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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!

Tech Startups Are Handing Out Free Nicotine Pouches to Boost Productivity

https://www.wsj.com/tech/tech-startups-are-handing-out-free-nicotine-pouches-to-boost-productivit...
1•iancmceachern•1m ago•0 comments

Man Viewed as a Machine (1955)

https://annas-archive.org/scidb/10.1038/scientificamerican0455-58/?viewer=1
1•dvrp•4m ago•0 comments

How to Use LLM as a Judge (Without Getting Burned)

https://twitter.com/manthanguptaa/status/2006222014265393316
1•jxmorris12•7m ago•0 comments

Show HN: An .icc Profile That Combines P3 and Adobe RGB into a Single Gamut

2•Nrbelex•9m ago•0 comments

Scientists unlock brain's natural clean-up system for new treatments for stroke

https://www.monash.edu/pharm/about/news/news-listing/latest/scientists-unlock-brains-natural-clea...
1•PaulHoule•11m ago•0 comments

Most Americans didn't read many books in 2025

https://yougovamerica.substack.com/p/most-americans-didnt-read-many-books
1•bobbiechen•12m ago•0 comments

The Golden Networking Hour

https://olshansky.info/posts/2025-12-31-the-golden-networking-hour
2•Olshansky•16m ago•1 comments

Vibe coding isn't for the vibe coders

https://fenomener.no/post/78ba027e-0855-43b3-afbd-8fbb9943ae99
1•0dKD•16m ago•1 comments

The Sounds of Long Distance pgm 13: DDD Demo Recordings 1971-1975 [video]

https://www.youtube.com/watch?v=QSsd8kreDOU
1•fortran77•19m ago•1 comments

Working with custom GUCs in Postgres extension

https://clickhouse.com/blog/taming-postgres-guc-extra-data
1•saisrirampur•20m ago•0 comments

A Survey of Dynamic Array Structures

https://azmr.uk/dyn/
3•ingve•21m ago•0 comments

Waymos are now coming for your coveted San Francisco parking spots

https://www.sfchronicle.com/sf/article/waymo-parking-21268658.php
2•mikhael•21m ago•1 comments

Alma – AI desktop app with persistent memory and tool use across AI providers

https://alma.now/
2•jinqueeny•22m ago•0 comments

Happy New Year

2•DenisDolya•22m ago•0 comments

TIL: I am an open-source contributor

https://beasthacker.com/til/i-am-an-open-source-contributor.html
1•beasthacker•22m ago•0 comments

Tesla owner completes first autonomous drive across America

https://nypost.com/2025/12/31/tech/tesla-owner-completes-first-fully-autonomous-drive-across-amer...
1•hnburnsy•24m ago•1 comments

2025: Two Decades of Piracy Reporting: TorrentFreak's Retrospective

https://torrentfreak.com/2025-two-decades-of-piracy-reporting-torrentfreaks-retrospective/
1•gslin•28m ago•0 comments

Vibe coding lead to my project's downfall (in 4 months)

https://old.reddit.com/r/gamedev/comments/1q043ym/how_vibe_coding_lead_to_my_projects_downfall/
3•YesBox•29m ago•2 comments

VC is subsidizing U.S. Material Science Research

https://ml4sci.substack.com/p/venture-capital-is-subsidizing-us
1•charlesxjyang•30m ago•0 comments

The Context Graph Manifesto

https://twitter.com/TrustSpooky/status/2006481858289361339
2•ContextGraphs•34m ago•0 comments

California schools will be required to restrict, prohibit student cell phone use

https://ktla.com/news/california/california-schools-will-be-required-to-restrict-prohibit-student...
1•geox•35m ago•0 comments

Show HN: DynamicHorizon – Dynamic Island for macOS

https://www.dynamichorizon.app
1•DHDEV•37m ago•0 comments

Warren Buffett steps down as Berkshire Hathaway CEO after six decades

https://www.latimes.com/business/story/2025-12-31/warren-buffett-steps-down-as-berkshire-hathaway...
6•ValentineC•38m ago•0 comments

A Box of Many Inputs: Browsers, Local Classifiers, and Roger Rabbit

https://allenpike.com/2025/a-box-of-many-inputs
1•ingve•38m ago•0 comments

C++ chrono-compatible low-level date algorithms

http://howardhinnant.github.io/date_algorithms.html
2•fanf2•40m ago•0 comments

Show HN: qq-pwn – A browser-based idler game

https://qq-pwn.com
1•qq-niklas•41m ago•0 comments

A modern tale of blinkenlights (reverse engineering a smartwatch)

https://blog.quarkslab.com/./modern-tale-blinkenlights.html
1•gavide•43m ago•0 comments

Show HN: Open Schematics – Largest Hardware Schematic Dataset

https://huggingface.co/datasets/bshada/open-schematics
2•hn_way•44m ago•0 comments

Musk claims Tesla Model Y is best-selling car in the world, but there are doubts

https://electrek.co/2025/12/31/elon-musk-claims-tesla-model-y-is-best-selling-car-world-serious-d...
6•breve•47m ago•2 comments

I'll pay you $10 to roast my startup

https://creditcrouton.com/waitlist
2•russellhaien•47m ago•1 comments