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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!

Fisher Information in Kinetic Theory

https://arxiv.org/abs/2501.00925
1•tzury•14m ago•0 comments

Writing an NES Emulator in Haskell

https://arthi-chaud.github.io/posts/funes/
2•todsacerdoti•18m ago•0 comments

Flutter and React Native App Development in Coimbatore – Cross-Platform Pros

https://jeevantech.in/services/mobile-application-development-services/
1•Jeevandigital•20m ago•1 comments

The story of reinforcement-learning-with-verifiable-reward-rlvr

1•wsmhy2011•26m ago•0 comments

Demystifying Determinism in Durable Execution

https://jack-vanlightly.com/blog/2025/11/24/demystifying-determinism-in-durable-execution
1•PaulHoule•27m ago•0 comments

Tell HN: Claude rate limits are 2x higher through 12/31

1•keepamovin•28m ago•1 comments

Physics of Covid-19 Transmission (2020)

https://ocw.mit.edu/courses/res-10-s95-physics-of-covid-19-transmission-fall-2020/video_galleries...
2•nill0•29m ago•0 comments

Scale Architecture for Deep Learning [pdf]

https://cdn.sanity.io/files/e4qjo92p/production/2d7fa58e3b820715664bcf42097e86c05070c161.pdf
1•mahirsaid•38m ago•1 comments

The Future of Software Engineering: Efficiency, Learning Velocity, Small Teams

https://blog.rastrian.dev/post/the-future-of-software-engineering-efficiency-learning-velocity-sm...
1•rastrian•51m ago•0 comments

China is building most powerful hydropower system deep in the Himalayas

https://www.cnn.com/2025/12/17/china/china-largest-hydropower-dam-intl-hnk-dst
2•thunderbong•52m ago•0 comments

Rob Pike Goes Nuclear over GenAI

https://imgur.com/nUJCI3o
116•signa11•57m ago•39 comments

How Email Works

https://sushantdhiman.substack.com/p/how-email-actually-works-ep-1-behind
1•signa11•1h ago•0 comments

Going boldly into the COSMIC desktop environment

https://lwn.net/Articles/1050268/
3•signa11•1h ago•0 comments

Multiscale Aperture Synthesis Imager

https://www.nature.com/articles/s41467-025-65661-8
1•wisty•1h ago•0 comments

Trump Administration to Overhaul Lottery System for H-1B Visas

https://www.ft.com/content/2e50f86f-2a40-4e5c-9470-7978b979c081
2•dsmark•1h ago•2 comments

The Optimization Trap: Why Doing Everything Right Feels Wrong

https://www.slideshare.net/slideshow/the-optimization-trap-why-doing-everything-right-feels-wrong...
3•realitydrift•1h ago•0 comments

Apple's App Course Runs $20k a Student. Is It Worth It?

https://www.wired.com/story/apple-app-making-course-michigan-state-university/
1•gpi•1h ago•0 comments

Encryption is not enough: Shifting the economics of surveillance

https://drive.proton.me/urls/ZTM6NE0D70#5o2bMEjLUMXx
2•justinjeff•1h ago•2 comments

Google to allow Gmail users to change their primary email address

https://www.neowin.net/news/google-to-finally-allow-gmail-users-to-change-their-primary-email-add...
1•mikece•1h ago•0 comments

Show HN: Debug Buddy – A Chrome extension for console errors using Claude

https://github.com/mechramc/debug-buddy-claude
1•mechramc•1h ago•1 comments

The Compiler Is Your Best Friend, Stop Lying to It

https://blog.daniel-beskin.com/2025-12-22-the-compiler-is-your-best-friend-stop-lying-to-it
1•thunderbong•1h ago•0 comments

I made a tool to remove ChatGPT watermarks

https://www.gptcleanup.com/
1•emmanuelasika•1h ago•1 comments

Judge Blocks Detention of British Researcher Who Scrutinizes Online Hate

https://www.nytimes.com/2025/12/25/us/politics/imran-ahmed-judge-order.html
4•perihelions•1h ago•2 comments

Snowfall in Basic

https://www.goto10retro.com/p/snowfall-in-basic
2•ibobev•1h ago•0 comments

Easily Dealing with Any-Dimensional Planes

https://gpfault.net/posts/hyperplanes.html
1•ibobev•1h ago•0 comments

Time in C++: Inter-Clock Conversions, Epochs, and Durations

https://www.sandordargo.com/blog/2025/12/24/clocks-part-5-conversions
2•ibobev•1h ago•0 comments

Apple hit with $115M fine for "burdensome" App Store privacy policy

https://arstechnica.com/tech-policy/2025/12/apple-hit-with-115m-for-extremely-burdensome-app-stor...
2•yellow_postit•1h ago•0 comments

Koine

https://github.com/pattern-zones-co/koine
1•handfuloflight•1h ago•0 comments

Gone, Numb. // An essay as I explore justice.gov records

https://operand.online/chronicle/numb
3•c4lliope•1h ago•0 comments

Rocket Engine Wasn't Designed by Humans

https://www.youtube.com/watch?v=6Xx1GXjRbMk
1•bane•1h ago•0 comments