Python Best Practice Checker
Senior-level Python code auditor for PEP 8, type safety, security vulnerabilities, and 3.10+ modernizations.
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See it in action
You say
Audit my user_auth.py file. Check for modern 3.10+ type hints, security flaws, and resource leaks.
Your agent does
[WARNING] Line 12: Mutable default argument 'roles=[]' detected. [ERROR] Line 45: Bare 'except:' swallows all exceptions. Specify 'KeyError' or 'DatabaseError'. [INFO] Line 22: Replace 'Union[str, int]' with 'str | int' for Python 3.10 compliance. Grade: B-. Action: Fix the bare except first.
What you get
About this skill
What it does
This skill transforms your AI agent into a senior Python architect, capable of performing deep-tissue audits of Python codebases. It goes beyond simple linting by analyzing code against PEP 8 style guides, PEP 484/585 type-hint standards, and modern Python 3.10+ idioms. It identifies security vulnerabilities like eval() injection, performance bottlenecks like O(n²) string concatenation, and common anti-patterns like mutable default arguments.
Why use this skill
While standard LLMs can write Python, they often default to outdated syntax or overlook subtle resource leaks and type inconsistencies. This skill enforces a rigorous, multi-phase audit process (Style, Type, Anti-pattern, Security, and Performance) that mimics a professional human peer review. It ensures your agent-generated code is production-ready, highly maintainable, and secure.
Supported standards and tools
- Formatting: PEP 8, Black-compatibility, and import organization.
- Typing: Modern PEP 604 (X | Y) syntax and PEP 585 generics.
- Security: Bandit-level detection of SQLi, hardcoded secrets, and unsafe deserialization.
- Performance: Iterator optimization and regex compilation strategies.
The Output
The skill produces a structured report grouping findings by severity (Critical to Info). Each finding includes the problematic line, a category, an explanation of the underlying risk, and a "Modern Python" code correction. It concludes with an overall quality grade (A-F) and a prioritized list of high-impact fixes.
How to install
Drop the file into your AI Agent. Works with Claude, Cursor, ChatGPT, and 20+ more.
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