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Human-curated Python news, projects, articles & tools.

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LangSmith Crash Course: LLMOps in Python

This video serves as a comprehensive crash course on LangSmith, the LangChain ecosystem platform used for tracing, debugging, evaluating, and monitoring AI agents. It covers essential LLMOps workflows including tracing agent runs, performing evaluations with custom datasets, creating alerts, and managing prompts.

https://www.youtube.com/watch?v=P3kmo04DiEw
asgeirtj / system_prompts_leaks

Documented system prompts from Anthropic - Claude Fable 5.1, Opus 5.5, Claude Design, Claude Code. OpenAI - ChatGPT GPT-6-Astra, Codex. Google - Gemini 3.8 Flash, 3.1 Pro, Antigravity. xAI - Grok, Grok Bot, Cursor, Kimi and more! Updated regularly.

https://github.com/asgeirtj/system_prompts_leaks
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Ciaren: open-source visual ETL exporting pandas and Polars code (alpha)

Build data pipelines visually, run locally, preview intermediate data, and export standalone Python scripts. Open-source alpha, AGPL-3.0.

https://ciaren.com/
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Python Algorithmic Trading Course – Massive, SnapTrade & Alpaca Integrations

This course demonstrates how to build an algorithmic paper trading system using Python and Django to calculate momentum scores and execute trades. The project integrates Massive for market data, SnapTrade for portfolio management, and Alpaca for risk-free brokerage simulation

https://www.youtube.com/watch?v=zH2Mg782XhA
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A Lean Proof Printing Python Union Find

Philip Zucker shows how a Python union-find data structure can generate Lean proof certificates, turning union and path-compression operations into machine-checkable equality proofs. He uses the experiment to explore the broader idea of treating proofs as traces of search, with applications to e-graphs and theorem-proving systems.

https://www.philipzucker.com/proof_uf/
Why You NEED This New Python Tool

Pyrefly is Meta’s open-source static type checker for Python, designed to catch type-related bugs before code runs instead of waiting for runtime failures. The video explains why Python and type hints alone can miss these errors, and shows how Pyrefly detects them early in real-world codebases.

https://www.youtube.com/watch?v=lFA-zuZRG4Q