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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!

Trump invokes Defense Production Act for munitions, supply chains

https://www.reuters.com/world/us/trump-invokes-defense-production-act-munitions-supply-chains-202...
2•petethomas•1m ago•0 comments

Binance set to lose permission to operate in EU

https://www.reuters.com/business/finance/binance-set-lose-eu-licence-bid-permission-offer-service...
1•petethomas•4m ago•0 comments

UK is banning children's social media use. Here's what other countries are doing

https://apnews.com/article/social-media-ban-children-global-glance-40595c56b1431880bd9a50857408ee83
1•1vuio0pswjnm7•7m ago•1 comments

Microsoft Weighs DeepSeek for Copilot Cowork

https://www.axios.com/2026/06/16/microsoft-copilot-cowork-tokenmaxxing-cowork
2•somenameforme•9m ago•0 comments

US holds off blacklisting China's DeepSeek, +100 firms deemed security risks

https://www.reuters.com/world/china/us-holds-off-blacklisting-chinas-deepseek-more-than-100-firms...
2•giuliomagnifico•11m ago•0 comments

Florida AG sues TikTok in latest move against tech giants

https://www.politico.com/news/2026/06/15/florida-lawsuit-tiktok-uthmeier-childrens-safety-00962084
2•1vuio0pswjnm7•12m ago•0 comments

Can gzip be a language model?

https://nathan.rs/posts/gzip-lm/
2•asasidh•16m ago•1 comments

Greenville TX "Welcome Sign" – The Story Behind

https://dallasgateway.com/greenville-tx-welcome-sign/
1•thunderbong•17m ago•0 comments

AmigaOS 2: The Greatest Upgrade

https://www.datagubbe.se/os20up/
1•HotGarbage•20m ago•0 comments

How agentic AI is rewiring Amazon's teams and upending its traditions

https://www.geekwire.com/2026/how-agentic-ai-is-rewiring-amazons-teams-and-upending-its-traditions/
1•Gaishan•21m ago•1 comments

How the UK Plans to Keep Children Off Social Media

https://www.bloomberg.com/news/articles/2026-06-15/social-media-ban-for-uk-s-under-16s-how-will-p...
1•1vuio0pswjnm7•22m ago•0 comments

DOJ claims xAI's gas turbines are a matter of 'national and energy security'

https://techcrunch.com/2026/06/16/doj-claims-xais-unpermitted-gas-turbines-are-a-matter-of-nation...
2•dlgeek•24m ago•1 comments

My router said sonnet. The invoice said fable

https://ax.necmttn.com
1•necmttn•30m ago•0 comments

Algorithmic Information Theory Data Compression Challenge

https://arxiv.org/abs/2606.17712
1•ahsillyme•31m ago•0 comments

Diary of a Disabled DJ – Entry 2

https://samhenrycliff.medium.com/diary-of-a-disabled-dj-entry-2-c64e31907ee5
1•6stringmerc•35m ago•0 comments

Chrome Extension That Disguises Claude as a Google Doc

https://twitter.com/om_patel5/status/2066011171967127643
2•vantareed•35m ago•0 comments

Made verifiable auth with no central credential store to breach. roast it

https://tidesupreme.github.io/
2•sashyo•35m ago•0 comments

Show HN: Loomcycle – a sidecar runtime for AI agents (Go binary, Apache-2.0)

https://github.com/denn-gubsky/loomcycle
2•denn-gubsky•40m ago•0 comments

Semiclassical Gravity Efficiently Solves NP-Complete Problems

https://arxiv.org/abs/2606.14806
5•ascarshen•40m ago•0 comments

Mastra compromised in supply chain attack

https://www.endorlabs.com/learn/mastra-npm-org-compromised-multiple-packages-trojanized-to-drop-a...
3•bugvader•41m ago•2 comments

Token spend is not token capital

https://twitter.com/TJWXF3/status/2067080353081356313
3•tomjwxf•43m ago•0 comments

Not everything needs to be groundbreaking

https://pipsthoughts.substack.com/p/not-everything-needs-to-be-groundbreaking
2•PenPressman•43m ago•1 comments

Malaysia's AI agent-powered messaging app Respond.io raises $62.5M

https://techcrunch.com/2026/06/15/malaysias-respond-io-raises-62-5m-eyes-acquisitions-in-north-am...
2•doppp•49m ago•0 comments

I Built a POS App for Businesses That Still Use Notebooks and Excel

https://www.indiehackers.com/post/i-built-a-pos-app-for-businesses-that-still-use-notebooks-and-e...
2•cas8398•49m ago•0 comments

US approval of Paramount/Warner Bros. deal surprised DOJ lawyers, report says

https://arstechnica.com/tech-policy/2026/06/us-approval-of-paramount-warner-bros-deal-surprised-d...
8•derbOac•55m ago•0 comments

Agentic Grocery Shopping on Uber Eats

https://www.uber.com/us/en/blog/uber-cart-assistant/
2•samrohn•56m ago•1 comments

Indian telecom operator Reliance sabotages Telegram access outside India

https://twitter.com/durov/status/2066945969854234977
3•aayushdutt•1h ago•0 comments

Show HN: SciFigureAI – AI figure maker for research papers

https://scifigureai.com
2•jiangyifeng•1h ago•0 comments

ZFSBootMenu

https://zfsbootmenu.org
4•porjo•1h ago•0 comments

Headroom

https://github.com/chopratejas/headroom
2•marc__1•1h ago•0 comments