Describe a practical setup: "We use ruff for linting and formatting, mypy in strict mode for new code, and pre-commit hooks so nothing unformatted reaches the repo. CI fails on any violation."
Key tools: ruff or flake8 for linting, black or ruff format for formatting, mypy for type checking, isort for import ordering, pre-commit hooks to run checks automatically, and CI enforcement. Strong candidates discuss: adopting tools incrementally, configuring in pyproject.toml, using pre-commit framework, code review practices, and the balance between strict enforcement and developer experience. Mention ruff as the modern all-in-one replacement.
Tests professional Python practices. Candidates without linting or formatting tools will produce inconsistent code. Those with a complete toolchain in CI demonstrate team-oriented development.