Python

uv is an all-in-one Python dependency and environment manager that replaces pip and venv. Initialize a project with `uv init`, add dependencies via `uv add`, and uv automatically creates and manages your virtual environment and lock file for reproducible builds.

Ruff handles fast linting and formatting, while mypy performs static type checking. Run ruff to enforce code style and catch errors, then mypy to verify type annotations are correct, catching bugs before runtime in your Python codebase.

pytest is the standard testing framework for Python projects. Write test functions, run `pytest` to execute them, and integrate it with ruff and mypy to enforce linting, type safety, and test coverage across your Python development workflow.

Yes. uv manages dependencies and environments, ruff handles linting and formatting, mypy checks types, and pytest runs tests. Together they form a complete modern Python development stack that enforces quality from dependency management through testing.

pyproject.toml is the standard configuration file for Python projects and works with uv, ruff, mypy, and pytest. You can also use uv.lock or requirements.txt, but pyproject.toml centralizes tool configuration and dependency declarations for modern Python workflows.

uv generates a uv.lock file automatically when you add dependencies, ensuring reproducible environments across machines. If you have requirements.txt instead, uv can work with it, though uv.lock provides better dependency resolution and consistency for Python projects.