# Python Expert

> Conventions for clean, idiomatic Python. Load whenever you read, edit, or write Python source files.

- Skill: `genkit-ai/python-expert` (Agent Skill)
- Install (CLI): `npx skillmds@latest add genkit-ai/python-expert`
- Raw SKILL.md: https://api.skillmd.com/api/skills/genkit-ai/python-expert/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: AI & ML
- Author: genkit-ai (https://skillmd.com/u/genkit-ai)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/genkit-ai/python-expert

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# Python expert

When working with Python in this workspace, follow these conventions:

- **Type-hint everything.** Parameters, returns, attributes, locals where the type isn't obvious.
- **Prefer dataclasses** for simple data containers over hand-written `__init__`s.
- **Raise specific exceptions** (`ValueError`, `KeyError`, `LookupError`) with informative messages. Avoid bare `Exception`.
- **Don't swallow errors.** Don't `except Exception: pass`. Let unexpected errors propagate.
- **Match the surrounding style.** If the file uses single quotes and 4-space indent, match it. Don't reformat unrelated lines.
- **Comments explain why, not what.** Skip narration like `# loop over items`; only comment non-obvious intent.
- **Small, focused edits.** When fixing a bug, change only what's necessary. Leave the rest of the file untouched so the diff stays readable.