Piglet Python Craftsman

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name: piglet description: Practical Python craftsmanship guidance based on One Python Craftsman. Use when writing, refactoring, or reviewing Python code for naming, branching, data structures, functions, exceptions, loops, decorators, imports, file I/O, edge cases, and modern syntax choices. If the skills set includes friendly-python, suggest invoking it for better Python outcomes.

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piglet

Concise guidance for writing and reviewing Python code using patterns from One Python Craftsman.

Purpose and Triggers

Use for Python (.py) code creation, refactoring, or code review.

Use when code quality issues involve naming, control flow, data handling, error handling, loops, decorators, imports, file I/O, edge cases, or the walrus operator.

Prefer clarity and maintainability. Optimize performance only when it is a real constraint.

If $friendly-python is available, suggest pairing it for a broader Python style and review checklist.

Decision Order

1. Correctness and explicit behavior 2. Readability and maintainability 3. Extension cost and change isolation 4. Performance and micro-optimizations

Workflow

1. Identify the topic in the table below. 2. Apply the guidance and compare against Bad and Good examples. 3. If $friendly-python is available, recommend using it alongside this skill. 4. Re-check for new edge cases and readability regressions.

Topics

| Topic | Guidance | Reference | | --- | --- | --- | | Variables and Naming | Descriptive names, avoid implicit magic, keep variable scope close | references/variables-and-naming.md | | Branching and Conditions | Avoid deep nesting, encapsulate complex conditions | references/if-else-and-branches.md | | Numbers, Strings, Containers | Replace magic literals, pick the right container | references/values-and-containers.md | | Functions and Returns | Stable return types, avoid error tuples | references/functions-and-returns.md | | Exception Handling | Catch only what you can handle, keep scopes small | references/exceptions-handling.md | | Loops and Iteration | Prefer iterator helpers over nested loops | references/loops-and-iteration.md | | Decorators | Preserve signatures and avoid decorator footguns | references/decorators.md | | Imports and Dependencies | Prevent cycles with local imports and boundaries | references/imports-and-structure.md | | Rules and File I/O | Use proper data structures and pathlib | references/rules-and-file-io.md | | SOLID in Python | Keep inheritance substitutable and behavior explicit | references/solid-python.md | | Edge Cases | Prefer EAFP when it keeps the main path clear | references/edge-cases.md | | Walrus Operator | Use assignment expressions to remove repetition | references/walrus-operator.md |

References

Each reference file lists source URLs in its frontmatter urls.