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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!

Show HN: The Structural Operating System for the AI Era

https://typerion.io
1•Techman92•1m ago•0 comments

FinOps for AI: Track What Your Code Costs per Commit

https://mooracle.io/blog/finops-ai-planning-poker/
1•theanonymousone•2m ago•0 comments

Egypt's Great Pyramid is also a great earthquake dampener

https://www.science.org/content/article/egypt-s-great-pyramid-also-great-earthquake-dampener
1•tzury•2m ago•0 comments

Harness, Scaffold, and the AI Agent Terms Worth Getting Right

https://huggingface.co/blog/agent-glossary
1•sergiopaniego•3m ago•0 comments

Collapse of Personal Computing – Investigation into the Destruction of Ownership [video]

https://www.youtube.com/watch?v=zyQwAhppWj8
1•alecco•4m ago•0 comments

What if every input, search and list was predictive?

https://aito.ai/blog/the-predictive-application/
1•arauhala•4m ago•0 comments

Basecamp Five

https://world.hey.com/dhh/basecamp-five-8fcfd2ef
2•software_writer•7m ago•0 comments

Daily Murder: a daily whodunit puzzle solved by logic on an elimination grid

https://dailymurder.com
1•KeepComputing•8m ago•0 comments

My Favorite Fable

https://sive.rs/horses
1•Michelangelo11•8m ago•0 comments

Skill to Income Mapping Engine

https://www.tooldocket.com/2026/05/skill-to-income-calculator.html
1•stoicstoic•8m ago•0 comments

Study: AI is helping to develop new gallium-based semiconductor

https://news.flinders.edu.au/blog/2026/05/26/ai-speeds-up-discovery-of-next-gen-computer-chips-an...
1•giuliomagnifico•9m ago•0 comments

Netherlands blocks U.S. takeover of DigiD operator Solvinity

https://nltimes.nl/2026/05/26/netherlands-blocks-us-takeover-digid-operator-solvinity-security-co...
3•nemoniac•10m ago•0 comments

IT Doesn't Matter [pdf]

https://www.classes.cs.uchicago.edu/archive/2014/fall/51210-1/required.reading/ITDoesntMatter.pdf
1•harlequinetcie•16m ago•1 comments

DBase is back, sort-of... Error: database not found

https://delphinightmares.substack.com/p/dbase-is-back-sort-of
1•deeaceofbase•19m ago•1 comments

Show HN: High-performance parallel save/load for large NumPy

https://github.com/NoteDance/parallel-saver
1•NoteDance•20m ago•0 comments

Steve Jobs MIT Sloan Distinguished Speaker Series (1992)

https://www.youtube.com/watch?v=Gk-9Fd2mEnI
1•downbad_•24m ago•0 comments

"Peak Civilization": The Fall of the Roman Empire (2009)

http://theoildrum.com/node/5528
1•downbad_•25m ago•0 comments

China vs. Taiwan: The Geography of an Unfinished War

https://jstribune.com/china-vs-taiwan-the-geography-of-an-unfinished-war/
2•bryanrasmussen•25m ago•0 comments

The AI bubble isn't like the internet bubble

https://pluralistic.net/2026/05/26/the-ai-will-continue/#until-morale-improves
7•doener•28m ago•1 comments

Sparse Autoencoders Reveal Cortical Brain-LLM Semantic Mapping

https://letsdatascience.com/news/sparse-autoencoders-reveal-cortical-brain-llm-semantic-mappi-bc5...
2•bryanrasmussen•29m ago•0 comments

BBC program on wave-powered boats [video]

https://www.youtube.com/watch?v=UWpxtfmpVD4
1•msuniverse2026•29m ago•0 comments

Microsoft and Uber Are Running into an AI Cost Problem

https://firethering.com/microsoft-uber-ai-coding-tools-more-expensive-than-human-workers/
5•steveharing1•32m ago•4 comments

StyloBot- Open Source self hosted behavioural bot protection

https://stylobot.net
1•scottgal•34m ago•0 comments

Benchmarking Vortex File Format vs. Parquet, CSV vs. DuckDB, Polars, Datafusion

https://dataengineeringcentral.substack.com/p/benchmarking-vortex-file-format-vs
2•eigenBasis•34m ago•0 comments

Raft Consensus with a Minority of Nodes

https://padhye.org/raft-minority/
1•moarbugs•34m ago•0 comments

Delta Brain Sync · Streamlit

https://delta-brain-sync-k99vym7mbyebesrfdl84sm.streamlit.app
1•TELEFOXX•35m ago•0 comments

Solar, wind and batteries push down electricity bills for homes and business

https://reneweconomy.com.au/solar-wind-and-batteries-push-down-electricity-bills-for-homes-and-bu...
3•doener•35m ago•0 comments

EU plans to fine Google high triple-digit million euro sum, Handelsblatt reports

https://www.reuters.com/world/europe/eu-plans-fine-google-high-triple-digit-million-euro-sum-hand...
2•LelouBil•36m ago•0 comments

PHP – simple way to send HTTP headers before a script ends

https://shkspr.mobi/blog/2026/05/php-simple-way-to-send-http-headers-before-a-script-ends/
1•blenderob•36m ago•0 comments

Terjangkau: Neighborhood Explorer

https://github.com/altilunium/terjangkau
1•altilunium•36m ago•0 comments