Python Best Practices

Python is easy to learn, hard to master. These best practices set you apart from beginners.

Project Structure¶

myproject/ ├── src/myproject/ │ ├── __init__.py │ ├── main.py │ └── models.py ├── tests/ │ └── test_main.py ├── pyproject.toml ├── README.md └── .gitignore

pyproject.toml¶

[project] name = “myproject” version = “0.1.0” requires-python = “>=3.12” [tool.ruff] line-length = 100 select = [“E”, “F”, “I”, “UP”] [tool.mypy] strict = true

Key Principles¶

• Type hints everywhere
• Ruff for linting and formatting
• mypy –strict for type checking
• pytest for tests
• Virtual environment always

Key Takeaway¶

Type hints + Ruff + mypy + pytest = professional Python. pyproject.toml as the single source of truth.