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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!

Is Jonathan Haidt right about smartphones?

https://www.tes.com/magazine/teaching-learning/general/jonathan-haidt-anxious-generation-right-ab...
1•hn_acker•1m ago•0 comments

'The History of Money’ review: What made the world go ‘round

https://www.wsj.com/arts-culture/books/the-history-of-money-review-what-made-the-world-go-round-f...
1•hhs•3m ago•0 comments

LifeWiki | The Wiki for Conway's Game of Life

https://conwaylife.com/wiki/
1•frozenseven•10m ago•0 comments

The Nintendo Virtual Boy Is Now Available for Preorder

https://www.cnet.com/deals/nintendo-virtual-boy-preorders-now-available/
2•not4uffin•13m ago•0 comments

By the Waters of Babylon (1937) by Stephen Vincent Benét [video]

https://www.youtube.com/watch?v=40C2Ua5FYdU
1•ShrugLife•17m ago•0 comments

Why is manufacturing productivity growth so low?

https://www.nber.org/papers/w34264
2•hhs•17m ago•0 comments

Oils 0.37.0 – Alpine Linux, YSH, and mycpp

https://oils.pub/blog/2025/12/release-0.37.0.html
1•birdculture•18m ago•0 comments

Silicon Valley was consistently 10 years ahead of its time

https://old.reddit.com/r/funny/comments/1pl2ui3/bro_how_was_the_show_silicon_valley_so/
2•doener•19m ago•0 comments

A Webapp to Search Emails as an Unikernel

https://blog.robur.coop/articles/2025-04-12-ptt-search-webapp.html
1•TheWiggles•20m ago•0 comments

OpenAI are quietly adopting skills, now available in ChatGPT and Codex CLI

https://simonwillison.net/2025/Dec/12/openai-skills/
2•simonw•24m ago•0 comments

Brain Crack (2006) [video]

https://www.youtube.com/watch?v=0sHCQWjTrJ8
2•RossBencina•26m ago•0 comments

50 years of proof assistants

https://lawrencecpaulson.github.io//2025/12/05/History_of_Proof_Assistants.html
5•baruchel•28m ago•0 comments

Special Dyslexia Fonts Are Based on Voodoo Pseudoscience

https://daringfireball.net/linked/2025/12/12/dyslexia-fonts-pseudoscience
1•erickhill•30m ago•0 comments

We Rebuilt Settings in Zed

https://zed.dev/blog/settings-ui
1•erhuve•33m ago•0 comments

US TikTok investors in limbo as deal set to be delayed again

https://www.bbc.com/news/articles/cp34442z25ko
2•1659447091•33m ago•0 comments

Compute in Space: a first principles interactive model

https://astrocompute.dev/
2•kvee•36m ago•0 comments

Industrialized Cybercrime Targets Trust in Public and Private Sectors

https://oilprice.com/Geopolitics/International/Industrialized-Cybercrime-Targets-Trust-in-Public-...
2•PaulHoule•37m ago•0 comments

Turning my reading list into podcasts

https://www.coryd.dev/posts/2025/turning-my-reading-list-into-podcasts
1•cdrnsf•37m ago•0 comments

Why RSS Matters

https://werd.io/why-rss-matters/
2•cdrnsf•38m ago•0 comments

Arduino UNO Q

https://www.arduino.cc/product-uno-q
2•swatson741•41m ago•0 comments

The Biggest Causes of Medical Device Recalls

https://spectrum.ieee.org/medical-device-recalls
2•sohkamyung•44m ago•0 comments

Show HN: Team-first Slack bot that turns bug reports into PRs using Claude

https://github.com/MattKilmer/claude-autofix-bot
1•madcash•44m ago•0 comments

Magit-insert-worktrees improves status buffers

https://huonw.github.io/blog/2025/12/magit-insert-worktrees/
2•dbaupp•44m ago•0 comments

Atmospheric CO₂ Monitoring Dashboard

https://climate.portaljs.com/co2-monitoring
1•CharlesW•46m ago•0 comments

Ukrainians sue US chip firms for powering Russian drones, missiles

https://arstechnica.com/tech-policy/2025/12/ukrainians-sue-us-chip-firms-for-powering-russian-dro...
12•voxadam•46m ago•0 comments

Show HN: Spacelink – link budget / comm system modeling Python library

https://github.com/cascade-space-co/spacelink
1•n6hpa•49m ago•0 comments

Rethinking Data Integrity: Why Domain-Driven Design Is Crucial

https://thenewstack.io/rethinking-data-integrity-why-domain-driven-design-is-crucial/
1•franckpachot•52m ago•0 comments

Post-Quantum Cryptography on CHERIoT

https://cheriot.org/pqc/2025/12/12/pqc-on-cheriot.html
3•todsacerdoti•57m ago•0 comments

Arkansas becoming first state to sever ties with PBS, effective July 1

https://www.ctvnews.ca/world/article/arkansas-becoming-1st-state-to-sever-ties-with-pbs-effective...
3•kotaKat•58m ago•0 comments

Trump signs order to block states from enforcing own AI rules

https://www.bbc.com/news/articles/crmddnge9yro
8•deliass•59m ago•1 comments