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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•7mo 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 America Is Winning the Carbon Capture Race

https://oilprice.com/Energy/Energy-General/Why-America-Is-Winning-the-Carbon-Capture-Race.html
1•PaulHoule•19s ago•0 comments

DHH and Open Source

https://ma.tt/2025/12/dhh-open-source/
1•cratermoon•26s ago•0 comments

AI Turns the Firehose into a Funnel

https://www.niemanlab.org/2025/12/ai-turns-the-firehose-into-a-funnel/
1•speckx•1m ago•0 comments

I miss the old Qasar, not the new Qasar

https://qy.co/writings/newqasar/
1•stopachka•1m ago•0 comments

Streaming Comes into the Fold – IBM Confluent Acquisition Analysis

https://tomtunguz.com/ibm-confluent-acquisition-analysis/
1•nowflux•3m ago•0 comments

Campus Hook: a social directory for college students (2002)

https://www.scribd.com/document/964087828/Campus-Hook-business-plan
1•jlodwick•3m ago•1 comments

The Xonsh shell wrapped up 2025 with impressive improvements

https://github.com/xonsh/xonsh
1•ananany•4m ago•1 comments

Meta shifts to closed 'Avocado' AI model trained on Alibaba's Qwen

https://www.perplexity.ai/discover/top/meta-shifts-to-closed-avocado-Yd5AUbWsQw.ACDZxeNEzOA
1•chickensong•5m ago•0 comments

Predictions for Journalism 2026

https://www.niemanlab.org/collection/predictions-2026/
1•ChrisArchitect•5m ago•0 comments

Danish Spy Agency Now Views US as a Possible Security Concern

https://www.bloomberg.com/news/articles/2025-12-10/danish-spy-agency-now-views-us-as-a-possible-s...
3•sipofwater•8m ago•1 comments

Gregg Phillips, a Proponent of Election Conspiracy Theories, to Join FEMA

https://www.nytimes.com/2025/12/10/climate/gregg-phillips-fema.html
1•quapster•8m ago•0 comments

htpy: Generate HTML in Python

https://github.com/pelme/htpy
1•cl3misch•10m ago•0 comments

Show HN: Using WebMCP to make the CDP MCP server 90% more token efficient

https://github.com/WebMCP-org/chrome-devtools-quickstart
2•miguelspizza•11m ago•0 comments

US seizes tanker near Venezuela, Trump says

https://www.bbc.com/news/live/cy07yk63x80t
8•mikhael•17m ago•5 comments

Show HN: Cargo-rail: graph-aware monorepo tooling for Rust; 11 deps

https://github.com/loadingalias/cargo-rail
2•LoadingALIAS•18m ago•1 comments

OneUptime: Open-Source Datadog Alternative

https://oneuptime.com/
1•ndhandala•19m ago•0 comments

Apple Services Experiencing Outage

https://www.apple.com/support/systemstatus/
11•rock_artist•20m ago•3 comments

I ran DOOM on the Polkadot JAM blockchain on my laptop

https://www.youtube.com/watch?v=riyYJo-CKWE
2•danicuki•21m ago•1 comments

36 months and the Australia social media ban (2024)

https://bleepitybloopity.com/posts/social-media-ban/
2•navs•21m ago•0 comments

Twitter

https://www.twitter.new/
5•frizlab•22m ago•8 comments

LMArena Is a Cancer on AI

https://surgehq.ai/blog/lmarena-is-a-plague-on-ai
2•jumploops•23m ago•0 comments

AI chatbots can sway voters with remarkable ease

https://www.nature.com/articles/d41586-025-03975-9#ref-CR1
5•marojejian•24m ago•2 comments

The first learning-disabled artist to win the UK's most prestigious art award

https://www.theguardian.com/artanddesign/2025/dec/10/nnena-kalu-turner-prize-win-interview-disabl...
1•binning•24m ago•0 comments

We mapped 121,000 videos to figure out how TikTok learns your interests

https://www.washingtonpost.com/technology/interactive/2025/tiktok-algorithm-video-map-interests/
1•reaperducer•25m ago•0 comments

Italian cooking awarded Unesco cultural heritage status

https://www.bbc.co.uk/news/articles/c80x3p331lxo
2•binning•26m ago•0 comments

Collations in PostgreSQL: the good, the bad, and the ugly (2022) [pdf]

https://www.postgresql.eu/events/pgconfeu2022/sessions/session/4040/slides/337/Collations%20in%20...
1•ComputerGuru•28m ago•0 comments

SpaceX Installs Starlink Vending Machine in Iowa

https://www.pcmag.com/news/spacex-quietly-installs-starlink-vending-machine-in-iowa
2•rmason•29m ago•1 comments

In 1995, a Netscape employee wrote a hack in 10 days that now runs the Internet

https://arstechnica.com/gadgets/2025/12/in-1995-a-netscape-employee-wrote-a-hack-in-10-days-that-...
3•miltava•29m ago•4 comments

New OpenAI models likely pose "high" cybersecurity risk, company says

https://www.axios.com/2025/12/10/openai-new-models-cybersecurity-risks
3•fortran77•30m ago•0 comments

Zimbabwe's only female heart surgeon on medicine, misogyny & making a difference

https://www.theguardian.com/global-development/2025/dec/09/zimbabwes-only-female-heart-surgeon-on...
4•binning•31m ago•0 comments