python

name	python
description	Use when writing or refactoring Python code under strict style constraints that require explicit field access, no reflection-style checks, no implicit defaults, and minimal exception handling.

Python (Strict)

Use this skill when the user wants strict, explicit Python code with low ambiguity and fail-fast behavior.

Core Rules

• Put all imports at the top of the file.
• Never use getattr or hasattr.
• Never use isinstance type checks.
• Do not introduce implicit defaults for required data paths.
• Avoid unnecessary try/except; only keep exception handling for a clearly required fallback or boundary.

Implementation Pattern

1. Validate required keys/attributes explicitly.
2. Use direct indexing/attribute access for required fields.
3. For optional branches, use explicit if "key" in obj checks.
4. Prefer fail-fast errors over silent fallback behavior.
5. Keep control flow straightforward; avoid defensive swallowing of errors.

Review Checklist

• Imports are module-level and grouped at file top.
• No reflective access helpers (getattr, hasattr).
• No runtime type filtering with isinstance.
• No hidden default values for required fields.
• Exception blocks are minimal and justified.
• Errors are explicit and actionable.

References

• references/patterns.md for quick before/after rewrite patterns.