claims, not essays

https://github.com/qa10devteam/behive
1•qadevteam•33m ago•0 comments

Origami research takes top prize at 2026 Regeneron ISEF competition

https://www.snexplores.org/article/2026-regeneron-isef-winners-origami
1•viscousviolin•33m ago•1 comments

Created Mono8 (PICO-8 style game engine built on MonoGame, .NET 8)

https://mono8games.itch.io/mono8
1•rurhdhdije•33m ago•1 comments

Coinbase moved to open models. Cut AI spend in half while increasing token usage

https://twitter.com/brian_armstrong/status/2070670644577280109
3•smurda•34m ago•0 comments

A Most Comfortable Dead End

https://monokai.com/articles/a-most-comfortable-dead-end/
1•monokai_nl•34m ago•0 comments

Frhog

https://www.frhog.com/?ribbit
1•krm01•35m ago•0 comments

In AI arms race, Swiss neutrality is double-edged sword

https://www.swissinfo.ch/eng/foreign-affairs/swiss-neutrality-is-double-edged-sword-in-ai-arms-ra...
1•TMWNN•37m ago•0 comments

Gpiozero Flow

https://bennuttall.com/blog/2026/07/gpiozero-flow/
21•benn_88•45m ago•3 comments