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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!

Waymo Calls Police on Teenage Riders Who Were Drinking

https://www.roadandtrack.com/news/a71866405/waymo-robotaxi-calls-police-on-teenage-passengers-dri...
1•kerim-ca•2m ago•0 comments

Top Legal Adviser to Joint Chiefs Is Stepping Down a Year Before Completing Term

https://www.propublica.org/article/eric-widmar-retiring-joint-chiefs-legal-adviser
1•Jimmc414•4m ago•0 comments

Practical Lessons from Reinforcement Learning Post Training Experiments [pdf]

https://zenodo.org/records/21115798
1•luvverma2011•4m ago•0 comments

China Cuts 12,200 University Programs, Replaces Many with AI Degrees

https://www.forbes.com/sites/annaesakismith/2026/06/23/china-cuts-12200-university-programs-repla...
2•happy-go-lucky•10m ago•0 comments

Non-tech background, choosing between using CLaudeCode and CodeX

1•virtuallymundo•12m ago•0 comments

Texans deserve more then a Ken Paxton snake game

https://paxtonsnake.3d2k.com/
1•KilledByAPixel•13m ago•1 comments

Show HN: Figment – An AI that I made my friends talk to for 2 weeks

https://figment.computer/
1•subby•15m ago•0 comments

Burner Email, Temp email Box lasting 24 hours

https://burneremail24.com/
1•texasjosh•15m ago•0 comments

Llama 2 LLM on DOS (2025)

https://yeokhengmeng.com/2025/04/llama2-llm-on-dos/
1•userbinator•15m ago•0 comments

Rutazo – Argentina's freight marketplace, built solo in 4 months

https://www.rutazo.com
1•cookinat•15m ago•0 comments

Citicorp Center Engineering Crisis

https://en.wikipedia.org/wiki/Citicorp_Center_engineering_crisis
2•thunderbong•17m ago•1 comments

What's slowing down the AI buildout

https://www.worksinprogress.news/p/ai-is-bottlenecked-by-the-grid
1•droidjj•21m ago•0 comments

Researchers uncover possible cause of muscle pain from cholesterol medication

https://medicalxpress.com/news/2026-07-uncover-muscle-pain-widely-cholesterol.html
2•brandonb•23m ago•0 comments

Show HN: Free and OSS way to extend client-facing functionality of Linear

https://linear.gratis/
1•gvlachos•26m ago•0 comments

AI could keep poor countries poor

https://newsletter.deenamousa.com/p/ai-could-keep-poor-countries-poor
2•zaik•27m ago•0 comments

Morph Chess

https://www.david-duval.com/morph-chess/
1•dvduval•28m ago•1 comments

Looksmaxxing influencer who fled police found dead

https://thetab.com/2026/07/08/looksmaxxing-influencer-who-fled-police-found-dead-after-swimming-n...
2•andsoitis•29m ago•0 comments

Character AI Alternative for Roleplay

https://chatbrat.ai/bratlog/best-character-ai-alternatives-2026
1•henrypissler•30m ago•0 comments

The library of lost journals 603 pages novel fiction book

https://play.google.com/store/books/details/The_Library_of_Lost_Journals_The_Archivist_s_Journ?id...
1•mjbachhav•33m ago•0 comments

DDB: Source-Level Interactive Debugging for Distributed Applications

https://arxiv.org/abs/2607.06107
1•Jimmc414•34m ago•0 comments

Ask HN: How to recover from thin content or de-indexing penalty on Google

2•anitroves•34m ago•2 comments

Meta Patents AI Device That Tracks Your Emotions, Watches You Take Your Meds

https://www.404media.co/meta-patents-ai-device-that-tracks-your-emotions-watches-you-take-your-meds/
4•Jimmc414•34m ago•0 comments

Counterfeit Air-Bags Are Killing U.S. Drivers–and the Government Can't Stop It

https://www.wsj.com/business/autos/counterfeit-air-bag-parts-deaths-regulators-6eddfdd4
1•fortran77•35m ago•1 comments

Ergo: Long Form Philosophy Lectures

https://ergo.org/
1•agnishom•38m ago•0 comments

Neuromancer (TV Series) – IMDB

https://www.imdb.com/title/tt31512174/
1•evo_9•43m ago•0 comments

Two teens learn the hard way not to do toy gun drive-bys from a Waymo

https://arstechnica.com/cars/2026/07/two-teens-learn-the-hard-way-not-to-do-toy-gun-drivebys-from...
1•gbourne1•51m ago•2 comments

FIFA president targeted by complaint to Olympic ethics body

https://www.pbs.org/newshour/world/fifas-infantino-targeted-by-complaint-to-olympic-ethics-body-a...
1•Jimmc414•53m ago•0 comments

Automattic Code for the People Is Rallying Cry for Open Internet

https://variety.com/2026/digital/news/automattic-code-for-the-people-1236802508/
1•pentagrama•54m ago•0 comments

A self-driving Waymo just reports its own passengers to police

https://www.fastcompany.com/91570761/a-self-driving-waymo-just-reported-its-own-passengers-to-police
1•PaulHoule•55m ago•1 comments

Grudge: Stochastic data structure for holding multi-tenant grudges

https://github.com/satmihir/grudge
1•jscrab•56m ago•0 comments