Function traverse

dash/_layout_utils.py:16–28

Yield ``(component, ancestors)`` for every Component in the tree. If ``start`` is ``None``, the full app layout is resolved via ``dash.get_app()``, preferring ``validation_layout`` for completeness.

(
    start: Component | None = None,
)

def traverse(
    start: Component | None = None,
) -> Generator[tuple[Component, tuple[Component, ...]], None, None]:
    """Yield ``(component, ancestors)`` for every Component in the tree.

    If ``start`` is ``None``, the full app layout is resolved via
    ``dash.get_app()``, preferring ``validation_layout`` for completeness.
    """
    if start is None:
        app = get_app()
        start = getattr(app, "validation_layout", None) or app.get_layout()

    yield from _walk(start, ())


def _walk(