Chapter 5: Installing Python

UV also replaces pyenv as python version manager.

We can check the python version by running:

$ uv run python --version

Python 3.8.4

Now, we like to use cutting edge technology so settings the python version is as easy as modifying the pyproject.toml file

[project]
name = "yt-uv"
version = "0.1.0"
description = "Add your description here"
readme = "README.md"
requires-python = ">=3.12"
dependencies = [
    "typer>=0.12.4",
    "requests",
]

[build-system]
requires = ["hatchling"]
build-backend = "hatchling.build"

[tool.uv]
dev-dependencies = [
    "pytest>=8.3.2",
]

Then running

uv sync

installs python 3.12, re-resolves all dedependencies and links the python version to our .venv

uv run python --version

Python 3.12.5

You can also manually install and uninstall python versions with

uv python install <version>
uv python uninstall <version>