Block.vertices_attribute
- Block.vertices_attribute(name, value=None, keys=None)
Get or set an attribute of multiple vertices.
- Parameters:
- namestr
The name of the attribute.
- valueobject, optional
The value of the attribute. Default is None.
- keyslist[int], optional
A list of vertex identifiers.
- Returns:
- list[Any] | None
The value of the attribute for each vertex, or None if the function is used as a “setter”.
- Raises:
- KeyError
If any of the vertices does not exist.