Python Brain

Central hub for all Python-specific knowledge. Covers the production AI Python stack. Async I/O, data tooling, structured outputs, packaging, CLI frameworks, and testing.

Pages here focus on Python tools and patterns. Deep-dives with Python code that live in the SE brain are cross-linked below.

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Core Stack

python/ecosystem · python/sqlalchemy · python/polars-duckdb

Structured Outputs and Libraries

python/instructor · python/pypi-distribution · python/latency-benchmarking

Deep-Dives in SE Brain (Python-focused)

cs-fundamentals/python-async-patterns · cs-fundamentals/python-packaging · cs-fundamentals/data-validation · cs-fundamentals/type-annotations · cs-fundamentals/cli-tooling · cs-fundamentals/logging-best-practices · cs-fundamentals/error-handling-patterns

Testing

test-automation/pytest-patterns · test-automation/testing-llm-apps

Common Failure Cases

Wikilink to a Python sub-page returns a 404 in Obsidian because the file is in a subdirectory and the link lacks the prefix
Why: Obsidian resolves [ecosystem](/python/ecosystem) to the first file named ecosystem.md in the vault; if two categories have an ecosystem.md the wrong one may be resolved without the full path [python/ecosystem](/python/ecosystem).
Detect: clicking a wikilink from this hub page opens the wrong page or shows "File not found"; the link text is unqualified (e.g., [ecosystem](/python/ecosystem) instead of [python/ecosystem](/python/ecosystem)).
Fix: always use fully qualified wikilinks for cross-category references; use [python/ecosystem](/python/ecosystem) not [ecosystem](/python/ecosystem).

Connections

cs-fundamentals/se-hub · web-frameworks/fastapi · apis/anthropic-api

Open Questions

• What performance characteristics only become problems at production scale?
• What does this library handle poorly that its documentation does not mention?