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@kprsnt2/MyLocalCLI
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Best practices for Python development including PEP 8, modern Python 3.10+ features, and package management.

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SKILL.md

name python
description Best practices for Python development including PEP 8, modern Python 3.10+ features, and package management.
globs **/*.py, **/Pipfile, **/pyproject.toml, **/setup.py, **/requirements.txt
priority 100
tags language

Python Best Practices

Code Style

  • Follow PEP 8 style guide
  • Use snake_case for functions/variables
  • Use PascalCase for classes
  • Maximum line length: 88 (Black) or 79 (PEP 8)
  • Use meaningful variable names

Modern Python (3.10+)

  • Use f-strings for formatting: f"Hello {name}"
  • Use pathlib for file paths instead of os.path
  • Use dataclasses or Pydantic for data models
  • Type hints for function signatures
  • Use walrus operator := for assignment expressions
  • Use match-case for pattern matching
  • Use | for union types instead of Union

Error Handling

  • Be specific with exception types
  • Use context managers (with) for resources
  • Log exceptions with traceback
  • Never use bare except:
  • Use finally for cleanup

Package Management

  • Always use virtual environments (venv, conda, poetry)
  • Pin dependency versions in requirements.txt
  • Use pyproject.toml for modern projects
  • Separate dev dependencies from production

Testing

  • Use pytest over unittest
  • Use fixtures for test setup
  • Use parametrize for multiple test cases
  • Aim for high test coverage