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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!

Scaling NumPy on Free-Threaded Python

https://labs.quansight.org/blog/scaling-numpy-on-free-threaded-python
1•birdculture•1m ago•0 comments

Repo sets the rules. Charlie runs the review

https://charlielabs.ai/blog/your-repo-sets-the-rules-charlie-runs-the-review/
1•briandoll•1m ago•1 comments

Elon Musk's xAI sues Minnesota over law to ban 'nudify' apps

https://www.cnbc.com/2026/07/28/spacexs-xai-sues-minnesota-over-law-to-ban-nudify-apps-.html
1•rmason•2m ago•0 comments

As/400 systems security vulnerabilities

https://app.opencve.io/cve/?product=iseries_as_400&vendor=ibm
1•uticus•4m ago•0 comments

The Making of Don Matrelli's Legacy

https://marnetto.net/2026/07/18/dml-making-of-1
1•austinallegro•4m ago•0 comments

Intelligent Whole Body Control [video]

https://www.youtube.com/watch?v=9MNLEAzA59o
1•petethomas•4m ago•0 comments

AI Boom Spurs Insider Selling by Nvidia, CoreWeave Billionaires

https://www.bloomberg.com/news/articles/2026-07-29/ai-boom-spurs-insider-selling-by-nvidia-corewe...
1•mapping365•6m ago•1 comments

The Wheels We Keep Reinventing – Blain Smith

https://blainsmith.com/articles/reinventing-the-wheel/
1•rbanffy•7m ago•0 comments

Demystifying DRAM Read Disturbance: RowHammer and RowPress Phenomena

https://arxiv.org/abs/2607.28233
3•Jimmc414•9m ago•0 comments

Orch-OR 2.0: Hybrid Thermal Entanglement for bio-digital coherence

https://zenodo.org/records/21721985
1•Serena_Zayn•9m ago•0 comments

Pennsylvania Struck Down Mandatory Life Without Parole for 2nd-Degree Murder

https://www.themarshallproject.org/2026/07/31/felony-murder-pennsylvania-overturned-second-degree
1•Jimmc414•9m ago•0 comments

Google Earth risked ruin with retracted AI tool for making fake satellite pics

https://arstechnica.com/ai/2026/07/google-earth-releases-swiftly-retracts-ai-feature-to-make-fake...
1•stalfosknight•10m ago•0 comments

Australia's Social Media Ban for Under-16s Has Had Limited Impact So Far

https://www.engadget.com/2227908/australia-social-media-ban-for-kids-under-16-impact-so-far/
2•speckx•10m ago•0 comments

Post-Quantum TLS Certificates

https://www.netmeister.org/blog/pqc-certs.html
1•fanf2•11m ago•0 comments

Time for OpenAI and Anthropic to take a leaf from Microsoft's book?

1•chrisjj•12m ago•0 comments

Opus 5 runs vending machines

https://andonlabs.com/evals/vending-bench-2
2•sudo_cowsay•13m ago•0 comments

Post-Scarcity Leads to Technological Stagnation

https://letter.palladiummag.com/p/post-scarcity-leads-to-technological
1•beardyw•14m ago•0 comments

When AI Starts Writing Systems Code

https://www.coreauto.com/blog/when-ai-starts-writing-systems-code
2•skidrow•15m ago•0 comments

Bitcoin slides as Strategy plans up to $5B in crypto sales

https://www.msn.com/en-us/money/economy/bitcoin-slides-as-strategy-plans-up-to-5-bil-in-crypto-sa...
2•petethomas•15m ago•0 comments

Artificial Intelligence: Ars Notoria and the Promise of Instant Knowledge

https://publicdomainreview.org/essay/ars-notoria/
1•hakkikonu•15m ago•0 comments

Progress toward compiling Linux with gccrs

https://lwn.net/SubscriberLink/1083202/f1ba926cd57ac5c5/
2•rbanffy•15m ago•0 comments

YouTuber Hank Green pauses multiple channels after admitting he relies on AI

https://www.dexerto.com/youtube/hank-green-faces-major-backlash-after-admitting-he-used-chatgpt-t...
1•javhu•16m ago•0 comments

Kimi K3 with First Tree Beats GPT 5.6 Sol on a Real Engineering Task

https://twitter.com/first_tree_ai/status/2082968809414254812
2•thenextan•19m ago•0 comments

The Dancing Plague of 1518

https://publicdomainreview.org/essay/the-dancing-plague-of-1518/
2•hakkikonu•19m ago•0 comments

Do your backtests ever hit i64 limits?

https://www.reddit.com/r/quant/comments/1vc2dk1/do_your_backtests_ever_hit_i64_limits/
1•syumei•22m ago•0 comments

DeepSeek-V4-Flash-0731 model weights (MIT)

https://huggingface.co/deepseek-ai/DeepSeek-V4-Flash-0731
2•lostmsu•24m ago•0 comments

FreeCloud turns any of your web hosting space into a personal cloud drive

https://github.com/KyleBenzle/FreeCloud
1•KyleBenzleKyle•24m ago•0 comments

OpenAI finds evidence other AI agents escaped containment as it widens probe

https://www.reuters.com/business/openai-finds-evidence-other-ai-agents-escaped-containment-it-wid...
2•ajyoon•24m ago•1 comments

Show HN: Collaborative Docx Editor with MS Word Parity

https://collab.word-in-web.com/
2•theRealestAEP•24m ago•0 comments

Glanceboard

https://github.com/google-gemini/glanceboard
1•xnx•25m ago•0 comments