uv run

Run a command or script.

デフォルトでは環境内の依存を最新化してコマンド実行

When used with a file ending in .py, the file will be treated as a script and run with a Python interpreter, i.e., uv run file.py is equivalent to uv run python file.py.

If the script contains inline dependency metadata, it will be installed into an isolated, ephemeral environment.

IMO：inline script metadataが書かれたスクリプトの場合は隔離した一時的な仮想環境、それ以外はpyproject.tomlに宣言された仮想環境（と理解した）

uv run --python 3.12 -- python

--frozen

Run without updating the uv.lock file.

--no-sync

Avoid syncing the virtual environment.

Implies --frozen, as the project dependencies will be ignored (i.e., the lockfile will not be updated, since the environment will not be synced regardless).

--no-project

Avoid discovering the project or workspace.

Instead of searching for projects in the current directory and parent directories, run in an isolated, ephemeral environment populated by the --with requirements.

If a virtual environment is active or found in a current or parent directory, it will be used as if there was no project or workspace.

--python

The Python interpreter to use for the run environment.

If the interpreter request is satisfied by a discovered environment, the environment will be used.