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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•8mo 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!

Climate misinformation is threatening Canada's national security

https://thenarwhal.ca/climate-misinformation-national-security/
1•Teever•2m ago•0 comments

Workflow Description Language (WDL) 1.3

https://openwdl.org/wdl/bioinformatics/workflows/announcing-wdl-1-3-0/
1•azhenley•4m ago•0 comments

What's on HTTP?

https://whatsonhttp.com/
1•elixx•6m ago•0 comments

Seniority Is Clarity Not Cleverness

https://dontbreakprod.com/posts/seniority-is-clarity-not-cleverness
2•dorkrawk•8m ago•0 comments

I Taught Myself to Code on a Cracked Android Phone. Now I Can't Get Hired

https://www.rly0nheart.com/posts/life/i-taught-myself-to-code-on-a-cracked-android-phone-now-i-ca...
6•boyter•15m ago•1 comments

Abuse report review pending for a month now

https://community.cloudflare.com/t/abuse-report-review-pending-for-a-month-now/876217
1•mritzmann•16m ago•0 comments

First open-source UCP merchant sandbox – test your AI shopping agents

https://github.com/steven2030/ucp-merchant
2•Stevenochs•16m ago•1 comments

Nvidia: Using Context as Training Data Unlocks Models That Learn at Test-Time

https://developer.nvidia.com/blog/reimagining-llm-memory-using-context-as-training-data-unlocks-m...
1•ashvardanian•17m ago•0 comments

A Hidden Blob of Water Has Abruptly Reappeared in the Atlantic

https://www.popularmechanics.com/science/environment/a69975772/atlantic-equitorial-water-found/
1•kayo_20211030•17m ago•0 comments

Productivity

https://en.wiktionary.org/wiki/productivity
1•downboots•19m ago•1 comments

Aligning Games and Sets in Determining Tennis Matches

https://www.nyu.edu/about/news-publications/news/2026/january/aligning-games-and-sets-in-determin...
1•geox•19m ago•0 comments

The Next Dust Bowl Is Becoming More Likely

https://www.bloomberg.com/opinion/articles/2026-01-12/the-next-dust-bowl-is-becoming-more-likely
5•cwwc•21m ago•1 comments

Powell says Trump administration has threatened him with a criminal indictment

https://www.reuters.com/business/finance/feds-powell-says-administration-has-threatened-criminal-...
4•platevoltage•21m ago•1 comments

Trump announces 25% tariff on countries 'doing business' with Iran

https://www.ft.com/content/c266f78d-1b53-4aa5-99ff-1726a5126a23
7•alephnerd•24m ago•0 comments

An FAQ on Reinforcement Learning Environments

https://epoch.ai/gradient-updates/state-of-rl-envs
1•dcre•25m ago•0 comments

Mastering Memory Management and Garbage Collection in .NET

https://nemorize.com/roadmaps/mastering-memory-management-and-garbage-collection-in-net
1•reverseblade2•26m ago•0 comments

Deciphering Academic Slop [video]

https://www.youtube.com/watch?v=Gu_L8MPvGJM
1•bobajeff•26m ago•0 comments

StyleX: A Styling Library for CSS at Scale

https://engineering.fb.com/2025/11/11/web/stylex-a-styling-library-for-css-at-scale/
1•mostdefinite1•27m ago•0 comments

YC Cofounder Matching inbox stuck in infinite loading loop – anyone else?

2•founder_mode•28m ago•0 comments

Show HN: I vibe coded a site to virtually crate dig for new music

https://crate-digging.vercel.app/
1•durutti•29m ago•0 comments

Free Developer and Designer Tools

https://toolvault.co
2•Aaevro•29m ago•0 comments

Staging is a wasteful lie: the case for the mono-environment

https://www.tomwphillips.co.uk/2026/01/staging-is-a-wasteful-lie-the-case-for-the-mono-environment/
2•gpi•30m ago•0 comments

Stewart Cheifet, Host of TV's 'Computer Chronicles,' Dies at 87

https://www.nytimes.com/2026/01/10/technology/stewart-cheifet-dead.html
2•reaperducer•33m ago•1 comments

Ask HN: How do you find well-moderated communities

3•pllbnk•38m ago•0 comments

Is it better to rent or buy?

https://www.economist.com/finance-and-economics/2026/01/07/is-it-better-to-rent-or-buy
1•andsoitis•39m ago•0 comments

Prompting as Design

https://substack.com/inbox/post/184360602
1•JTan2231•40m ago•0 comments

Apple and Google's Minimalist AI Announcement Is a Flex

https://www.siliconsnark.com/apple-and-googles-minimalist-ai-announcement-is-a-flex/
2•SaaSasaurus•43m ago•1 comments

Complex life on planets orbiting the galaxy's most common stars may be unlikely

https://phys.org/news/2026-01-complex-life-planets-orbiting-galaxy.html
2•bikenaga•45m ago•1 comments

Schismogenesis

https://en.wikipedia.org/wiki/Schismogenesis
1•foster_nyman•48m ago•0 comments

I built an SDK to make M-pesa integration easy

https://payments-js.singularity.co.ke/
1•wambuakelvin_•50m ago•0 comments