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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!

U.S. murder rate approaches a record low

https://www.npr.org/2026/06/30/nx-s1-5866810/us-murder-rate-record-low-crime-homicide
1•toomuchtodo•2m ago•0 comments

Claude Fable 5 available globally tomorrow

https://twitter.com/anthropicai/status/2072163884430229756
2•jitl•7m ago•0 comments

Ask HN: If governments keep restricting frontier AI, what happens next?

1•akashwadhwani35•7m ago•0 comments

The Oracle Problem

https://pilgrima.ge/p/the-oracle-problem
2•paulpauper•10m ago•0 comments

Is Claude's Constitution Aligned with Planetary Flourishing?

https://cathalharte.ch/essay-is-claudes-constitution-aligned-with-planetary-flourishing.html
1•paulpauper•10m ago•0 comments

Scientists discover unexpected way to make pancreatic cancer cells self-destruct

https://www.sciencedaily.com/releases/2026/06/260622091512.htm
1•jonbaer•11m ago•0 comments

Tracing Codex's 640TB-a-year SQLite writes

https://querydoctor.com/blog/tracing-codexs-640tb-year-sqlite-writes
1•thunderbong•11m ago•0 comments

Syncpen: A Markdown writing app your AI can write in (Claude, Cursor, Cowork)

https://www.syncpen.io/
1•airbuzz•12m ago•0 comments

WhatsApp Coding – Managing Google Antigravity 2.0 via a mobile chat proxy

https://github.com/rajibbora1965/WhatsAppCoding
1•rajibbora•14m ago•0 comments

Modular Cognitive Architecture Emerges in Large Language Models

https://pengrui-han.github.io/LLM_Modularity_Page/
1•pulisse•15m ago•0 comments

BullRun – free global stock screener with an MCP server

https://bull-run.org/
1•ferinator•15m ago•1 comments

Firms that adopt AI grow headcount 10% over the two years following adoption

https://ramp.com/data/ai-jobs-impact
2•nreece•18m ago•0 comments

What ORMs have taught me: just learn SQL (2014)

https://wozniak.ca/blog/2014/08/03/1/index.html
1•ciconia•18m ago•0 comments

Why do teams keep losing context, and why hasn't any tool fixed it?

1•rihabzt•20m ago•0 comments

Trump's second-term windfall: $1.4B

https://www.politico.com/news/2026/06/30/trump-crypto-windfall-disclosures-00983207
1•Alien1Being•21m ago•0 comments

Vektor Slipstream v1.7.4: Effort Control and Real Memory Search

https://medium.com/@vektormemory/vektor-slipstream-v1-7-4-effort-control-real-memory-search-e62d4...
1•vektormemory•23m ago•0 comments

The Virtual Drug That Created Fortnite

https://comuniq.xyz/post?t=1339
2•01-_-•31m ago•0 comments

Chinese tech makes desalinating seawater cheaper than producing bottled water

https://www.scmp.com/news/china/science/article/3358699/chinese-tech-makes-desalinating-seawater-...
3•01-_-•32m ago•1 comments

IBM claims first sub-1 nanometer chip technology

https://arstechnica.com/gadgets/2026/06/ibm-claims-worlds-first-sub-1-nanometer-chip-technology/
1•surprisetalk•36m ago•0 comments

A new Plaza Accord for global currencies wouldn't work

https://www.economist.com/finance-and-economics/2026/06/30/a-new-plaza-accord-for-global-currenci...
1•petethomas•39m ago•0 comments

Ireland is big tech's lapdog – and that compromises its EU presidency

https://www.theguardian.com/commentisfree/2026/jun/30/ireland-big-tech-lapdog-eu-presidency-digit...
3•TMWNN•39m ago•0 comments

Single header Parser Combinators for C

https://github.com/steve-chavez/CParseC
2•steve-chavez•40m ago•0 comments

The fat cats of state government

https://scottvanvoorhis.substack.com/p/serving-the-public-or-serving-themselves
2•sbvanvoorhis•45m ago•0 comments

Vinton Cerf Is Retiring from Google

https://techcrunch.com/2026/06/30/the-father-of-the-internet-is-finally-retiring/
3•coloneltcb•48m ago•0 comments

Leash: Browser Without URL Bar

https://www.leash.ax
1•bergie•50m ago•0 comments

Russia's plan to drill in Arctic revives controversial theory of 'endless oil'

https://www.science.org/content/article/russia-s-plan-drill-superdeep-holes-arctic-revives-contro...
4•Tomte•52m ago•0 comments

Private equity fund investors turn to debt-like deals in downturn

https://www.ft.com/content/4675b8bb-4047-458a-be01-90c2aff29219
2•petethomas•52m ago•3 comments

Trump reports over $1.4B in income from crypto ventures

https://www.reuters.com/world/us/trump-reports-more-than-14-billion-income-crypto-ventures-2026-0...
13•kaycebasques•54m ago•3 comments

CertAlloc–An O(1) memory allocator formally verified -TLA+ and CBMC

https://github.com/thedevilhimselfcodes/CertAlloc
2•VindanaSandun•56m ago•0 comments

Found a great blog on Advance Threat Intel

1•RawatManish•57m ago•0 comments