Question about fixtures code

[Tusenka]

What is a fixture closure?
https://github.com/pytest-dev/pytest/blob/main/src/_pytest/fixtures.py

[graingert]

Do you mean something like this?

@pytest.fixture
def user_factory() -> Generator[Callable[[], User]]:
    with contextlib.ExitStack() as stack:
        def create_user():
            u = User()
            stack.callback(u.delete)
            return u
        yield create_user