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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•10mo 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!

Why the Persian Gulf has more oil and gas than anywhere else on Earth

https://theconversation.com/why-the-persian-gulf-has-more-oil-and-gas-than-anywhere-else-on-earth...
1•pseudolus•59s ago•0 comments

Maine Is About to Become the First State to Ban New Data Centers

https://www.wsj.com/us-news/maine-data-center-ban-e768fb18
1•toomuchtodo•1m ago•0 comments

Sam Altman on Building the Future of AI [video]

https://forum.openai.com/public/videos/event-replay-sam-altman-on-building-the-future-of-ai-2026-...
1•erickhill•4m ago•0 comments

Phillips Machine

https://en.wikipedia.org/wiki/Phillips_Machine
2•curio_Pol_curio•7m ago•0 comments

Show HN: Mdstitch – NPM for Markdown Files

https://github.com/tannerjames711/mdstitch
1•tannerjames711•7m ago•0 comments

Bill Phillips used flowing water to model the economy

https://www.npr.org/sections/planet-money/2026/04/07/g-s1-116575/how-bill-phillips-used-flowing-w...
2•curio_Pol_curio•9m ago•0 comments

Visual Hallucinations in Psychedelics vs. Schizophrenia

https://psychedelirium.substack.com/p/pharmacology-vs-pathology-of-altered
1•yenniejun111•18m ago•0 comments

'This Is Just Not How the Human Race Should Operate,' Says US Senator

https://www.commondreams.org/news/chris-murphy-trump-threat
6•hkhn•21m ago•0 comments

OpenSource: Native screen recorder extension for Chrome

https://github.com/mbarlow/chrome-recorder
1•moo-jason•25m ago•1 comments

Larger and more instructable language models become less reliable

https://pmc.ncbi.nlm.nih.gov/articles/PMC11446866/
3•gmays•25m ago•0 comments

America: A Bet Worth Taking If You're Built for It

https://code2net.com/usa
2•xyz_ielh•33m ago•2 comments

Nodepad

https://www.nodepad.space/
2•skogstokig•34m ago•0 comments

Show HN: Arrow – A Simple Airdrop Clone

https://github.com/aabiji/arrow
1•aabiji•35m ago•0 comments

Brands Adopt 'No AI' Disclaimers to Stand Out Amid the Slop

https://www.wsj.com/cmo-today/brands-adopt-no-ai-disclaimers-to-stand-out-amid-the-slop-a92352af
4•bookofjoe•36m ago•2 comments

Insurers' $1T Buildup in Private Credit Is Leaving Regulators in Dust

https://www.wsj.com/finance/regulation/insurers-1-trillion-buildup-in-private-credit-is-leaving-r...
4•petethomas•41m ago•0 comments

Show HN: Redos-analyzer – static ReDoS detection and auto-fix for Python

https://github.com/HarshithReddy01/redos-analyzer
1•kingkongsatan•41m ago•0 comments

Artemis delivers some exceptional, high-quality photos of the Moon

https://arstechnica.com/space/2026/04/the-artemis-ii-mission-sends-back-stunning-images-of-the-fa...
4•jonbaer•42m ago•1 comments

InstaMed – Oral Dissolving Peptides with InstaRelease Technology

https://store.getinstamed.com/
1•evo_9•43m ago•0 comments

RNA barcodes enable high-speed mapping of connections in the brain

https://news.illinois.edu/rna-barcodes-enable-high-speed-mapping-of-connections-in-the-brain/
1•geox•44m ago•0 comments

He designed C++ to solve your code problems

https://stackoverflow.blog/2026/04/07/he-designed-c-to-solve-your-code-problems/
1•chrisaycock•48m ago•0 comments

Release Please

https://github.com/googleapis/release-please
1•b-man•51m ago•0 comments

Show HN: Omni Voice – AI Voice Cloning and Text-to-Speech Platform

https://omnivoice.app
2•danielmateo773•53m ago•0 comments

Training SOTA vulnerability discovery agents through RL

https://depthfirst.com/post/dfs-mini1-agent
2•growthgod•53m ago•0 comments

Personal Site Infrastructure, Diagrammed

https://www.coryd.dev/posts/2026/personal-site-infrastructure-diagrammed
1•cdrnsf•59m ago•0 comments

Apollo.io Acquires Pocus

https://www.morningstar.com/news/pr-newswire/20260319ne14558/apolloio-acquires-pocus-to-advance-i...
1•jenthoven•1h ago•0 comments

Drive9, a network drive with built-in semantic search

https://github.com/mem9-ai/drive9
1•jinqueeny•1h ago•0 comments

How Alive Can a Video Game Street Be?

https://www.youtube.com/watch?v=5wU4AB7Y2Kw
2•pippy360•1h ago•1 comments

Impact of 100% Adoption of AI Coding Agents by Non-Technical Team

https://www.kapwing.com/blog/how-we-achieved-100-adoption-of-ai-coding-agents/
2•jenthoven•1h ago•0 comments

Russia and China veto UN resolution aimed at reopening the Strait of Hormuz

https://apnews.com/article/un-iran-us-strait-hormuz-bahrain-resolution-640e644b57df5c762ed9c57ef8...
5•WaitWaitWha•1h ago•0 comments

ICE acknowledges it is using powerful spyware

https://text.npr.org/nx-s1-5776799
12•dnemmers•1h ago•1 comments