Identify and summarize common Python pitfalls in production code.
npx skills add https://github.com/WTFox/dotfiles --skill python-wtfox
Please help me install this Agent Skill. Skill: python Source: https://github.com/WTFox/dotfiles/tree/main/claude/.claude/skills/python Command: npx skills add https://github.com/WTFox/dotfiles --skill python-wtfox
Load when writing, reviewing, or debugging general Python code — not framework-specific. This guidance highlights the patterns Claude consistently gets wrong in production Python: mutable defaults, exception handling pitfalls, type hinting quirks, dataclass usage, closures, and other common gotchas.
Review the supplied Python code for common production pitfalls and refactor it to follow best practices.
High-intent search queries and answers about installing and using this skill.
Mutable default arguments in Python cause shared state bugs across calls. Use immutable defaults like None and initialize mutable objects inside the function body to ensure safe, isolated execution.
Common Python exception handling pitfalls include overly broad except clauses and swallowing errors. Apply specific exception types and ensure errors are logged or re-raised to maintain production code reliability.
Python type hints prevent runtime errors by enforcing static checks. Apply concrete types and avoid overly broad annotations to ensure robust code validation and maintainability.
Dataclasses provide structured data modeling in Python. Define explicit type annotations and use frozen classes to prevent accidental mutation, ensuring robust and maintainable production code.
Python closures capture variables by reference, leading to unexpected late-binding bugs. Use default arguments or factory functions to bind the current variable state and prevent production gotchas.
This Python code review guidance targets general production code, not framework-specific logic. It focuses on core language gotchas like mutable defaults, typing, and closures across any standard Python application.
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