modern-python

Run uv init --package myproject to create a distributable package with src/ layout, then use uv add for dependencies and uv add --group dev for tools like ruff, ty, and pytest. Install everything with uv sync --all-groups and run commands via uv run.

Run uv init --bare in the existing project, then add each dependency with uv add or loop over requirements.txt entries. Delete requirements.txt and old virtual environments, commit uv.lock, and use uv sync and uv run for all subsequent work.

Ruff is a Rust-based linter and formatter that replaces flake8, black, isort, pyupgrade, and pydocstyle in one tool. Configure it in pyproject.toml with select = ["ALL"] and explicit ignores, then run uv run ruff check and ruff format.

Yes, use PEP 723 inline metadata to embed dependencies directly in the script's comment block, then run it with uv run script.py. uv installs the declared dependencies automatically without a pyproject.toml or virtualenv setup.

ty is the recommended type checker from Astral, offering significantly faster checking than mypy or pyright. Add it with uv add --group dev ty, configure [tool.ty.environment] python-version in pyproject.toml, and run uv run ty check src/.

Avoid it when the user explicitly wants to keep legacy tooling, when Python versions below 3.11 are required, or in non-Python codebases. These tools target modern Python and assume uv-based dependency management.